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R-Series Application Guide - Community Professional Loudspeakers

1. DISCUSSION W hen you can cover an entire facility from one location a point source system is an excellent choice In this example we ve covered all three sets of bleachers from the end zone using only four R Series loudspeakers The equipment cost is similar to the previous distributed system and the design is easy to expand for coverage of an opposite end zone bleachers or the field itself Feedback Artificial Echoes and the Announcer s Echo There s little chance of feedback in this design because the loudspeakers are a long distance from the announcer s micro phone There will be an announcer s echo for announcers located in either the press box or on the field See Page 9 for a discussion of these problems Field Coverage and Neighborhood Spill This design provides some field coverage To improve field coverage add additional R6 51s Mount the loudspeakers as high as possible and aim them down at the bleachers and field to minimize neighborhood spill Community R Series Application Guide Page 26 Alternate Loudspeaker Choices and 70 100 Volt Systems Add R6 Basshorn loudspeakers for extended low frequency response Most Community R Series and W ET Series loud Speakers are available in 70 100 volt versions Higher powered versions like the R2 and R6 can utilize optional external 70 100 volt autoformers This makes it possible to use smaller gauge wire to the loudspeaker location which helps reduce the overall system
2. For short to medium throw applications like gyms and small seating areas R SHP Three way full range 85 Hz to 16 kHz LF 1x 12 MF 1 x 2 HF 1x 1 200W RMS 500W PGM 6 ohms Available coverage pattern 60 x 40 For high level speech reinforcement and music reproduction R1 Two way full range 90 Hz to 16 kHz LF 1x 12 HF 1 x 1 200W RMS 500W PGM 8 ohms Available coverage patterns 60 x 40 60 x 60 90 x 94 For medium throw indoor and outdoor applications R2SUB Subwoofer 30 Hz to 500 Hz LF 2x12 400W RMS 1000W PGM 4 ohms For powerful low frequency reinforcement R6 Basshorn Basshorn 6 x 12 45 Hz to 500 Hz 1200W RMS 3000W PGM 4 ohms For high level very long throw low frequency reinforcement RSH 462 Exponential FocusedArray horn system a 400 Hz to 8 kHz p MF 4 x 2 300W RMS 750W PGM 11 ohms high level paging Community R Series Application Guide Page 2 Wl a i oe a For voice range announcement and a h TABLE OF CONTENTS I Vea FMI CIEVIEY T se Bl sevagea nce tia decide T T tananeaneieats Page 2 MOGUC TION EO RSC CS iadaapsisasiaanscaina a Page 4 6 Installation Application N otes ANd Safety csssssssesesesssssssscscsssssssssssssssesssrsrerererssesesesereseretes Page 7 9 SV SECIIN O GIT ZALOT naaa a a alc ed a a a ioe alas a eva Page 10 TF OW ED SE NCCC WGI pcan stccutesitessndciase at a a A Page 11 Basepal Field leraian nls lol
3. Colors show sound level variation in audi ence areas Conces sions and other areas will also receive sound not shown Either the R6 51 or RSH 462 is a good choice for this system See text for discussion DISCUSSION An air inflated structure is a common way to enclose a large sports field on a semi permanent basis Tennis and swim clubs may use this type of facility to enable patrons to enjoy their sports regardless of outside weather Because the air inflated structure has very thin walls and ceiling the acoustics will be very similar to outdoors There will be almost no echoes or reverberation at low and mid frequencies However there may be some unwanted reflections from the structure at high frequencies For this reason it s a good idea to aim the sound away from the walls and ceiling if possible A horn type loudspeaker can be helpful in reaching this goal Another audio challenge in an air inflated structure is the lack of ceiling structural beams for loudspeaker locations For this reason a point source long throw loudspeaker is often the only reasonable way to cover the patron areas W e are showing two choices for coverage of this facility The first is the RSH 462 a voice range horn loaded loud Speaker system with excellent speech intelligibility and line array type vertical pattern control to help keep the HF sound off the roof The second is the R6 51 a full range horn loaded loudspeaker with excellen
4. higher cost Community R Series Application Guide Page 47 INDOOR ICE RINK 2 SEMI DISTRIBUTED SYSTEM ON ROOF BEAMS Direct SPL dB Colors show sound level variation in audience areas Concessions and other areas will also receive sound not shown DISCUSSION Ice Rink Acoustics Designing a successful sound system for an indoor ice rink is a major challenge Most if not all surfaces are hard and the typical facility has little or no absorption material to quiet the reverberation This makes it difficult to design a system with good voice intelligibility Also patrons commonly want the system to be loud and musical for sporting events Although it s easy to design a loud system the facility acoustics make it difficult to achieve the musical goal O ne way to help meet these challenges is to specify absorption material to improve facility acoustics Absorption material can be sprayed onto the ceiling and girders and absorption panels can be installed on the walls General System Design Concepts There are two keys to improving intelligibility and getting good musical sound quality in a space like this First aim the loudspeakers at the listeners and as much as possible keep the sound away from the walls floor and ceiling Community R Series loudspeakers can help in this goal because they provide excellent pattern control Second to the extent possible keep the loudspeakers near the listeners This improv
5. s echo See Page 9 for ways to minimize this problem Alternate Loudspeaker Choices and 70 100 Volt Systems Add R 5SUB or R2SUBZ loudspeakers for extended low frequency response If the electronics rack is remotely located most Community R Series and W ET Series loudspeakers are available in 70 100 volt versions Higher powered versions like the R1 or R2 can utilize optional external 70 100 volt transformers This makes it possible to use smaller loud speaker wire which helps reduce the overall system cost As a lower cost design substitute Community s R 25 94Z or TZ for the R 5 models and our R 5 66Z for the R1 66Z This design will cover the audience well but at a lower level than the original design R SERIES LOUDSPEAKERS USED IN THIS DESIGN Co f m poms o R 5 66Z Used at each end of press box for left and right bleachers coverage e R 5 94Z Distributed along the overhang of the press box for bleachers coverage R1 66Z Used at each end of press box for distant bleachers or concessions coverage System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 13 BASEBALL FIELD 2 POINT SOURCE SYSTEM ON SINGLE LIGHT POLE R2 for long throw coverage R2 R1 for mid throw coverage R 5 for short throw coverage Colors show sound level variation in audience areas Field press box and other areas will also receive sound not shown DI
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7. Eyebolts and other mounting hardware for outdoor usage with R Series loudspeakers must be corrosion resistant steel properly rated for the load weight Community R Series Application Guide Page 7 INSTALLATION Custom brackets made of corrosion resistant properly rated steel may be used W hen mounting the loudspeaker the bracket should pull directly either in tension or shear on the mounting bolt It is recommended that any custom bracket utilize two mounting points on the opposite sides or top and bottom of the enclosure Mounting an R6 51 or R6 Basshorn Mounting systems for large loudspeakers like the R6 51 and R6 Basshorn vary widely depending on the needs of the facility For this reason Community does not supply a yoke fasteners or any other mounting hardware with the R6 51 or R6 Basshorn The installing contractor must supply all such hardware and must design a secure mounting system for the loudspeaker Always use properly rated corrosion resistant fasteners of an appropriate length secured with washers lock washers and Locktite or other fastener locking method The overall mounting system must be approved by a licensed P E USA or other certification professional outside USA before installation The R6 51 and R6 Basshorn have four primary mounting points with x 13 TPI stainless steel inserts suitable for suspension of the loudspeaker Two are located on the back of the loudspeaker One is on the top and one is on the
8. FOR MORE INFORMATION For more information on installing and operating your R Series loudspeakers please refer to Community s web site at www communitypro com For applications support service or warranty information refer to Community s web site or contact Community at 610 876 3400 1 800 523 4934 COMMUNITY STECHNICAL APPLICATION GROUP TAG Contact Community s TAG Team Technical Applications Group for applications support on systems that use R Series and other Community loudspeakers Our TAG Team can help choose the right product for each system and assist in system design loudspeaker layout acoustic simulation analysis and provide information needed for system commissioning Contact the TAG Team at 610 876 3400 1 800 523 4934 or email TAGTEAM communitypro com Community R Series Application Guide Page 9 SYSTEM OPTIMIZATION CHOOSING THE RIGHT LOUDSPEAKERS AND ELECTRONICS Choose R Series models with high enough maximum SPL to provide the needed SPL at the farthest listener with an appropriate headroom Typical headroom factors are at least 6 dB for voice paging at least 10 dB for voice reinforcement and at least 20 dB for music reinforcement Choose R Series models with the right frequency response for the application Subwoofers will improve the sound quality of a music reinforcement system but may reduce intelligibility in a voice only system in a reverberant space Choose R Series models with the right cove
9. PRESS BOX Colors show sound level variation in audience areas Field press box and other areas will also receive sound not shown is the best location for field coverage loudspeakers Center of press box roof R 5 short throw for R1 long throw for distant bleachers or concessions widen bleachers or concessions For field coverage see Discussion DISCUSSION W hen it s possible to use a distributed system outdoors the benefits are numerous This design offers smooth and even coverage of the seating areas with excellent sound quality and minimal neighborhood spill The equipment cost is moder ate and installation is relatively easy If the electronics rack can be located in the press box cable lengths are probably short enough to allow use of regular vs transformer R Series models which reduces total system costs The design is very flexible making it easy to add coverage for remote bleachers concessions player dugouts or the field itself Install the loudspeakers on a press box or centrally located concessions stand Alternatively use the edge of a roof over the bleachers Consider protecting the loudspeakers from thieves and vandals if they are hanging low enough to reach easily Field Coverage and Neighborhood Spill Ris located at the ends of the press box can cover remote seating areas a concession stand or player dugouts The press box distributed loudspeakers will provide some field coverag
10. artificial echo by separating two loudspeakers far enough apart that a listener hears the second loudspeaker at least 35 to 70 milliseconds after they hear the first loudspeaker There s no reflection here but the effect is the Same an unwanted echo To avoid normal echoes try to aim loudspeakers away from walls or buildings To avoid artificial echoes use a point source or distributed design as illustrated in this Applications Guide W hen it s necessary to split the loudspeakers try to avoid overlapping coverage That is to the extent possible each listener should hear only one loudspeaker The Announcer s Echo Imagine an outdoor system at a sports facility where the announcer is located 35 to 70 feet 11m 21m or more from the loudspeakers The announcer will hear his or her own voice Then about 35 to 70 milliseconds later the announcer will hear their own voice again as an echo Although a broadcast professional or other trained announcer may be able to ignore this echo most people find it difficult to speak in this situation To minimize the problem close the window in the announcer s booth Alternatively give the announcer a local monitor loudspeaker or a set of headphones so he can hear his own voice strongly This masks the echo and minimizes the distraction This same problem occurs for an announcer on the field in a sports facility Use a monitor loudspeaker or headphones as described above to minimize this problem
