Infinity Prelude MTS Subwoofer Speaker
Contents
1. Owner s Guide PP pp PRELUDE MTS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN WARNING SHOCK HAZARD DO NOT OPEN AVIS RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR CUIDADO PELIGRO DE CHOQUE ELECTRICO NO ABRIR CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL THIS INFINITY PRODUCT ISDESIGNED FOR 120 VOLT USE ONLY FOR DETAILED SAFETY PRECAUTIONS PLEASE SEE FOLLOWING PAGE IN THIS OWNER S MANUAL FOR IMPORTANT SAFETY INSTRUCTIONS The lightning flash with arrowhead symbol within an equilateral triangle intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the product L clair avec le symbole de la fl che plac dans les limites d un triangel quilat ral est pr vu pour avertir l utilisateur de la pr sence de tension dangereuse non isol e dans l enceinte du produit qui pourrait amp re d une importance suffisante pour pr senter un risque d lectrocution aux personnes Le point d exclamation dans un triangel quilateral est pr vu pour a2. 80Hz 3dB 30Hz 80Hz 1 5dB 850 watts continuous 2 600 watts peak 196 80Hz 20 x 9 1 2 x20 1 2 508mm x 241mm x 521mm 20 x 13 x20 1 2 including foot 508mm x 330mm x 521mm Prelude MTS WB Wall Bracket for Tower Prelude MTS F S Floor Stand for Tower Infinity continually strives to update and improve existing products as well as create new ones The specifications and construction details in this and related Infinity publications are therefore subject to change without notice PRELUDE MTS R A B 0 5 Measurement Template Deli Er 2 ai E 5 E T 58 a 212 14 Laval 16 20 7122 24 JB 35 3640 43 4B 4852 8358 Ti 7780 B5 BD 95 100Hz Frequency Frequency Hz Level dB W idth R A BOS Measurement Template age s 5 B 7 a B 10 4 12 Leyel 16 yn ta 2122 24 26 3 Mat 43 45 4952 6 63 66 T2 85 BO 35 100Hz Frequency Frequency Hz Level W idth_ PRELUDE MTS 5 Measurement Template a d d k o ap Laval 16 20 2122 24 26 30 35 3540 43 46 4952 58 8358 Ti 7780 B5 90 95 100Hz Frequency Frequency Hz Level dB Width amp RABOS Measurement Template Level 16 2022122 24 26 30 25 3540 43 46 4952 6308 72 7780 85 90 95 100H2 Frequancy Frequency Hz Level dB W idth PRELUDE MTS R A B O S Measurement Template E a
3. Infinity has developed two ways to solve most room generated problems The first is its proprietary Room Adaptive Bass Optimization System With a single band of parametric equalization the Prelude MTS can be adjusted to tame any problematic room bass resonances below 80Hz There is a completely different set of room related problems that has to do with loudspeaker directivity and that can affect the reproduction of mid and high frequencies One characteristic of forward facing loudspeakers 15 that the sound output lessens as one moves away from the principal axis This happens both horizontally and vertically and t means that radiated sounds that PRELUDE MTS reflected from the floor ceiling and side walls will be lower PRELUDE MTS SUBWOOFER in amplitude than direct forward sound This is usually a good thing But if the dispersion characteristics of the loudspeaker Bracket 1 are different at various frequencies the sound quality of the reflected sounds will be very different both from each other and from the first i e direct sound The ears don t ignore these differences they perceive them as coloration or as sound quality that s been degraded The Prelude MTS has been carefully Phillips designed to maintain a directional pattern that is similar at every 10 32 important angle on and off axis The positive result is that both Machine Screws 4 direct and reflected sounds arriving at the listeners ears have
4. 4 d k ap 20 2123 94 26 aa 35 3540 43 46 4957 sa 6356 Ti 7780 B5 50 95 100Hz Frequency Frequency Hz Level W idth R A B O S Measurement Template a eo ee eee Laval 18 202122 24 3 25 3840 43 46 40 52 58 68398 72 77BD B5 BO 95 100H2 Frequency Frequency Hz Level dB Width 9 PRELUDE MTS NOTES PRELUDE MTS Qo Infinity A Harman Intemational Company 2000 Infinity Systems Inc 250 Crossways Park Drive Woodbury NY 11797 USA 800 553 3332 USA Only www infinitysystems com Trademarks of Dolby Laboratories THX is a registered trademark of Lucasfilm Ltd DTS is a registered trademark of Digital Theater Systems Inc BASH is a registered trademark of Indigo Corporation Infinity is a registered trademark of Infinity Systems Inc Printed in USA 1 00 Part No 335060 001