11. cost R SERIES LOUDSPEAKERS USED IN THIS DESIGN R 6 a R2 694Z For coverage of the end zone bleachers R6 51BIAMP For coverage of the home and away team bleachers System Cost Estimate Based on cost comparison scale lower cost higher cost a Community R Series Application Guide Page 27 LARGE FOOTBALL FIELD 3 MULTI POINT SOURCE SYSTEM ON LIGHT POLES NOT RECOMMENDED Colors show sound level variation in audience areas Field press box and other areas will also receive sound not shown Drect SPL dB fae 1065 me DISCUSSION Community does not recommend a multi point system of this design because it is very difficult to avoid artificial echoes Sometimes however it s just not possible to cover an entire football field from a single loudspeaker location and there aren t enough loudspeaker locations to allow a proper distributed system design In this case a multi point design may be the only solution The problem with this design is the artificial echoes that will be created in most locations Any listener that is at least 35 to 70 feet 11m 21m farther from one loudspeaker than another will hear a confusing echo That means in this design every listener will hear an echo Some listeners seated in the top row of bleachers may hear a full announcement twice Also loudspeaker cabling and installation costs will be high for this system M inimizing Artificial E
12. gyms the designer must often comply with sports regulations that may force the loudspeakers to be at or above the ceiling girders Point Source System A point source system is usually the lowest cost option for any facility The point source system in this example will pro vide ample level and excellent musical sound quality with good voice intelligibility In comparison the Ceiling Distributed design High School Gym 1 will provide better voice intelligibility and more flexibility for multipurpose use at somewhat higher cost Note the R 5COAX99 loudspeakers that cover the end zone area Use delay to synchronize these loud Speakers with the main loudspeakers M ulti Purpose U sage The four center mounted loudspeakers will provide adequate floor coverage for pep rallies but this system is not designed for uses where an audience is sitting in chairs on the floor Alternate Loudspeaker Choices and 70 100 Volt Systems The R2 loudspeakers used in this example are high power devices that can easily produce rock n roll levels in large gymnasiums W hen level requirements are lower consider the Community R1 loudspeaker series which offers excellent pattern control at a lower price Add R2SUBZ loudspeakers for extended low frequency response when students want rock n roll musical performance Accessory 70 100 volt transformers are available for R2 loudspeakers However if wire runs are short enough it may be possible to
13. team bleachers R1 64Z For coverage of the home team bleachers left R 5 94Z For coverage of the home team bleachers right R 25 94Z For coverage of the home team bleachers center areas System C ost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 19 SMALL FOOTBALL FIELD 2 POINT SOURCE SCOREBOARD SYSTEM Colors show sound level variation in audience areas Press box and other areas will also receive sound not shown Direct SPL dB DISCUSSION W hen you can cover an entire facility from one location a point source system is almost always the most economical choice In this example we ve covered both sets of bleachers from the scoreboard using only two R Series loudspeakers The equipment cost is significantly lower than the previous distributed system and the design is easy to expand for cover age of remote concessions or the field itself The lower equipment cost in this design will be somewhat offset by an in creased cost for installation and wiring Feedback Artificial Echoes and the Announcer s Echo There s little chance of feedback in this design because the loudspeakers are a long distance from the announcer s micro phone Also there s no chance of artificial echoes in this design since all the loudspeakers are in one location Real ech oes are possible of course so try to aim the loudspeakers away from any nearby walls o
14. them down at the bleachers This will minimize the amount of sound from one cluster reaching the opposite bleachers The announcer echo problem will be present in this system for both press box and field announcers Follow the rec ommendations on Page 9 to minimize this problem Community R Series Application Guide Page 22 Field Coverage and Neighborhood Spill This system will have some field coverage from the loudspeakers aimed at the bleachers Additional field coverage loud speakers are not recommended for this system because they would exacerbate the artificial echo problem To minimize neighborhood spill mount the loudspeakers as high as possible and aim them directly down at the bleachers A Better Way It s likely that both bleachers could be covered from the pole near the home team bleachers This would eliminate the artificial echo problem and reduce system costs because there would be no need to run loudspeaker cable to the away team bleachers area and all loudspeakers could be installed at the same time Use a long throw R2 loudspeaker such as the R2 52Z to reach the away team bleachers This loudspeaker may be too loud in the home team bleachers To minimize this problem mount the loudspeakers as high as possible and aim the long throw R2 away from the home team bleachers Alternate Loudspeaker Choices and 70 100 Volt Systems Add R2SUBZ loudspeakers for extended low frequency response Most Community R Series
15. 100 Volt Systems The R2 loudspeakers used in this example are high power devices that can easily produce hip hop or rock n roll levels in large gymnasiums W hen level requirements are lower substitute the Community R1 66Z for the R2 77Z The R1 loudspeaker series offers excellent pattern control at a lower price Add R2SUBZ loudspeakers for extended low frequency response when students want rock n roll musical performance N ote the position of the optional subwoofers in the diagram on the opposite page Locating the subs directly over the audience allows them to be operated at a lower level which reduces the room reverberation Accessory 70 100 volt transformers are available for R2 loudspeakers However if wire runs are short enough it may be possible to eliminate the transformers and reduce the system cost Choose amplifiers that are rated for the resulting low impedance load R SERIES LOUDSPEAKERS USED IN THIS DESIGN oy me fomes o E R2 77Z For coverage of bleachers R 5COAX99 For coverage of concessions use delay to synchronize with main loudspeakers System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 35 HIGH SCHOOL GYM 3 POINT SOURCE SYSTEM ON CEILING GIRDERS Colors show sound level variation in audience areas Other areas will also receive sound not shown Drect SPL db R2SU
16. 4TZ amp R 5xxTZ which is accessed by removing the plug Rotate the switch to the appropriate stop click for the desired tap using a flat head 1 screwdriver Re insert the plug screw after adjusting the tap to maintain weather resistance Use caution not to over tighten the plastic plug screw to avoid stripping the delicate plastic threads For the R 25 94T Z re install the plug so that is flush with the exterior of the cabinet to avoid undue pressure on the switch mechanism For additional information Community s web site includes specification sheets and a technical note on the design of 70 volt 100 volt distributed systems Custom Colors All R Series and W ET Series Il product may be ordered in custom colors to elegantly match their physical installation environment Please contact Community for a quote on cost and lead time Using Yoke Brackets Community provides one yoke type mounting bracket with every R Series loudspeaker except the R6 51 and R6 Basshorn In most cases this will be the preferred hardware for mounting these products The yoke attaches to the sides of the cabinet with the provided fasteners It also includes an array of holes along the center strap of the yoke to fasten to structural points deemed suitable by the installer and or professional engineer Using Safeties For some applications the installing contractor or professional engineer might deem necessary or advisable that R Series cabinets be installed wi
17. BZ optional R2 694Z a R 5COAX99 DISCUSSION Gymnasium Acoustics Designing a successful sound system for a school gymnasium is a major challenge Most if not all surfaces are hard and the typical gym has little or no absorption material to quiet the reverberation This makes it difficult to design a system with good voice intelligibility Also students commonly want the system to be loud and musical for their sporting events and pep rallies Although it s easy to design a loud system the gymnasium acoustics make it a challenge to achieve the musical goal One way to help meet these challenges is to specify absorption material to improve gymnasium acoustics Absorption material can be sprayed onto the ceiling and girders and absorption panels can be installed on the walls high enough to be out of the way of basketballs or volleyballs General System Design Concepts There are two keys to improving intelligibility and getting good musical sound quality in a gymnasium First aim the loud Speakers at the listeners and as much as possible keep the sound away from the walls floor and ceiling Community R Series loudspeakers can help in this goal because they provide excellent pattern control Second to the extent possible keep the loudspeakers near the listeners This improves the direct reverberant ratio which improves intelligibility Note Community R Series Application Guide Page 36 that in competition
18. OTICE Every effort has been made to insure that the information contained in this manual was complete and accurate at the time of printing However due to ongoing technical advances changes or modifications may have occurred that are not covered in this manual Community R Series pplication Guide Page 3 INTRODUCTION INTRODUCTION Community s R Series is a high quality high fidelity product line designed to be highly weather resistant R Series products perform consistently in continuous outdoor exposure while simultaneously providing superlative acoustic performance This Applications Guide discusses a variety of applications for R Series loudspeakers For each type of facility we have provided two or three different example designs with discussions about the merits of each design Although the specific facilities in this Guide are fictional the designs shown are representative of typical R Series applications and should be helpful in designing sound systems for similar facilities Community emphasizes that these examples were created as guidelines only They are not intended to be finished designs and may or may not be suitable for specific projects For a specific project Community recommends the services of a qualified acoustical consultant or design build contractor For specific projects Community s TAG Team Technical Applications Group can provide additional product and applications assistance and Community s web site has add
19. R SERIES APPLIGATION GUIDE Community THE COMMUNITY R SERIES R 25 Two way full range 100 Hz to 16 kHz LF 1x8 HF1x 200W RMS 500W PGM 8 ohms Available coverage pattern 90 x 40 R SCOAX Two way full range 80 Hz to 18 kHz LF 1x12 HF 1 x 1 200W RMS 500W PGM 8 ohms Available coverage patterns 60 x 60 90 x 90 For short throw applications such as concession areas gyms and as fill speakers R 5SUB Subwoofer 45 Hz to 150 Hz LF 1x 12 200W RMS 500W PGM 6 ohms For near field low frequency reinforce ment R2 Three way full range 70 Hz to 16 kHz LF 2 x 12 MF 1 x 2 HF 1 x 1 Model R2 52Z features MF 2 x 2 400W RMS 1000W PGM 4 ohms Available coverage patterns 50 x 20 70 x 70 90 x 40 40 70 x 40 60 90 x 40 For short to long throw applications requiring full bandwidth reproduction R6 51 Three way full range 50 Hz to 16 kHz LF 6 x 12 MF 6 x 2 HF 6 x 1 LF 1200W RMS 4 ohms MF 450W RMS 8 ohms HF 300W RMS 8 ohms For high level very long throw full range reinforcement RMG 200A Voice range horn system 400 Hz to 8 kHz MF 1 x 2 75W RMS 120W PGM 11 ohms For voice range announcement l For portable systems and as short throw fill speakers R 5 Two way full range 85 Hz to 16 kHz LF 1x 12 HF 1x1 200W RMS 500W PGM 8 ohms Available coverage patterns 60 x 60 90 x 40 90 x 90
20. SCUSSION W hen you can cover an entire facility from one location a point source system is almost always the most economical choice In this example we ve covered the entire bleachers area from a single light pole using only three R Series loud speakers The equipment cost is significantly lower than the previous distributed system and the design is easy to expand for coverage of remote concessions dugouts or the field itself The lower equipment cost in this design will be somewhat Offset by an increased cost for installation and wiring Also this design doesn t cover the seating area quite as evenly as the distributed system and there will be more neighborhood spill Often these minor tradeoffs are easy to accept given the reduction in cost Field Coverage and Neighborhood Spill For field coverage add an additional R2 R2s are available in a variety of coverage patterns for this purpose To minimize neighborhood spill choose the loudspeaker location so the loudspeakers point away from the neighborhood Also mount the loudspeakers high in the air and point them downward Community R Series Application Guide Page 14 Feedback Artificial Echoes and the Announcer s Echo Feedback is unlikely in this system because the loudspeakers are a long distance from the microphone There s no chance of artificial echoes in this design since all the loudspeakers are in one location Real echoes are possible of course so try to aim the loudspea
21. USED IN THIS DESIGN t 4 ae For use on light poles far throw For use on light poles mid throw For coverage of main bleachers near press box For coverage of under balcony areas near press box For comparison only lower cost higher cost Community R Series Application Guide Page 29 HIGH SCHOOL GYM 1A DISTRIBUTED SYSTEM ON CEILING GIRDERS Colors show sound level variation in audience areas Other areas will also receive sound not shown A ra Direct SPL dB a Fe a Tin DISCUSSION Gymnasium Acoustics Designing a successful sound system for a school gymnasium is a major challenge Most if not all surfaces are hard and the typical gym has little or no absorption material to quiet the reverberation This makes it difficult to design a system with good voice intelligibility Also students commonly want the system to be loud and musical for their sporting events and pep rallies Although it s easy to design a loud system the gymnasium acoustics make it a challenge to achieve the musical goal One way to help meet these challenges is to specify absorption material to improve gymnasium acoustics Absorption material can be sprayed onto the ceiling and girders and absorption panels can be installed on the walls high enough to be out of the way of basketballs or volleyballs General System Design Concepts There are two keys to improving intelligibility and getting good
22. a 180 degree inversion will not affect the coverage W hen the top of the enclosure is up the input cable gland nut will be down and to your right when looking directly at the front of the loudspeaker Also the manufacturer s label is on the top of the enclosure Once the top is determined you can properly orient the loudspeaker for your particular application according to the specified coverage pattern W hen installed outdoors Community recommends tilting an R Series loudspeaker downwards at least 15 to allow water to drain from the enclosure R Series Throw Distance and Sound Levels The chart on Page 11 helps answer the question how far can it throw The chart shows the maximum distance at which a given model can reach 96 dB SPL on the A Scale speech range Consider a high school football stadium where the crowd noise is 86 dBA At the recommended distance an R 25 or R 5 would provide 10 dB headroom above the crowd noise Even if the crowd noise reaches 90 dBA the R 25 or R 5 would still provide 6 dB of headroom which is acceptable for voice paging and announcement systems use a limiter to avoid clipping In larger facilities crowd noise can exceed 100 dBA At motor racing events racing noise can exceed 120 dBA near the track It is impractical and unsafe to try to page above these levels It s better to train announcers to wait till the crowd or motor noise quiets down and to repeat the page Additional N otes on Weather Res
23. ack must be protected from the weather and from temperature extremes R SERIES LOUDSPEAKERS USED IN THIS DESIGN Qy Modei Comments R2 52Z Coverage of home and away team bleachers System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 21 SMALL FOOTBALL FIELD 3 SPLIT POINT SOURCE ON TWO LIGHT POLES NOT RECOMMENDED Drect SPL dB 108 1 i Colors show sound level variation in audience areas Track press box and other areas will also receive sound not shown DISCUSSION Community does not recommend a split cluster system of this design because it is very difficult to avoid artificial echoes Some times however it s just not possible to cover an entire football field from a single loudspeaker location and there aren t enough loudspeaker locations to allow a proper distributed system design In this case a split cluster design may be the only solution The problem with this design is the artificial echoes that will be created in most locations Any listener that is at least 35 to 70 feet 11m 21m farther from one cluster than the other will hear an echo That means in this design every listener will hear a confusing echo M inimizing Artificial Echoes Listeners that hear only one cluster will not hear an echo Thus to minimize the problem of artificial echoes in this type of system mount the loudspeakers as high as possible and aim
24. al to improve pool acoustics Absorption material can be sprayed onto the ceiling and girders and absorption panels can be installed on the walls Such panels should be treated to resist moisture pool chemicals and mold and mildew General System Design Concepts There are two keys to improving intelligibility and getting good musical sound quality in an indoor swimming pool First aim the loudspeakers at the listeners and as much as possible keep the sound away from the walls floor ceiling and the water itself Community R Series loudspeakers can help in this goal because they provide excellent pattern control Sec ond to the extent possible keep the loudspeakers near the listeners This improves the direct reverberant ratio which improves intelligibility Community R Series Application Guide Page 38 Distributed System A distributed system Is usually the best way to achieve these goals The distributed system in this example will provide ample level and excellent musical sound quality with good voice intelligibility Position the two outside rows of loudspeak ers directly over the bleachers if possible to improve the direct reverberant ratio Provide a switch to turn off the loud speakers over the pool when they are not needed This will reduce reverberation buildup in the space Alternate Loudspeaker Choices and 70 100 Volt Systems The R 5 loudspeakers used in this example will provide ample level for most uses For rock n
25. and W ET Series loudspeak ers are available in 70 100 volt versions Higher powered versions like the R2 can utilize optional external 70 100 volt autoformers This makes it possible to use smaller gauge wire to the loudspeaker location which helps reduce the overall system cost R SERIES LOUDSPEAKERS USED IN THIS DESIGN R 5 66Z For coverage of the bleachers nearest the poles For coverage of the field and bleachers farthest from the pole For coverage of the home team bleachers right Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 23 LARGE FOOTBALL FIELD 1 SEMI DISTRIBUTED SYSTEM ON PRESS BOX Colors show sound level variation in audience areas Field press box and other areas will also receive sound not shown Drect SPL dB jg 39 q ri 36 35 34 33 q2 R2 52 R1 94 R2 52 R294 DISCUSSION This is an excellent design for a college or larger high school football stadium It combines the best features of a distrib uted system for the home team bleachers and a point source system for the end zone and away team bleachers All of the loudspeakers are in one general location which reduces installation costs and eliminates most artificial echoes If the electronics rack can be located in the press box cable lengths are probably short enough to allow use of regular vs transformer R Series models which reduces overall equipment costs If the
26. at calculates the quantity and location of loudspeakers used in a ceiling type distributed system Note that the R 5COAX99 and R 5CO AX 66 are equivalent to the CLOUD1299 and CLO UD 1266 for coverage calculations In High School Gym 1A the two outside rows of loudspeakers are pointed outwards at the bleachers This allows the system to use only four rows of loudspeakers In System 18 all of the loudspeakers point straight down For this rea son the system needs five rows of loudspeakers to achieve full coverage Intelligibility may be better with this system because the loudspeakers over the bleachers are closer to the listeners which creates a better direct reverberant ratio Using FORECASTER in Rooms With Sloped Floors This high school gym doesn t have a sloped floor However the bleachers put listeners closer to the ceiling so the system design is very similar to a room with a sloped floor To deal with this kind of challenge using FORECASTER divide the room into separate sections and treat them as separate rooms in the Ceiling System Software In this gymnasium example one room would be the gym floor and each set of bleachers would be another room Change the ceiling height for the bleachers room to be an average head height for the listeners in the bleachers Since this will be a lower height than the main floor the rows covering the bleachers will have more loudspeakers than the rows covering the main floor Communi
27. bottom The R6 51 and R6 Basshorn also have 10 holes in the front enclosure flange which are not designed for primary suspension usage or for safety cable attachment However these front mounting holes may be used as supplemental mounting points for support of the front of the loudspeaker N ote that on the R6 51 there are three bolts on the top and the bottom of the enclosure used to fasten the mid high pack to the inside of the loudspeaker These bolts are not suitable for suspension or for safety cable attachment For many applications the top and bottom mounting points used together are sufficient for secure mounting of these loudspeakers W hen a Safety cable mounting point is required one or both of the rear mounting points may be used In applications where the loudspeaker may be subjected to high wind loads or other unusual stresses Community recommends the loudspeaker be mounted from the top and bottom and at least one of the rear mounting points with the remaining rear mounting point available for a safety cable For additional support in these applications design the mounting structure to utilize the front mounting points as supplemental support W hen possible use all three mounting systems top bottom rear front W hen in doubt consult with the same licensed P E or other certification professional who will approve the design O rienting an R Series Loudspeaker An R Series loudspeaker has a definite top bottom and sides However
28. c horn patterns and two asymmetric horn patterns and all models except R 5SSUB R6 RMG and RSH are equipped with internal protection circuitry to guard against excessive power Because of their versatility performance and weather resistant properties R Series systems are found in many of the world s pre eminent motor speedways sports venues and convention centers R SERIES AND WET SERIES II W ET Series II is a major upgrade to Community s second weather resistant loudspeaker product line W ET was designed for exceptional musicality and speech intelligibility using premium components housed in attractive molded fiberglass enclosures available in white or black Although the two lines overlap in application Community s R Series is primarily designed for medium and long throw voice range applications where WET loudspeakers are primarily designed for short and medium throw musical applications This provides the designer with many opportunities for systems using both product lines Thus Community recommends R Series as the main loudspeaker systems for long throw applications like sports stadiums and we recommend WET Series Il for distributed systems in water parks or ski resorts that feature continuous music We encourage designers to explore the highly effective end results that can readily be obtained by mixing and matching these two product categories to best suit the design requirements R SERIES ACCESSORIESAND OPTIONS M ounting Yok
29. choes Listeners that hear only one loudspeaker will not hear an echo Thus to minimize the problem of artificial echoes in this type of system mount the loudspeakers as high as possible and aim them down at the bleachers This will minimize the amount of sound from one loudspeaker reaching the opposite bleachers Community R Series Application Guide Page 28 The announcer echo problem will be present in this system for both press box and field announcers Follow the recommendations on Page 9 to minimize this problem Field Coverage and Neighborhood Spill This system will have some field coverage from the loudspeakers aimed at the bleachers Additional field coverage loud speakers are not recommended for this system because they would exacerbate the artificial echo problem To minimize neighborhood spill mount the loudspeakers as high as possible and aim them directly down at the bleachers A Better Way Refer to the previous two examples for better ways to cover this stadium Alternate Loudspeaker Choices and 70 100 Volt Systems Add R2SUBZ loudspeakers for extended low frequency response at each position Most Community R Series and W ET Series loudspeakers are available in 70 100 volt versions Higher powered versions like the R2 can utilize optional external 70 100 volt transformers This makes it possible to use smaller gauge wire to the loudspeaker location which helps reduce the overall system cost R SERIES LOUDSPEAKERS