5. transcends this pattern its performance so remarkable its design so stunning its technology so advanced it can truly be described as revolutionary The new Infinity Prelude MTS loudspeaker system 15 an elegant case in point The Prelude MTS system 15 a 4 way loudspeaker with ts mid bass midrange and high frequency driver array mounted atop a 12 850 watt powered subwoofer Outer beauty radiates from a choice of polished wood veneers and a brushed anodized aluminum enclosure that would make an old world furniture craftsman proud Its true splendor and magnificence though come from the inside With its proprietary Ceramic Metal Matrix Diaphragms powerful proprietary BASH amplifiers and sophisticated yet refined dividing networks the Prelude MTS will breathe life into any musical or cinematic performance and touch the soul of the listener The Prelude MTS is the consummation of Infinity s quest to apply science in the service of art The Prelude MTS system incorporates several innovative technologies that when implemented by exceptional engineering talent after hours upon hours of subjective listening evaluations result in a loudspeaker that realistically and accurately reproduces the signal source with minimal distortion and coloration Ceramic Metal Matrix Diaphragms C M M D For decades loudspeaker engineers have known that the ideal transducer should be stiff yet light and have high internal damping damping
6. END TIGHTEN TERMINALS SET BASS MODE TO SECOND SUBWOOFER TO POSITION 1 NO STRIPE a w aco XY Connector Q SET SWITCH ON BOTTOM OF TOWER TO FULL RANGE CAUTION AC FUSE ATTENTION 6A 120V ONE CHANNEL SHOWN PROCESSOR FRONT CHANNEL OUTPUT BLACK AMPLIFIER INPUT SPEAKER OUTPUT SUBWOOFER LFE OUTPUT Q LOOSEN TERMINALS R 0 INSERT BARE END TIGHTEN TERMINALS SET BASS MODE TO POSITION 1 NO STRIPE Q SET SWITCH ON BOTTOM OF TOWER TO FULL RANGE O CAUTION FUSE ATTENTION 6A 120V PRELUDE MTS ONE CHANNEL SHOWN BLACK RECEIVER LOOSEN TERMINAL SUBWOOFER SPEAKER INSERT BARE END TIGHTEN TERMINAL SET BASS MODE NO STRIPE TO POSITION 2 Winfinity PRELUDE MTS BUBWOOFER O SET TOWER SWITCH A En POSITION TO HIGH PASS ATTENTION After correctly connecting the Prelude MTS and verifying that both the subwoofer and tower portions are playing it is time to optimize the system for your particular listening room Final Positioning Earlier you placed the loudspeakers in their general location Finding the exact location for optimum performance sometimes only involves moving the spea
7. If the plug should still fail to fit contact your electrician to replace your obsolete outlet Do not defeat the safety purpose of the polarized plug 13 Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them paying particular attention to cords at plugs convenience receptacles and the point where they exit from the product 14 Nonuse Periods The power cord of the product should be unplugged from the outlet when left unused for long periods of time 15 Outdoor Antenna Grounding If an outside antenna or cable system is connected to the product be sure the antenna or cable system is grounded so as to provide some protection against voltage surges and built up static charges Article 810 of the National Electrical Code ANSI NFPA 70 provides information with regard to proper grounding of the mast and Supporting structure grounding of the lead in wire to an antenna discharge unit size of grounding conductors location of antenna discharge unit connection to grounding electrodes and requirements for the grounding electrode See Figure A 16 Lightning For added protection for this product during a lightning storm or when it is left unattended and unused for long periods of time unplug it from the wall outlet and disconnect the antenna or cable system This will prevent damage to the product due to lightning and power line surges 17 Po
8. Of course you may fine tune the Subwoofer gain control to your listening preference This concludes the R A B O S process It is recommended that you remove the battery from the RSLM Store the Test CD Width Selector Adjustment Key and the RSLM together PRELUDE MTS MAINTENANCE AND SERVICE The Prelude MTS Subwoofers have an oiled finish Cleaning should be done with an untreated dust cloth Do not use conventional furniture waxes and polishes which are not designed for oiled finishes If touch up is necessary or the finish appears to be drying out the surface may be with a commercially available oil finishing preparation Do not use any solvents on the finish The Tower may be cleaned using a soft cloth dampened with water only to remove fingerprints or to wipe off dust The grille may be gently vacuumed Stains may be removed with an aerosol cleaner following its instructions Do not use any solvents on the grille All wiring connections should be inspected and cleaned or remade periodically The frequency of maintenance depends on the metals involved in the connections atmospheric conditions and other factors but once per year is the minimum If a problem occurs make sure that all connections are properly made and clean If a problem exists in one loudspeaker reverse the connection wires to the left and right system If the problem remains in the same speaker then the fault is with the loud speake
9. RIGHT LEFT SIDE FRONT A FRONT a CENTER 0 0 LEFT RIGHT TV RIGHT SIDE CONTROLS AND CONNECTIONS Subwoofer Rear Panel Vinfinity PRELUDE 5 SUBWOOFER 120V 60 HZ 6A SPEAKER CAUTION 1 LINE LEVEL BASS MODE O LEVEL O 9 O ACFUSE ATTENTION IN 123 eur 6A 120V o e Subwoofer Front Panel R A B O S Controls O Line Level Input Connector Center Frequency Adjustment ine Level Output Connector QR AB 0 5 Level Bass Mode Switch Ata Bandwidth Adjustment peaker Level Input Q AC Cord Input Subwoofer Level Control PRELUDE MTS The Infinity Prelude MTS offers unprecedented flexibility for connecting the system to any type of audio or home theater system Consult the table at right to determine which system description most closely matches your own then follow the hook up method corresponding to that system If none of these system configurations seem to match yours consult your dealer or Infinity customer service for direction on how best to hook up your system For Methods 2 3a 3b and 4 make sure all bass management features are properly set The Audio channels should all be set to Small High Pass and the subwoofer set to On BLACK Q LOOSEN TERMINALS INSERT BARE END TIGHTEN TERMINALS SET BASS MODE TO POSITION 3 NO
10. STRIPE Q SET SWITCH ON BOTTOM OF TOWER TO HIGH PASS BLACK LOOSEN TERMINALS INSERT BARE END TIGHTEN TERMINALS SET BASS MODE TO POSITION 2 NO STRIPE O SET SWITCH BOTTOM OF TOWER TO FULL RANGE ONE CHANNEL SHOWN PREAMP OUTPUTS PRELUDE MTS IN System Type Connection Methods 2 Channel receiver or integrated amplifier that has no subwoofer output or Pre out Main In connectors 1 2 Channel receiver or integrated amplifier with preamp output and input connectors 2 2 Channel system with separate preamplifier and power amplifier 2 Dolby Pro Logic with THX Dolby Digital or DTS receiver with a filtered subwoofer or LFE output connector 3a Dolby Digital or DTS processor with separate power amplifiers or multichannel amplifier 3b Non THX certified Dolby Pro Logic receiver with full range subwoofer outputs 4 ONE CHANNEL SHOWN AMPLIFIER RECEIVER SPEAKER OUTPUTS En 120V 60 HZ 6A CAUTION FUSE 6 120V 123 Infinity PRELUDE MTS SUBWOOFER SPEAKER 120V 60 HZ 6A CAUTION 6A 120V AMPLIFIER RECEIVER SPEAKER OUTPUTS ONE CHANNEL SHOWN BLACK SURROUND RECEIVER LOOSEN TERMINALS SUBWOOFER LFE FRONT SPEAKER OUTPUT OUTPUTS INSERT BARE
11. is a material s ability to absorb energy Infinity s C M M D transducer is a significant advance in transducer technology Ceramic a class of material new to loudspeakers offers better performance than that of other materials Ceramic is stiffer than metals and lighter than plastics and typical composite materials it also offers improved damping These ceramic based transducers take us a giant step closer to the ever elusive ideal transducer In tweeters C M M D technology offers stiffness and damping superior to that of traditional metals and soft dome materials In woofer and midrange applications it offers accurate pistonic operation over the entire frequency range of the driver completely eliminating coloration due to cone breakup and dramatically reducing distortion And when ceramic metal matrix transducers are exposed to moisture sunlight or extreme temperatures their performance does not deteriorate Transducers In addition to ceramic diaphragms all the transducers incorporate magnetic shielding and rigid cast frames that through our FEA computer modeling and scanning laser vibrometer measurements have been optimized to reduce resonances This ensures minimal distortion and incomparable performance The 12 low frequency transducer is the embodiment of uncompromised driver design The ceramic metal matrix cone is attached to a rigid cast aluminum frame through compression molded butyl rubber surround The motor
12. is how they should be during this procedure Try to minimize ambient noise while running tests Turn off all major appliances and any air conditioning or furnace fans These can create significant subsonic noise that may be barely perceptible but which can wreak havoc on low frequency measurements Critical information is highlighted with this mark Helpful hints are marked with this symbol G x PRELUDE MTS Contents of the R A B O S Test CD Title Track Title Welcome 32 Quick Retest 80Hz Set System Test Level 33 Quick Retest 77Hz Set Subwoofer Test Level 34 Quick Retest 72Hz 100Hz Test 35 Quick Retest 66Hz 95Hz Test 36 Quick Retest 63Hz 90Hz Tes 37 Quick Retest 56Hz 85Hz Test 38 Quick Retest 52Hz 80HzTes 39 Quick Retest 49Hz 77HzTest 40 Quick Retest 46Hz T2HzTes 4l Quick Retest 43Hz 66Hz Test 42 Quick Retest 40Hz 63HzTes 43 Quick Retest 38Hz 56Hz Test 44 Quick Retest 35Hz 52HzTes 45 Quick Retest 30Hz 49HzTest 46 Quick Retest 26Hz 46HzTes 47 Quick Retest 24Hz 43HzTest 48 Quick Retest 22Hz 40HzTes 49 Quick Retest 21Hz 38Hz Test 50 Quick Retest 20Hz 35Hz Tes 51 Final System Level Adjustment 30Hz Test 52 Final Subwoofer Level Adjustment 26Hz 53 Wide Band Pink Noise Left 24Hz Test 54 Wide Band Pink 5 R 22HzTes 55 Wide Band Pink Noise Right 21HzTest 56 Wide Band Pink Noise L R 20Hz Tes 57 Wide Band Pink Noise Uncorrelated Intro to Quick Retest 58 1 to 4kHz Pin