30. coverage from the loudspeakers aimed at both sets of bleachers For additional field cov erage add two R2s one on each side of the central R2 and aimed at the two ends of the field R2 loudspeakers are avail able in several coverage patterns for this usage Community R Series Application Guide Page 18 There will be some neighborhood spill behind the away team bleachers To minimize this problem put the R2 52Z as high as possible and aim it down at the away team bleachers Delay the other loudspeakers to avoid an artificial echo Feedback Artificial Echoes and the Announcer s Echo This type of system will not produce artificial echoes Real echoes are still possible of course so try to aim the loud speakers away from any nearby walls or buildings An announcer in the press box will be near the loudspeakers and should not hear an artificial echo If feedback is a prob lem provide a head worn mic or just shut the window An announcer on the field will hear a confusing announcer s echo See Page 9 for ways to minimize this problem Alternate Loudspeaker Choices and 70 100 Volt Systems Add R2SUBZ loudspeakers for extended low frequency response Most Community R Series and W ET Series loudspeak ers are available in 70 100 volt versions Higher powered versions like the R1 or R2 can utilize optional external 70 100 volt transformers R SERIES LOUDSPEAKERS USED IN THIS DESIGN Comments R2 52Z For coverage of the away
31. dequate level for most announcing requirements and their musical sound quality is excellent For rock n roll levels add Community s R2SU BZ for extended low frequency response If the equipment rack cannot be located in the pool house R 25 and R 5 Series loudspeakers are available in 70 100 volt versions for the required long cable runs Community R Series Application Guide Page 42 R1 64Z For coverage of entire pool area System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 43 OUTDOOR SWIMMING POOL 3 POINT SOURCE SYSTEM ON CENTER LIGHT POLE Colors show sound level variation in audience areas Pool house and other areas will also receive sound not shown DISCUSSION Sometimes it won t be possible to locate a loudspeaker cluster on a pool house roof see previous example In this case consider a point source system on alight pole as shown here This design uses only three R Series loudspeakers to cover the entire pool Feedback Artificial Echoes the Announcer s Echo and Neighborhood Spill This type of system will not produce artificial echoes Real echoes are still possible of course so try to aim the loud speakers away from any nearby walls or buildings including the pool house An announcer in the main pool house may hear an artificial echo If this is a problem provide the announcer with a
32. e W hen additional field coverage is needed choose a single loudspeaker location such as the center of the press box roof If there s a roof over the bleachers install field cov Community R Series Application Guide Page 12 erage loudspeakers at the front center edge of the roof Delay them if necessary to match the sound from loudspeak ers on the press box If there s a light pole behind the press box this is another potential location for field coverage loudspeakers Install them high enough to cover the field without overpowering listeners in the bleachers Delay other loudspeakers as needed to avoid an artificial echo A central location for field coverage loudspeakers will avoid the artificial echo problems created by a two source design If it s necessary to cover the field from two widely separated loudspeaker locations try to minimize the overlap in cover age That is aim the loudspeakers so their coverage patterns meet in the center of the field and use minimal overlap Feedback Artificial Echoes and the Announcer Echo A distributed system like this will not cause artificial echoes unless field coverage loudspeakers are remotely located or split see above However feedback is possible because the loudspeakers may be near the press box announce booth Provide a head worn mic or just shut the window to minimize this problem If the system includes field coverage an an nouncer on the field will hear an announcer
33. e Point Source System s signal arrival Refer to High School Gym design 3 Accessory 70 100 volt transformers are available for R2 loudspeakers However if wire runs are short enough it may be possible to eliminate the transformers and reduce the system cost Choose amplifiers that are rated for the resulting low impedance load This example also shows an optional pair of R 5 loudspeakers used to cover end zone seating R SERIES LOUDSPEAKERS USED IN THIS DESIGN R SHP a R2 52Z For coverage of areas farther from the cluster R SHP For coverage of areas near the cluster System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 51 CONVENTION CENTER DISTRIBUTED CEILING SYSTEM IN LARGE OPEN SPACE DISCUSSION Convention Center Acoustics A convention center space may be carpeted and have some acoustic treatment at the ceiling This reduces reverberation in comparison with a gymnasium or natatorium However the size of a space like this makes it a challenge to provide good voice intelligibility Also the space may need to be subdivided for multiple simultaneous events These challenges are best met with a ceiling distributed loudspeaker system Distributed C eiling System A distributed system offers the best way to cover a space like this and makes it possible to subdivide the room into Speaker zones It puts the loudspeakers as close as poss
34. e and M ulti Angle Aiming Strap All R 25 and R 5 models include a pre installed powder coated steel mounting yoke A Multi Angle Aiming Strap is included with selected R Series models to help keep the speaker aimed in the intended direction O ther Rigging Accessories Always purchase rigging accessories including eyebolts and other mounting hardware from a reliable supplier who certifies their products for the intended application For outdoor use or use in corrosive atmospheres like indoor swimming pools make sure the rigging accessories are corrosion resistant ATM Flyware a division of Allen Products is an example of a rigging supplier that supplies certified products for professional audio installations www atmflyware com Another example of a certified rigging products supplier is Polar Focus www polarfocus com Community R Series Application Guide Page 6 INSTALLATION 70 Volt 100 Volt Autoformer Transformer versions T suffix include an internal 200W 70 100V autoformer or transformer For 70V lines the input taps are 200W 100W 50W and 25W For 100V lines the taps are 200W 100W and 50W Some models have a multi wire input cable to select the tap R 5C oax R 5SUB R 5HP etc In this case termination is usually best made inside an appropriate electrical box weatherized as needed using standard wire splicing methods O ther versions have a screwdriver selectable switch accessible through a plug screw R 25 9
35. eliminate the transformers and reduce the system cost Choose amplifiers that are rated for the resulting low impedance load This example also shows an optional pair of R 5 loudspeakers used to cover end zone seating R SERIES LOUDSPEAKERS USED IN THIS DESIGN R S5COAX Qy Modi R2 694Z For coverage of bleachers R S5COAX99 For coverage of end zone use delay to synchronize with main loudspeakers System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 37 COMPETITION INDOOR SWIMMING POOL DISTRIBUTED SYSTEM ON CEILING GIRDERS Colors show sound level variation in audience areas Other areas will also receive sound not shown R1 facing outwards for bleachers coverage R 5 facing inwards for pool coverage DISCUSSION Indoor Swimming Pool Acoustics Designing a successful sound system for an indoor swimming pool also called a natatorium is a major challenge Much like a typical gymnasium most if not all surfaces are hard and there Is little or no absorption material to quiet the rever beration This makes it difficult to design a system with good voice intelligibility Also students commonly want the sys tem to be loud and musical Although it s easy to design a loud system the room acoustics make it a challenge to achieve the musical goal O ne way to help meet these challenges is to specify absorption materi
36. er the floor This keeps reverberation down when there s no need for floor coverage Alternate Loudspeaker Choices and 70 100 Volt Systems Add R 5SUB or R2SUBZ loudspeakers for extended low frequency response when students want hip hop or rock n roll musical performance R 5 loudspeakers are available in 70 100 volt versions as used in this example However if wire runs are short enough it may be possible to use standard versions at a slightly lower cost Choose amplifiers that are rated for the resulting very low impedance load As a lower cost alternate design substitute Community s R 25 94TZ for the R 5 99TZ The R 25 will cover the area well but at a lower level than the R 5 R SERIES LOUDSPEAKERS USED IN THIS DESIGN o ma fomes R 5 99TZ For coverage of all areas 70 100 volt transformer included System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 31 HIGH SCHOOL GYM 1B DISTRIBUTED SYSTEM ON CEILING GIRDERS FORECASTER Ceiling Distribution System Calculator DATA SUMMARY DATAINPLT 8 J _ Lair F rm per Room Dimension Lesmlprsker Cord E hio Gnd Dral aima i by bF byf 6 ran Celna fard Space Diririhan Parte ae Sake DISCUSSION The purpose of this system design is to show the capabilities of Community s FORECASTER Ceiling System Program A Microsoft Excel spreadsheet th
37. es the direct reverberant ratio which improves intelligibility Community R Series Application Guide Page 48 Semi D istributed Ceiling System Ice Rink 1 uses three rows of loudspeakers aimed downwards for floor rink coverage In contrast Ice Rink 2 uses only two rows to cover the same area These two rows are in the center of the floor and aimed outwards to cover a wider area Delay the rows covering the bleachers to synchronize with the sound from the two center rows This design will be less costly because it uses fewer loudspeakers but intelligibility will be slightly degraded for listeners on the floor If the facility is a permanent ice rink and floor coverage is primarily for music for patrons enjoyment this may be an acceptable compromise in return for cost reduction If the facility is a multi purpose arena consider the Ice Rink 1 system which is more versatile and provides better intelligibility on the floor Alternate Loudspeaker Choices and 70 100 Volt Systems Add R2SUB loudspeakers for extended low frequency response when patrons want rock and roll musical performance R 5 loudspeakers are available in 70 100 volt versions as used in this example However if wire runs are short enough It may be possible to use standard versions at a slightly lower cost Choose amplifiers that are rated for the resulting very low impedance load R SERIES LOUDSPEAKERS USED IN THIS DESIGN For coverage of ice rink floor and conce
38. h power high performance two way and three way passive crossover networks with over current protection circuitry 70V 100V models use a 200W high performance autoformer with lower loss than a true transformer the R SSUB T subwoofer uses a high performance true transformer Versatile M ounting Accessories W eather resistant powder coated steel yoke style mounting brackets are included with most models while a variety of optional mounting kits are available for others R SERIES MODELS The R Series family features 22 models that range in capability from short throw usage for local area fill less than about 50 feet or 15m to extremely long throw capable of reaching across an entire stadium as much as 700 feet or 215m A wide selection of coverage angles and power output capabilities characterize this versatile product line A small single 12 subwoofer called the R SSUB and a much larger dual 12 subwoofer called the R2SUBZ are available to complement full range systems A full horn loaded subwoofer bass augmentation loudspeaker is available as model R6 Basshorn Smaller R Series products are rotationally molded of polyethylene while the larger models are made from hand laid fiberglass All models are available in architectural light gray but custom colors are also available call for price and delivery quote All medium and long throw R Series systems feature horn loading in all frequency bands The R2 is offered in three symmetri