13. points You may find it helpful to move the RSLM vertically Dips be oriented in any axis The position that restores the level to about that of the adjacent test points is your new test position 2 Reset the test level Return to the section Setting the Subwoofer Test Level on page 13 Perform the procedure as described 3 Repeat the measurements Now that you are familiar with the measurement process you can go much faster by using Tracks 27 50 These tracks contain all the test tones necessary for measurement However each test is only about three seconds and there is no frequency announcement The first test is 100Hz J ust place each test mark in order until finished Connect the dots Your second measurement will no longer exhibit the deep response dip However the peak will still be evident Without the influence of the response dip the amplitude and center of the peak may have changed Compare your new data to the examples given in this section of the manual Follow the instructions for the example that most closely matches your new measurement Example 4 Narrow Response Narrow Response m hh kbh i T 4D X3 4A GR ONT Oe TJ TAO ND Mi Although it looks as though this speaker is quite bass deficient this is actually indicative of a single very narrow peak in excess of 10dB high Apply the Width Selector as described above Align the center line of the Selector over th
14. this is how the subs are packaged For some rooms however the system may perform better with the woofers facing the inside Feel free to experiment Surround Channels in a Home Theater System When used as part of a Dolby Pro Logic THX or discrete 5 1 channel home theater system the surround speakers should be placed at the sides of and directed toward the main listening area See Figure 2 If there are several rows of seating place the speakers as described above perpendicular to or slightly behind the last row of seating When used as part of a 7 channel music or home theater system place the side speakers at the sides of and directed toward the main listening area If there are several rows of seating place the speakers as described above perpendicular to the middle row of seating The rear speakers should be placed on the rear wall facing the front of the room Each rear speaker should be about 1 3 of the way into the room but never to the outside of the listening area See Figure 3 As mentioned earlier Prelude MTS offers several ways to fine tune the system for optimum performance in any listening room These techniques as well as Infinity s exclusive R A B O S system will be discussed in detail later in this manual 6 PRELUDE MTS LEFT SURROUND FIGURE 3 LEFT RIGHT CHANNEL 7 CHANNEL T FRONT__ FRONT LEFT RIGHT CENTER
15. while performing measurements The sound level meter provided is used to acquire the information needed for adjustments You Will create a response plot on the Measurement Template Using the Width Selector you will then determine the appropriate equalizer settings The Key is used to adjust the parametric equalizer built into each Prelude subwoofer After adjustment the test sequence is repeated to confirm your settings The R A B O S Goal It is a fact of audio that what we hear at low frequencies is determined as much or more by the listening room than by the loudspeaker itself Placement of the loudspeakers and listeners and the acoustical characteristics of the room surfaces are all important determinants of bass quantity and quality In most practical situations there is little that can be done about this except for patient trial and error repositioning of the loudspeakers and listeners Usually the practical constraints of a living space and the impracticality of massive acoustical treatment mean that equalization is the only practical solution Professional sound engineers routinely employ sophisticated measurement systems and equalizers to optimize speakers to the installation This has never been practical for the home audiophile This is why R A B O S was created R A B O S enables you to identify the dominant low frequency response characteristic of your room Once you know the problem R A B O S provides the tools need