39. he shoulder of the eyebolt making contact with the rubber washer on the exterior of the cabinet A rubber washer shall be used between the eyebolt and the cabinet to maintain weather resistance Shims may be used between the eyebolt and the rubber washer to position the eye so that it is in the same plane as the suspension cable or chain Care must be taken to ensure that the safety cable will not induce a load off axis from the eyebolt s threaded shank Hoist Rings provide a method of attachment which has advantages over eyebolts that permit more flexibility in regard to the pull load direction of the safety line though at a higher cost Hoist rings include a hinged eye which allows the load applied to the cabinet threaded inserts to remain largely in shear thus preserving the integrity of the insert point The same precautions should be taken to properly seat the hoist ring as when seating an eye bolt As with all aspects of mounting and rigging loudspeakers the use of eyebolts hoist rings and other safety cabling hardware should be included in a rigging plan approved by a professional engineer IMPORTANT T he mounting bolts that come installed in each R Series enclosure must either be used to mount the Accessory Mounting Yoke or they must remain in place If the rigging fittings are not sealed air leaks will occur in the enclosure that will compromise the loudspeaker s weather resistance and its low frequency performance A IMPORTANT
40. higher cost Community R Series Application Guide Page 57 CITY STREET FESTIVAL SYSTEM POINT SOURCE AND DISTRIBUTED SYSTEM ON LIGHT POLES Colors show sound level variation in au dience areas Other areas will also receive sound not shown Drect SPL dE F 3 107 36 x City Street Road length gt 250m Circle radius gt 55m DISCUSSION This design uses a central cluster in the circle with distributed loudspeakers on delay to cover the street and sidewalk The result will be smooth and even coverage of the street and public areas with excellent sound quality and minimal neighborhood spill The equipment cost is moderate and installation is relatively easy The design is very flexible making it easy to add coverage for additional public areas concessions or music or dramatic performance areas W hen possible install the loudspeakers on light poles high enough to be out of easy reach of thieves and vandals Artificial Echoes the Announcer Echo and Neighborhood Spill The biggest problem with a wide spread outdoor system like this is echoes real and artificial To avoid real echoes try to aim the loudspeakers away from nearby buildings stone walls and other reflecting surfaces Artificial echoes are caused when a listener can hear two loudspeakers and the second loudspeaker is at least 35 to 70 feet 11m 21m farther away than the first There are two primary methods of avoiding
41. ible to the listeners and aims them directly at the listeners away from the walls and ceiling The loudspeaker layout could be easily calculated in Community s FORECASTER Ceiling System Software This will save considerable design time over using EASE Of course FORECASTER doesn t provide intelligibility estimates or detailed graphical coverage diagrams R Series vs CLOUD This example system uses R 5COAX66T loudspeakers which have a symmetrical 60 x 60 coverage pattern and a 200 watt 70V 100V autoformer An alternate choice for this system would be CLOUD1266T loudspeakers with the C12BB3 back box and C12SQGRL grille The CLOUD1266T has similar performance and a similar equipment price to the R SCOAX66T Although the CLO UD1266T is a more traditional choice for this type of system the R 5CO AX 66T is an excellent choice because it comes assembled and includes a yoke bracket and attached connecting cable These features may reduce Community R Series Application Guide Page 52 installation cost Also the R 5 can be ordered in a custom color at extra cost Thus the CLOUD1266T may be the right choice for a dropped ceiling system and the R 5CO AX 66T may be the right choice for an open ceiling Add R2SUBZ or CLOUD12SUB for extended low frequency response when patrons want rock n roll musical per formance R SCOAX R 5CO AX 66T For coverage of entire floor area System Cost Estimate Based on cost comparis
42. imizes neighborhood spill Feedback Artificial Echoes the Announcer s Echo and Neighborhood Spill This type of system will not produce artificial echoes Real echoes are still possible of course so try to aim the loud Speakers away from any nearby walls or buildings including the pool house An announcer in the main pool house will be near the loudspeakers and should not hear an artificial echo If feedback Is a problem teach the announcer to close talk the mic or just shut the window For most pools an announcer with a wire less mic in the pool area will not hear an announcer s echo To minimize neighborhood spill mount the loudspeakers as high as possible and aim them downward towards the pool Alternate Loudspeaker Choices and 70 100 Volt Systems The R 25 loudspeakers in this example will provide adequate level for most announcing requirements and their musical sound quality is excellent For hip hop or rock and roll levels consider Community s R 5 Series with the R 5SUB for extended low frequency response The R 5s also have improved pattern control which will help reduce neighborhood spill The R 5SUB may also be added to the R 25 system R 25 and R 5 Series loudspeakers are available in 70 100 volt versions as used in this example Community R Series Application Guide Page 40 R SERIES LOUDSPEAKERS USED IN THIS DESIGN R 25 94TZ For coverage of entire pool area System Cost Estimate Based on cost compar
43. ison scale lower cost higher cost Community R Series Application Guide Page 41 OUTDOOR SWIMMING POOL 2 POINT SOURCE SYSTEM ON POOL HOUSE ROOF Colors show sound level variation in audience areas Pool house and other areas will also receive sound not shown DISCUSSION W hen you can cover an entire facility from one location a point source system is almost always the most economical choice In this example we ve covered the entire pool area using only two R Series loudspeakers The equipment cost is lower than the previous distributed system and the installation costs will be lower as well Feedback Artificial Echoes the Announcer s Echo and Neighborhood Spill This type of system will not produce artificial echoes Real echoes are still possible of course so try to aim the loud Speakers away from any nearby walls or buildings An announcer in the main pool house will be near the loudspeakers and should not hear an artificial echo If feedback is a problem teach the announcer to close talk the mic or just shut the window For very long pools an announcer with a wireless mic at the far end of the pool may hear an announcer s echo See Page 9 for a discussion of this problem To minimize neighborhood spill mount the loudspeakers as high as possible and aim them downward towards the pool Alternate Loudspeaker Choices and 70 100 Volt Systems The R1 loudspeakers in this example will provide a
44. istance e No loudspeaker is completely weather proof However Community R Series loudspeakers are designed to withstand continuous outdoor exposure for many years of operation e Werecommend angling the R Series lo ker at least 15 ees downward so as to reduce the possibility of rain and other precipitation compromising the performance of the loudspeaker e All mounting holes must be sealed off with the supplied bolts washers and rubber washers If for any reason these bolts must be removed seal off the hole with silicone caulking or some other suitable weather tight sealant The rubber washers supplied with the mounting bolts must always seat against the enclosure e The gland nut securing the loudspeaker cable to the enclosure is sealed at the factory Do not attempt to remove this nut or the weather tight seal will be broken If it is desired to replace the gland nut with a connector the connector must be a Community R Series Application Guide Page 8 INSTALLATION weather proof design sealed to the enclosure with silicone caulk or some other suitable weather tight sealant N eutrik models NLT4MP and NLT4FX are good choices for this purpose When mounting we recommend installing R Series with the gland nut at the bottom wherever possible Always leave a drip loop so water will not migrate toward the loudspeaker e The grille assembly is designed to prevent normal and wind driven rain from directly entering the mouth of
45. itional resources including an All W eather All Purpose Brochure describing all R Series and W et Series II Models A DISCUSSION OF WEATHER RESISTANCE W eather resistant is a relative term that describes a loudspeaker s ability to resist the effects of weather in outdoor applications Typical weather related damage encountered in loudspeakers affects the enclosure drivers hardware and internal components such as crossovers Community s R Series enclosures are fabricated entirely of hand laminated fiberglass or roto molded gray polyethylene making them virtually impervious to weather related effects Fiberglass versions are coated with an attractive light gray gel coat to help keep the loudspeaker cooler in sunlight High frequency drivers and their diaphragms are made of highly weather resistant materials Midrange and low frequency cones are treated to repel moisture All external hardware on the loudspeaker is high grade steel or aluminum with a weather resistant powder coated finish The grille is backed with a layer of open cell foam supplemented by a fine mesh plastic to block rain or snow This grille sandwich is acoustically transparent but highly resistant to even driving rain The perforated metal grille also keeps out insects and birds There are no connectors on an R Series loudspeaker Instead a highly weather resistant type 12 3 6 m 16 2 JOW cable is permanently attached to the loudspeaker through a weather tight g
46. kers away from any nearby walls or buildings It s also possible that an announcer in the press box will hear an echo of his or her voice The same problem can occur for an announcer on the field See Page 9 for ways to minimize these problems Alternate Loudspeaker Choices and 70 100 Volt Systems Add R2SUBZ loudspeakers for extended low frequency response Most Community R Series and WET Series loud speakers are available in 70 100 volt versions Higher powered versions like the R1 or R2 can utilize optional external 70 100 volt transformers This makes it possible to use smaller gauge wire to the loudspeaker location which helps re duce the overall system cost As a lower cost alternative design substitute Community s R1 94Z for the R2 94Z the R1 64Z for the R2 52Z and an R 5 66Z for the R SHP This alternative design will cover the facility well but will not reach rock n roll levels R SERIES LOUDSPEAKERS USED IN THIS DESIGN R2 52Z For coverage of the center bleachers and bleachers farthest from the pole R 5HP For coverage of the bleachers nearest the pole For coverage of the bleachers to the right of the pole Community R Series Application Guide Page 15 BASEBALL FIELD 3 SPLIT POINT SOURCE SYSTEM ON TWO LIGHT POLES Colors show sound level variation in audience areas Field press box and other areas will also receive sound not shown This image is correct for the right hand pole Usea mirr
47. land nut This connection is far superior to any exposed connector DESCRIPTION OFTHE R SERIES All W eather All Purpose Though designed to handle the harshest outdoor conditions R Series is the perfect choice for many indoor environments W ith 22 models to choose from ranging from short throw with wide coverage angles to ultra narrow long throw systems the task of designing an acoustically and economically effective sound system has never been easier In many cases a small number of R Series loudspeakers can provide top quality sound for a surprisingly large physical area making them one of the most acoustically and economically effective solutions available anywhere R Series Applications R Series products are designed for permanent installation or portable use both outdoors and indoors The primary applications for Community s R Series are those where re entrant horns outdoor two way horn woofer loudspeakers and some larger horn loudspeakers typically are used but lack capability for both high quality music reproduction and longer distance voice projection By contrast R Series products have excellent fidelity and wide frequency range for both music reproduction and voice projection R Series products are ideally suited for athletic fields football soccer baseball tennis and field houses theme parks amusement parks swimming pools ski slopes cruise ships steeple carillons fairgrounds rodeos small arenas racing tracks air
48. li tilde a Page 12 13 Baspa FICO F Acuei ee ee ee Page 14 15 BS OI FEIU AS rai miaa a a alain Sanh adnan ange cA eae Page 16 17 Smal Fotpall ICIP EL testes cats ante cai cna ainsi cai ca bata hd bs cdi ca baca td aa cate ceed bea mana cao Sees S Dated atadaa de Page 18 19 SMa OO Coal CIC eZ ena a a A ean ae RET Page 20 21 SMa m0 01 gt Bi FEIA S een a ee Page 22 23 Large FOO toal Fiela A aan a adda Page 24 25 Large Footpall Field F2 awanan a a Page 26 27 Large OOM DIN Feld A onani a S Page 28 29 FIG SEMA l GIT MASH FLA assanis a aa Page 30 31 Fl IGN SCAOO li Gymnasium FL Busrssaninna a a a Page 32 33 FON SCHOO Gymnas ONA 2 e aG Page 34 35 Hioni School G VIM ASIN HS cane E A Page 36 37 Competition Indoor Swimming POO ss sssssssssssssinsnnnrensnnsnnnnonnennnnrnnrnnnnnnnnnnnnrnnnnnnnnnnnnnennnennennnna Page 38 39 OUdoor SWIMMING FOOI F lhisacnnn aa ied dausneuaacaaaeuate auauaenuannesiens Page 40 41 Outdoor SWIMMING POO F 2era a a e i Page 42 43 O tdoor SWIMMING PO Ol FES pcnssrsancann aAa n A E tasanatauta Page 44 45 CIO FCS RINK Alinna aa Page 46 47 MAGOT ICA RIDK F2 i a a te ee ee Page 48 49 MAOT AICORE Fo a A A T ere ere er cter rar eee Page 50 51 CONVENON CONT anan a Page 52 53 Warehouse or Large Ret all STOT G xassicwacaneciineniatuatschigis ielvasis soinatisanvasnts cieatansamiedetaaersiaaannitaiins Page 54 55 karge Alr Infiiated SUCUT G annrania a a tends Page 56 57 City Streets Festival Syste M sucssinsbicuioian na a Page 58 59 N
49. m both clusters These listeners will not hear an echo Field Coverage and Neighborhood Spill This system will have some field coverage from the R2 loudspeakers aimed at the bleachers For additional field coverage add an additional R2 at each pole R2s are available in a variety of coverage patterns for this purpose Feedback Artificial Echoes and the Announcer s Echo Listeners that hear only one cluster will not hear an echo Thus to minimize the problem of artificial echoes in this type of system aim the loudspeakers to cover one half of the listening area with a very small overlap area Community R Series loudspeakers have well controlled coverage patterns to help achieve this goal The announcer echo problem will also be present in this system Follow the recommendations on Page 9 to minimize this problem for announce booth and field an nouncers Alternate Loudspeaker Choices and 70 100 Volt Systems Add R2SUBZ loudspeakers for extended low frequency response Most Community R Series and W ET Series loudspeakers are available in 70 100 volt versions Higher powered versions like the R1 or R2 can utilize optional external 70 100 volt transformers This makes it possible to use smaller gauge wire to the loudspeaker location which helps reduce the overall system cost R SERIES LOUDSPEAKERS USED IN THIS DESIGN For coverage of the bleachers nearest the pole For coverage of the field and bleachers farthest from the pole Based o
50. musical sound quality in a gymnasium First aim the loud Speakers at the listeners and as much as possible keep the sound away from the walls floor and ceiling Community R Series loudspeakers can help in this goal because they provide excellent pattern control Second to the extent possible keep the loudspeakers near the listeners This improves the direct reverberant ratio which improves intelligibility Note Community R Series Application Guide Page 30 that in competition gyms the designer must often comply with sports regulations that may force the loudspeakers to be at or above the ceiling girders Distributed C eiling System A distributed system although not the lowest cost design offers the best way to achieve these goals It puts the loud Speakers as close as possible to the listeners and aims them directly at the listeners away from the walls and ceiling This design has two rows of loudspeakers facing downwards covering the floor and arow of loudspeakers angled slightly out wards covering each area of bleachers M ulti Purpose Usage Gymnasiums are often multi purpose spaces used for sporting events pep rallies concerts and dramatic performances and school assemblies For non sporting events a portable stage may be brought in and placed at one end of the gym floor To minimize feedback provide switches to turn off loudspeakers pointed at the stage location s Also consider a switch to turn off the loudspeakers ov
51. n Concepts There are two keys to improving intelligibility and getting good musical sound quality in a gymnasium First aim the loud Speakers at the listeners and as much as possible keep the sound away from the walls floor and ceiling Community R Series loudspeakers can help in this goal because they provide excellent pattern control Second to the extent possible keep the loudspeakers near the listeners This improves the direct reverberant ratio which improves intelligibility Note Community R Series Application Guide Page 34 that in competition gyms the designer must often comply with sports regulations that may force the loudspeakers to be at or above the ceiling girders Simplified Distributed System not Suitable for M ulti Purpose U se This design has a row of loudspeakers aimed at each set of bleachers This design is simplified from the previous design because there are no floor coverage loudspeakers Because of the lack of floor coverage this design Is less suitable for a multi purpose gym However it may be a good option for a competition gym that is only used for sports Musical sound quality will be excellent Voice intelligibility will be very good but not quite as good as the previous example which had the loudspeakers closer to the listeners Note the R 5CO AX 99 loudspeakers that cover the concessions area Use delay to synchronize these loudspeakers with the main loudspeakers Alternate Loudspeaker Choices and 70
52. n cost comparison scale lower cost higher cost Community R Series Application Guide Page 17 SMALL FOOTBALL FIELD 1 DISTRIBUTED PLUS POINT SOURCE SYSTEM ON PRESS BOX Colors show sound level variation in audience areas Field press box and other areas will also receive sound not shown DISCUSSION This is an excellent design for a small football stadium It combines the best features of a distributed system for the home team bleachers and a point source system for the away team bleachers All of the loudspeakers are in one general location which reduces installation costs and eliminates most artificial echoes If the electronics rack can be located in the press box cable lengths are probably short enough to allow use of regular vs transformer R Series models which re duces overall system costs If the roof of the press box is less than about 20 feet 6m above the heads of the nearest listeners the R2 52Z used for the away team bleachers may be too loud in the home team bleachers Look for an alternate location for the R2 52Z when this occurs Sometimes there s a light pole behind the press box This makes a good alternate location for the R2 52 Mount the R2 52Z at least 20 feet 6m above the heads of the nearest listeners 30 feet or 9m is better and delay the remaining loudspeakers if necessary to avoid artificial echoes Field Coverage and Neighborhood Spill This system will have some field
53. nctioning as a limiter Community s exclusive DYNA TECH protection circuitry found in many R Series models provides precise and repeatable protection by reducing excessive power to the drivers In other models PowerSense DDP Dynamic Driver Protection protection circuitry is built into the crossover to provide protection against excessive current Fiberglass or Polyethylene Horns and Enclosures Horns and enclosures on larger R Series models are constructed of hand laid fiberglass Fiberglass is inherently weather resistant while exhibiting the strength stiffness and non resonant characteristics needed to insure an acoustically inert loudspeaker enclosure Enclosures and horns for the R 5 and R 25 models are attractively molded from highly weather resistant polyethylene The unique curved shape of R Series and W ET Series II helps reduce standing waves within the enclosure for improved LF performance Outdoors the rounded shape inhibits standing water and helps to diffract wind which in turn reduces the wind load on the supporting structure Horn Technology Community is the originator and master of fiberglass horn manufacturing The horns used in many W ET Series Il and R Series loudspeakers are constructed as one piece precision waveguides by hand crafting on a precision mold using 100 hand laminated fiberglass Balsa wood is embedded and laminated into the fiberglass at strategic points to create extremely strong double wall constr
54. nearby monitor speaker or headphones or just shut the window For very long pools an announcer with a wireless mic at the far end of the pool may hear an announcer s echo See Page 9 for a discussion of this problem To minimize neighborhood spill mount the loudspeakers as high as possible and aim them downward towards the pool Alternate Loudspeaker Choices and 70 100 Volt Systems The R 5 loudspeakers in this example will provide adequate level for most announcing requirements and their musical sound quality is excellent For rock n roll levels add Community s R 5SU Bs for extended low frequency response R 5 Series loudspeakers are available in 70 100 volt versions for the required long cable runs as used in this example Community R Series Application Guide Page 44 R SERIES LOUDSPEAKERS USED IN THIS DESIGN Qty Model Comments R 5 94T Z For coverage of entire pool area System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 45 INDOOR ICE RINK 1 CEILING DISTRIBUTED SYSTEM ON ROOF BEAMS Drect SPL dB Mee 97 53 Colors show sound level variation in audi ence areas Concessions and other ar eas will also receive sound not shown DISCUSSION Ice Rink Acoustics Designing a successful sound system for an indoor ice rink is a major challenge Most if not all surfaces are hard and the typical facility has little or n
55. o absorption material to quiet the reverberation This makes it difficult to design a system with good voice intelligibility Also patrons commonly want the system to be loud and musical for sporting events Although it s easy to design a loud system the facility acoustics make it difficult to achieve the musical goal O ne way to help meet these challenges is to specify absorption material to improve facility acoustics Absorption material can be sprayed onto the ceiling and girders and absorption panels can be installed on the walls General System Design Concepts There are two keys to improving intelligibility and getting good musical sound quality in a space like this First aim the loudspeakers at the listeners and as much as possible keep the sound away from the walls floor and ceiling Community R Series loudspeakers can help in this goal because they provide excellent pattern control Second to the extent possible keep the loudspeakers near the listeners This improves the direct reverberant ratio which improves intelligibility Community R Series Application Guide Page 46 Distributed C eiling System A distributed system although not the lowest cost design offers the best way to achieve these goals It puts the loud speakers as close as possible to the listeners and aims them directly at the listeners away from the walls and ceiling This design has three rows of loudspeakers facing downwards covering the floor and t
56. on scale lower cost higher cost Community R Series Application Guide Page 53 WAREHOUSE OR LARGE RETAIL STORE DISTRIBUTED LINE SYSTEM Warehouse Length gt 360 feet W idth gt 160 feet DISCUSSION Warehouse Acoustics and Layout A large warehouse or retail store may have very little acoustic treatment This means reverberation will be high The size of a space like this and the noise of fork lift traffic and conveyor systems add to the challenge of providing good voice in telligibility These challenges are best met with a distributed loudspeaker system However in a warehouse shelving may be very tall and aisles may be very narrow Inventory on the shelving may block sound from the loudspeakers so that it doesn t reach adjacent aisles The only solution to this problem is to add more loudspeakers so that every aisle is covered In a retail store shelving may not be as high to allow customers to reach products they want to buy In the case of a hardware store or home center some merchandise may be reachable only by a ladder but it s unlikely that shelves will be as tall as those in a true warehouse Community R Series Application Guide Page 54 Distributed Line vs Distributed Ceiling System A distributed system offers the best way to cover a Space like this It puts the loudspeakers as close as possible to the listeners and aims them away from the walls and ceiling A distributed ceiling