16. andwidth Selector Adjustment Key xe PRELUDE MTS Please read through this owner s manual completely before attempting to install or connect the speakers We understand that you may be anxious to play your new system so we have made every effort to simplify the installation and connections of the Prelude MTS However there are still several times when you will be asked to make a hookup or adjustment decision based upon the details of your particular system and listening room Your patience will be rewarded with a loudspeaker system that 15 optimized to your particular listening room in order to deliver the best performance possible Before proceeding you should decide how you would like to install the tower portion of the Prelude MTS system The tower may only be attached to the powered subwoofer mounted to our optional floor stands or mounted on the wall using the optional wall brackets In all cases it is strongly recommended that two or three people install the tower to minimize the possibility of damage or injury Installing Feet Refer to Figure B as you perform the following steps 1 Open each accessory pack and locate the following items feet with spike round ends four locking nuts four nylon domes and one wrench 2 Lay each speaker on its side and locate the two threaded holes on the bottom 3 For carpets screw the round end of a foot into each hole and fully hand tighten a nut onto each one For hard surface flo
17. assembly incorporates a vented polepiece for maximum heat dissipation with negligible air turbulence The frame itself is also vented to further improve heat dissipation The motor structure uses a 35 edge wound copper voice coil for high power handling and minimal power compression To maximize system performance the flat spider assembly and the cone are mounted to different points on the fiberglass former increasing reliability and reducing distortion especially at high output levels extra thick top plate and dual magnet structure are utilized to allow for huge peak to peak driver excursions with significantly lower distortion and a more linear frequency response than is true of typical drivers When installed in its heavily braced and reinforced elliptical enclosure and coupled with a powerful 850 watt amplifier and Infinity s proprietary Room Adaptive Bass Optimization System R A B O S this 12 low frequency transducer allows the Prelude MTS system to deliver bass that will cleanly and naturally reproduce the lowest notes of a pipe organ or the loudest explosions from last summer s hottest action films Room Friendly Acoustical Design Driver quality is not the only requirement for exceptional performance Infinity s engineers understand that the room in which the loudspeaker is placed can greatly affect its performance To ensure that the Prelude MTS will sound exceptional in even the most unexceptional listening environment
18. at of the baffle PRELUDE MTS oo The Infinity Prelude MTS 15 designed to offer excellent performance in any listening room or home theater system However the following placement guidelines and suggestions will start you on your way to achieving optimum performance Remember these are guidelines We suggest you experiment with positioning the loudspeakers to determine their ideal placement in your particular listening room 2 Channel or Front Left and Right ina Home Theater System Generally the system should be placed with the tower section installed atop the subwoofer at least three feet away from the side walls In 2 channel applications the two speakers should be equidistant from your primary listening position We recommend that the angle formed between the speakers and the listening area be between 45 and 60 For example if the speakers are 8 apart your listening position should be 8 to 12 from each speaker See Figure 1 With wider speaker separations it may be advantageous to slightly angle the speakers aiming them toward the listening area When used as part of a home theater system you may find that you achieve excellent performance with the left and right speakers spread apart even further Feel free to experiment with the placement of the speakers to achieve the best possible sound in your listening room Normally it is recommended that the driver of each subwoofer face toward the outside and