57. or image R1 for mid throw cluster for the coverage left hand pole A listener at Point A will hear an echo from the right hand cluster R2 for long throw coverage DISCUSSION Community does not recommend a split cluster system of this design because it is very difficult to avoid artificial echoes Some times however it s just not possible to cover an entire ball park from a single loudspeaker location and there aren t enough loudspeaker locations to allow a proper distributed system design In this case a split cluster design may be the only solution The problem with this design is the artificial echoes that will be created in most locations Any listener that is 35 to 70 feet 11m 21m farther from one cluster than the other will hear an echo For example consider a listener at Point A Typically this listener might be 50 feet 15m from the left cluster and 200 feet 60m from the right cluster Since sound travels 1100 feet per second 335m sec the listener at Point A hears the sound from the right cluster 136 msec after he hears the sound from the left cluster This long delay will produce a distinct echo even if the sound from the right cluster is as much as 10 dB lower in level than the sound from the left cluster Community R Series A pplication Guide Page 16 N ot all listeners will hear this kind of echo For example listeners near the center of the bleachers or the center of the field will be equidistant fro
58. p in this goal because they provide excellent pattern control Second to the extent possible keep the loudspeakers near the listeners This improves the direct reverberant ratio which improves intelligibility Community R Series Application Guide Page 50 Point Source System A point source system Is usually the lowest cost option for any facility The point source system in this example will pro vide ample level and excellent musical sound quality with acceptable voice intelligibility In comparison the C eiling D istrib uted design Indoor Ice Rink System 1 will provide better voice intelligibility and more flexibility for multipurpose use at somewhat higher cost M ulti Purpose U sage The center mounted loudspeakers will provide adequate floor coverage for non ice rink usage but this system is not designed for uses where an audience is sitting in chairs on the floor Alternate Loudspeaker Choices and 70 100 Volt Systems The R2 loudspeakers used in this example are high power devices that can easily produce rock n roll levels in large gymnasiums W hen level requirements are lower consider the Community R1 loudspeaker series which offers excellent pattern control at a lower price Add R2SUBZ loudspeakers for extended low frequency response when students want rock n roll musical performance Mount the R2 subwoofers over the audience seating areas and apply signal delay to synchronize the R2SUBZ s output with th
59. r buildings It s also possible that an announcer in the press box will hear an echo of his or her voice And It s likely that an announcer on the field will hear a confusing echo See Page 9 for a discussion of these problems Field Coverage and Neighborhood Spill This design provides some field coverage To improve field coverage add an additional R2 R2s are available in a variety of coverage patterns for this purpose Also due to the location aiming angle and power level of the loudspeakers Community R Series Application Guide Page 20 neighborhood spill may be greater Mount the loudspeakers as high as possible and aim them down at the bleachers and field to minimize this problem Alternate Loudspeaker Choices and 70 100 Volt Systems Upgrade this system to an R6 51 for high power music requirements Add an R6 Basshorn for extended low frequency response Most Community R Series and WET Series loudspeakers are available in 70 100 volt versions Higher powered versions like the R1 or R2 can utilize optional external 70 100 volt transformers This makes it possible to use smaller gauge wire to the loudspeaker location which helps reduce the overall system cost For high powered loudspeakers like this however it s best to locate the amplifier rack near the loudspeakers This keeps cabling short eliminates the need for high power 70 100 volt transformers and improves the overall system performance Of course the amplifier r
60. rage patterns to cover the audience evenly Point the loudspeakers at the listeners and away from walls and ceilings or outdoor obstructions In outdoor applications loudspeakers may be far enough apart to create artificial echos in areas of overlapped coverage Ideally put all loudspeakers in a central location central cluster design or use a distributed system design to minimize this problem In any case minimize overlap when loudspeakers are separated by more than approximately 40 feet Choose power amplifiers large enough to provide the desired power output with enough headroom to avoid clipping Use a limiter and high pass filter to protect the loudspeakers Follow proper wiring design and adjust gains and levels to minimize hum and noise COMMISSIONING THE SYSTEM Commissioning is the process of optimizing the performance of the system after it has been installed There are several steps in commissioning including verifying the proper operation of each system component and adjusting system gains and levels The last step in system commissioning is known as system equalization or voicing Equalization is the process of adjusting the frequency response of the system to optimize voice intelligibility or musical sound quality or both Note that R Series loudspeakers are factory voiced to optimize their speech intelligibility and musical sound quality For this reason many designers find they can minimize overall system equalization and s
61. roll levels consider Community R 5 subwoofers R 5 models are available in 70 100 volt versions as used in this example Alternate Lower C ost Design for High School Swimming Pool The design example shown here is for a large competition swimming pool with two sets of bleachers This type of facility would be common for NCAA sporting events O lympic facilities and professional water sports In contrast a typical high school swimming pool is a smaller space with a single set of bleachers A good loudspeaker sys tem design for this kind of smaller swimming pool is similar to one half of the design shown for the competition pool For the smaller pool Community s R 5 94Z or TZ is a good choice for the bleachers and for the pool coverage R SERIES LOUDSPEAKERS USED IN THIS DESIGN pee a og R2 77Z For bleachers coverage fg R 5 661TZ For pool coverage System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 39 OUTDOOR SWIMMING POOL 1 DISTRIBUTED SYSTEM ON LIGHT POLES Colors show sound level variation in audience areas Pool house and other areas will also receive sound not shown DISCUSSION This is an excellent design for an outdoor swimming pool The loudspeakers are mounted on light poles on one side of the pool This keeps levels very even throughout the pool area improves intelligibility for announcements and min
62. roof of the press box is less than about 20 feet 6m above the heads of the nearest listeners the R2 loudspeakers used for the end zone and away team bleachers may be too loud in the home team bleachers Look for an alternate loca tion for these loudspeakers when this occurs Sometimes there s a light pole behind the press box This makes a good alternate location for the R2s Mount the R2s at least 20 feet 6m above the heads of the nearest listeners 30 feet or 9m is better and delay the remaining loudspeakers if necessary to avoid artificial echoes Field Coverage and Neighborhood Spill This system will have some field coverage from the loudspeakers aimed at the end zone and away team bleachers For additional field coverage add R2s at the end zone side of the press box aimed at the field R2 loudspeakers are available in several coverage patterns for this usage Community R Series Application Guide Page 24 There will be some neighborhood spill behind the end zone and away team bleachers To minimize this problem mount the R2s covering the end zone and away team bleachers as high as possible and aim them down at the bleachers Delay the other loudspeakers if needed to avoid an artificial echo Feedback Artificial Echoes and the Announcer s Echo This type of system should not produce artificial echoes Real echoes are still possible of course so try to aim the loud speakers away from any nearby walls or buildings An anno
63. shows skating rinks convention centers factories warehouses and portable sound systems They can complement Community W ET Series Il products for projects needing a combination of both longer and shorter throw applications Community R Series Application Guide Page 4 INTRODUCTION R Series Indoor Applications R Series and WET Series Il loudspeakers are great indoor loudspeakers These models are ideal for humidity prone environments like gymnasiums and swimming areas Selected models are available in specially designed indoor versions without the weather resistant grille W here likelihood of splashing indoor water park or physical abuse gymnasium is possible Community recommends the standard R Series model with the grille R SERIES FEATURES R Series products are entirely constructed of corrosion resistant materials like fiberglass powder coated steel or aluminum non metallic and carbon fiber using sophisticated technologies to ensure they will withstand exposure to harsh environmental conditions Weather Resistant LF Cones and HF Diaphragms All R Series models feature weather resistant LF cones and HF diaphragms Ferrofluid Most LF MF amp HF drivers use Ferrofluid in their voice coil gaps Ferrofluid provides improved heat transfer resulting in higher power handling reduced distortion from fluidic dampening of mechanical resonance and it seals the air gaps against corrosion and oxidation Driver Protection Fu
64. ssions stand For coverage of bleacher areas Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 49 INDOOR ICE RINK 3 POINT SOURCE SYSTEM AT ARENA CENTER Drect SPL dB mE ae oat meee a a ae e v we oe Colors show sound level variation in audience areas Concessions and other areas will also receive sound not shown DISCUSSION Ice Rink Acoustics Designing a successful sound system for an indoor ice rink is a major challenge Most if not all surfaces are hard and the typical facility has little or no absorption material to quiet the reverberation This makes it difficult to design a system with good voice intelligibility Also patrons commonly want the system to be loud and musical for sporting events Although it s easy to design a loud system the facility acoustics make it difficult to achieve the musical goal O ne way to help meet these challenges is to specify absorption material to improve facility acoustics Absorption material can be sprayed onto the ceiling and girders and absorption panels can be installed on the walls General System Design Concepts There are two Keys to improving intelligibility and getting good musical sound quality in a space like this First aim the loudspeakers at the listeners and as much as possible keep the sound away from the walls floor and ceiling Community R Series loudspeakers can hel
65. system would also work well in a space like this loudspeakers facing straight downwards A good choice for that type of system would be an R SCOAX as used in the Convention Center application on page 52 For this warehouse application however we have chosen an alternate design which uses four rows of horn type loud speakers facing downwards and outwards The design starts with two back to back lines of loudspeakers in the center and continues with two additional rows of loudspeakers at an appropriate distance from the center These outer rows must be delayed to match the arrival time of sound from the center rows This design uses fewer loudspeakers than a ceiling distributed system and the RMG 200A horn type loudspeakers provide good control over coverage while maintain ing a favorable direct reverberant ratio This design still faces the challenge of blocked sound from shelving that reaches near the ceiling The only solution to this problem is to add more loudspeakers To reduce cost consider using one or two RSH 462s depending on horizontal coverage needed in place of the RMG 200As to cover the open area top right of diagram R SERIES LOUDSPEAKERS USED IN THIS DESIGN RMG 200AT RMG 200AT For coverage of entire floor area System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 55 LARGE AIR INFLATED STRUCTURE POINT SOURCE SYSTEM