19. ction 810 21 Electric Service Equipment Ground Clamps Power Service Grounding Electrode System NEC Art 250 Part H PRELUDE MTS PRELUDE MTS OWNER S GUIDE Table of Contents PRELUDE MTS a vw w 12 12 17 20 21 22 23 24 27 Caution Important Safety Precautions Technology Ceramic Metal Matrix Diaphragms C M M D Transducers Room Friendly Acoustical Design Completing the Experience Unpacking the Product Included Accessories Installation of the Prelude System Installing the Tower on Top of the Subwoofer Placement of the Components Controls and Connections Connection Methods 1 4 Room Adaptive Bass Optimization System R A B O S Contents of the R A B O S Test CD The R A B O S Sound Level Meter RSLM What You Measure What To Do Adjusting the R A B O S Equalizer Final System Balance Maintenance and Service Specifications R A B O S Measurement Templates Notes Infinity Prelude MTS This loudspeaker system represents a refinement of the principles that have guided Infinity s loudspeaker designs for more than 30 years Loudspeaker development 15 generally evolutionary process New models usually perform slightly better than the ones they replace Over time the subtle improvements add up and when the latest model is compared to a loudspeaker that is ten or twelve years old the disparity is unmistakable Every once in a while a loudspeaker 15 developed that
20. d ambient noise all add their part Determining the best width setting nearly always requires compromise Level This setting will define the amount level you want to reduce the peak in decibels The R A B O S level adjustment is limited to attenuation only and is adjustable from 0dB to 14dB After optimization the R A B O S equalizer will eliminate the largest low frequency peak therefore the broadband bass level can be increased without overpowering the midrange frequencies R A B O S applies this compensation automatically You will use the Width Selector as an aid in determining the correct level setting Place the Width Selector as described above and adjust it to the correct width Observe the first frequency point on the high frequency side of the peak that no longer follows the slope of the Width Selector In this example this is 56Hz Calculate the average level of the readings from 56Hz up to 100Hz that is 10 data points in this example 56Hz 9 63Hz 10 66Hz 72Hz 8 9 80Hz 85Hz 91 8 90Hz 10 95Hz 100Hz 10 9 11Hz 10 92 10 9 2 Whenever your answer has a remainder always round down disregarding the negative to the next whole number In our example you would enter 9 the attenuation field This may not be the best method in all cases The next section contains several other examples What You Measure What To Do As stated earlier itis not
21. d play Tracks 14 52Hz and 18 40Hz Press Play You will see a reading very close to what you had before Now slowly move the RSLM around the area if possible remaining within about a foot of the original test point As you move the RSLM watch the bar graph You will observe large level fluctuations Find a location for the subwoofer or a test location that raises the response at these frequencies You may find it helpful to move the RSLM vertically Dips can be oriented in any axis The position that restores the level to about that of the adjacent test points is your new test position 2 Reset the test level Return to the section Setting the Subwoofer Test Level on page 13 Perform the procedure as described 3 Repeat the measurements Now that you are familiar with the measurement process you can go much faster by using Tracks 27 50 These tracks contain all the test tones necessary for measurement However each test is only about three seconds and there is no frequency announcement The first test is 100Hz ust place each test mark in order until finished Connect the dots Your second measurement will no longer exhibit the deep response dips However the peak will still be evident Without the influence of the response dips the amplitude and center of the peak may have changed 4 Interpret the new data Compare your new data to the examples given in this section of the manual Follow the instructions for the exa
22. e center of the peak as shown in Figure 15 Now adjust the Selector until you have achieved the best fit The slider now points to the correct width setting In this example the frequency is 40Hz and the best fit width is 10 Fill in the Width and Frequency fields provided on the template Determine the appropriate level using the technique described earlier In this example 13dB is indicated Enter 13 in the field provided Skip to the Adjusting the R A B O S Equalizer section on page 20 Example 5 One or More Narrow Dips Example of two narrow dips muli X si E ai A is BO E NO Fip ae Jg Response dips can occur at any frequency sometimes immediately adjacent to the peak you want to correct In this example there are two such dips on either side of the peak Deep response dips such as these are caused by destructive wave interference Destructive interference dips occur only in one spot within the room It is not uncommon to completely eliminate their effect by moving the RSLM to a different location Note that this does not eliminate the dips We have simply moved away from them Sometimes only a few inches are required Do not attempt to correct this condition with equalization If you encounter dips like this take the following steps PRELUDE MTS 1 Select a new test position Cue the test track corresponding to the center frequency of the dip In the example in Figure 21 you woul