66. t speech intelligibility and great musical sound quality The RSH 462 is a good choice for paging sports announcing and other voice range usage The R6 51 is the right choice when patrons want full range music along with announcing Feedback Artificial Echoes and the Announcer s Echo There s little chance of feedback in this design because the loudspeakers are some distance from the announcer s micro phone There will be an announcer s echo for announcers located at least 35 to 70 feet 11m 21m from the loudspeaker This could happen at a tennis match See Page 9 for a discussion of these problems Neighborhood Spill The thin walls will allow sound to escape the structure Mount the loudspeakers as high as possible and aim them down at the field to minimize neighborhood spill Community R Series Application Guide Page 56 Alternate Loudspeaker Choices and 70 100 Volt Systems Add R2SUBZ or R6 BASSHORN loudspeakers for extended low frequency response Because of their power levels Community recommends that these loudspeakers be directly connected to their power amplifiers and not used on 70 100 volt lines R SERIES LOUDSPEAKERS USED IN THIS DESIGN RSH 462 R6 51 For coverage of entire facility System Cost Estimate Based on cost comparison scale lowest price highest price RSH 462 For coverage of entire facility System Cost Estimate Based on cost comparison scale lower cost
67. th a secondary means of attachment such as a safety cable In fact some local building codes and other regulations may require safety cables chains or other secondary supports due to seismic concerns excessive wind loads etc Be aware that safety attachment points should not be located at insert points on opposite sides of the cabinet in such a manner that they present a significant force that pulls the insert points away from each other All safety cables chains or other restraining hardware shall be installed so that the line is taut and positioned to minimize dynamic loading falling bouncing Swinging etc in the event that the loudspeaker s primary mount fails Community does offer in its catalog forged rated eyebolts intended for rigging loudspeakers However these eyebolts are not rated for outdoor use and the shank is too long for the threaded inserts on R 25 and R 5 loudspeakers This length limitation does not apply to the R1 and R2 loudspeakers Using an eyebolt with too long of a shank will not permit the eyebolt shoulder to properly seat against the exterior of the cabinet Installers will need to procure appropriate hardware made from the appropriate material and shank length to meet the needs of each application In some cases forged overhead rated shoulder eyebolts may be used as attachment points on the cabinet for safety cables with some restrictions The eyebolt must be screwed in and firmly seated do not over tighten with t
68. the loudspeaker The grille is not designed to withstand such things as being directly sprayed from a hose e lf you use any hardware in place of the supplied steel screws bolts nuts and washers supplied it should also be made of corrosion resistant properly rated steel e Always use outdoor rated cable Always seal connections in a weather tight electrical box Community recommends periodic inspections of installed rigging hardware to discover and repair any unexpected corrosion or damage IMPORTANT If the above instructions are not observed the weather resistant integrity of an R Series loudspeaker can be compromised This can result in damage to or failure of the hardware or internal components NOTICE STAINLESS STEEL GRILLE AND YOKE CORROSION R Series stainless steel yokes and grilles may show surface corrosion when exposed to marine or other corrosive atmospheres This corrosion is primarily a cosmetic problem and does not present an immediate hazard As an option Community offers higher grade 316 alloy stainless steel grilles and yokes for R Series and W ET Series Il products Contact the factory for pricing and delivery information ARTIFICIAL ECHOES Echoes Normal and Artificial Outdoors it s common for sound to reflect off a wall or building If a listener hears this reflection at least 35 to 70 milliseconds depending on level after the original sound they will perceive it as an echo It s possible to create an
69. this problem First mount the loudspeakers in positions that prevent a lis tener from hearing two loudspeakers at once The best way to achieve this is to mount the loudspeakers high in the air and point them downwards Second mount the loudspeakers close together so that if a listener can hear two loudspeak ers the second loudspeaker is no more than about 50 feet 15m farther away from the first loudspeaker Community R Series Application Guide Page 58 An alternate design for the circle area would place the loudspeakers on light poles around the outside of the circle facing inwards Avoid this design if possible because listeners near the outside of the circle will almost certainly hear several loudspeakers resulting in multiple artificial echoes For the road approaching the circle area put R SHPT on the light poles facing downwards and outwards away from the circle Add progressive delay to these loudspeakers to synchronize the sound with spill from the circle An announcer or performer in the center of the circle will not hear an artifical echo so this is a good design for outdoor performances Neighborhood spill from this system will be minimized if the loudspeakers are placed high on the poles and pointed downwards to cover only the public areas For the central area avoid placing the speakers higher than 40 feet 12m to maintain a natural sound for performers Alternate Loudspeaker Choices and 70 100 Volt Systems Add R2SUBZ lo
70. till achieve excellent voice intelligibility and musical sound quality W hen equalizing an R Series loudspeaker system the following points should be kept in mind to achieve the best results and to avoid damaging the drivers 1 Use only small amounts of equalization In particular do not boost frequencies by more than about 3 dB W hen cutting frequencies more than 3 dB of attenuation is OK Bear in mind that extreme frequency cuts will usually result in less than optimum performance 2 Do not attempt to boost any frequencies below 100 Hz with a graphic equalizer Note that with the recommended high pass filter moderate amounts of boost from a simple bass control are acceptable Community R Series Application Guide Page 10 THROW DISTANCE CHART SpuDA p 5340au 0 papunos spajja WuaydsouND ou YIM TdS YAP 96 wzgl i SpA olz E Wasis woy a ABuYypasnoo4 i Z9t HSH 3 wes Sp og el JBWWOJONG OO WasAs woy Shue aaI0A OP x 0S LWO0ZOINY D wes Sp gg wass uoy a us BIO Op OS WOOZOWY re wzgl SPA OSL We SAS WOYSSEG O08 X 09 wWoYsseg oy 5 WELL SPA OBL wasis afues iny ABM OLX 05 dINVISLS 9Y wg spA gz Wwajshs Jajoomgng OBL 09 Jansz Wig SPA OL wasis JajoomMans O08 OSE zase Weg SpA Qs moy wnipaw Aem gp 0r 08 2p wgg sp ga MOU POUS ABM wigg Sp og Monn WOYs jequewUWwASe en e LO x 06 09 Zb69 2H wes SPA 08 MOJ umpe jPOLSWWASE AEM Of O
71. ty R Series Application Guide Page 32 Download the FORECASTER Ceiling System Program from the CLOUD Series product page at www CommunityPro com R SCOAX99T For coverage of all areas 70 100 volt transformer included System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 33 HIGH SCHOOL GYM 2 SIMPLIFIED DISTRIBUTED SYSTEM ON CEILING GIRDERS Colors show sound level variation in audience areas Court floor and other areas will also receive sound not shown R2 77Z R 5COAX99 R2SUBZ optional DISCUSSION Gymnasium Acoustics Designing a successful sound system for a school gymnasium is a major challenge Most if not all surfaces are hard and the typical gym has little or no absorption material to quiet the reverberation This makes it difficult to design a system with good voice intelligibility Also students commonly want the system to be loud and musical for their sporting events and pep rallies Although it s easy to design a loud system the gymnasium acoustics make it a challenge to achieve the musical goal One way to help meet these challenges is to specify absorption material to improve gymnasium acoustics Absorption material can be sprayed onto the ceiling and girders and absorption panels can be installed on the walls high enough to be out of the way of basketballs or volleyballs General System Desig
72. uctions which damp vibrations providing clean resonant free sound In compact R Series models the horns are constructed of high density polyethylene with reinforcing ribs to dampen vibrations Perforations in the horn reduce reflections from the LF driver while still providing optimum pattern control and acoustic loading for the high frequency driver Weather Stop Grille Each enclosure is fitted with Community s proprietary W eather Stop protective grille The grille consists of an external perforated powder coated steel panel followed by a layer of open cell foam and an inner layer of fine mesh plastic This grille assembly prevents water intrusion while providing a high degree of acoustic transparency Powder C oated Steel Hardware Most hardware and fasteners are made of corrosion resistant powder coated steel or stainless steel Input Cables To help maintain its weather resistance properties there are no connectors on an R Series loudspeaker Instead input is via an attached 12 ft 3 6 m 16 2 SJO W type neoprene jacketed cable rated for outdoor use with a weather tight gland nut Community R Series Application Guide Page 5 INTRODUCTION Envirotech Technology All internal circuitry is protected from the elements with our proprietary Envirotech coating which seals sensitive electronic components against the effects of moisture and corrosion High Performance Crossovers and Autoformers R Series models feature hig
73. udspeakers for extended low frequency response This design uses T model loudspeakers which include 70V 100V autoformers to reduce line losses and allow smaller gauge wire R SERIES LOUDSPEAKERS USED IN THIS DESIGN R SHP Qty Model ra R 5H PT For traffic circle area R 5H PT For pedestrian walk way System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 59 Community Community Professional Loudspeakers 333 East Fifth Street Chester PA 19013 4511 USA TEL 1 610 876 3400 1 800 523 4934 FAX 1 610 874 0190 email tagteam communitypro com www communitypro com RSA G 081108
74. uncer in the press box will be near the loudspeakers and should not hear an artificial echo If feedback is a prob lem teach the announcer to close talk the mic or just shut the window An announcer on the field however will hear a confusing announcer s echo See Page 9 for ways to minimize this problem As a lower cost alternative design substitute Community s R 25 94TZ for the R 5 94TZ This loudspeaker will cover the press box audience areas well at a lower level than the R 5 94TZ Alternate Loudspeaker Choices and 70 100 Volt Systems Add R2SUBZ loudspeakers for extended low frequency response Most Community R Series and W ET Series loudspeak ers are available in 70 100 volt versions Higher powered versions like the R2 can utilize optional external 70 100 volt autoformers Use these transformer coupled versions if the electronics rack is in a remote location R SERIES LOUDSPEAKERS USED IN THIS DESIGN R2 94Z For coverage of the far areas of the home team bleachers R2 52Z For coverage of the end zone and away team bleachers R 5 94TZ For coverage of the home team bleachers center areas System Cost Estimate Based on cost comparison scale lower cost higher cost Community R Series Application Guide Page 25 LARGE FOOTBALL FIELD 2 POINT SOURCE SYSTEM AT END ZONE Colors show sound level variation in audience areas Field press box and other areas will also receive sound not shown
75. wo rows of loudspeakers angled slightly outwards covering the bleachers areas Note the extra loudspeakers covering the concessions area at one end of the floor M ulti Purpose U sage Small Arena An ice rink like this may be a multi purpose arena Different floors are installed for many different kinds of events These may include ice hockey arena football musical concerts conventions with display booths and rodeos and circus perform ances For non sporting events a portable stage may be brought in and placed at one end of the arena floor To minimize feed back provide switches to turn off loudspeakers pointed at the stage location s Also consider a switch to turn off the loudspeakers over the floor This keeps reverberation down when there s no need for floor coverage Alternate Loudspeaker Choices and 70 100 Volt Systems Add R2SUBZ loudspeakers for extended low frequency response when patrons want rock n roll musical performance R 5 loudspeakers are available in 70 100 volt versions as used in this example However if wire runs are short enough it may be possible to use standard versions at a slightly lower cost Choose amplifiers that are rated for the resulting very low impedance load R SERIES LOUDSPEAKERS USED IN THIS DESIGN R 5 94Z For coverage of bleacher areas R 5 99Z For coverage of ice rink floor and concessions stand System Cost Estimate Based on cost comparison scale lower cost

R-Series Application Guide - Community Professional Loudspeakers

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