23. earlier In this example 9dB would be best Enter the level in the field provided Skip to the Adjusting the R A B 0 S Equalizer section on page 20 PRELUDE MTS Example 2 Two Response Peaks Two response peaks DI MOM ee Eo P Characterized by two response peaks approximately equal in amplitude and width This requires that you make a choice between the two peaks In situations like this the higher frequency peak will always be more audible and objectionable Response peaks below 45Hz unless extreme can actually be beneficial toward achieving visceral impact Perform corrections on the upper frequency peak Apply the Width Selector as described above Align the center line of the Selector over the center of the higher frequency peak Now adjust the Selector until you have achieved best fit The slider now points to the correct width setting In this example this is at 52Hz The best fit width is 28 Fill in the Width and Frequency fields provided on the template Determine the appropriate level using the technique described earlier This calculation will indicate a 8dB setting However this peak does not reach the 0dB level as the lower peak does Therefore a 8dB setting would be excessive The 52Hz peak Stops at 2dB Subtracting 2 from 8 yields the correct setting 6dB Enter 6 in the Level field Skip to the Adjusting the R A B O S Equalizer sectio
24. ed to optimize the low frequency characteristics of the speakers to the room they are in exactly as the professional sound engineers do it Performing R A B 0 S Tests These instructions assume you have already installed your Prelude speakers according to the information provided in the Owner s Guide It is also assumed that all equipment in your entertainment system is interconnected properly and is in good operating condition Preparations Before beginning R A B O S tests please check the following Make sure all three R A B O S controls on the Prelude MTS Subwoofers are turned fully clockwise Make sure the loudness contour if any on your receiver processor preamp is turned off Set the tone controls Bass and Treble to their center or flat positions Bypass all surround and effects features of your receiver processor preamp or set to Stereo Bypass If you are using a multichannel surround processor or receiver make sure all bass management features are properly set The Audio channels should all be set to Small High Pass and the subwoofer set to On You must have a CD player in the system A CD player remote control is quite convenient but not essential For best results it is recommended that all major furnishings are in place and that all doors and windows in the listening area are in their normal positions That is if you normally listen to music with all doors closed then this
25. ess Pause 11 Setting the Subwoofer Test Level 8 Each of the following test tracks is about one minute long This is normally much longer than required Press Pause II or advance to the next test as soon as you are ready This step will set the subwoofer levels for measurement purposes The objective is to scale the subwoofers output to make full use of the RSLM indicator range Scaling is optimum when a 0dB reading is observed on the highest peak without triggering the over range indication Later you will rebalance the subwoofers to the main speakers 4 Prelude subwoofers should be shipped with the three R A B O S controls O O set to fully clockwise positions and all measurements should be conducted with their level controls in this position Confirm this setting before you begin this test The gain control 9 should be set to the mid position 5 Cue Track 3 and Pause II Track 3 continuously steps through all subwoofer test tones for approximately 1 minute Each tone will play just long enough for the RSLM to give a stable reading 8 To get accurate measurements it is necessary to play the woofers quite loud The 0dB indication is about 94dB At this level frequencies below 100Hz can cause doors windows furnishings and other objects in the room to vibrate This frequently results in clearly audible buzzes and or rattles that come and go as each test tone plays Strong buzzes not only sound bad they ca
26. ill be off and one of the red LEDs in the bar graph will be illuminated indicating the relative sound level in decibels dB Over Range If the sound level exceeds the range of the meter 048 through 5 will all light simultaneously Low Battery When the battery voltage is too low for accurate measurements an LED at the bottom of the bar graph will be illuminated Replace the battery QD Do not attempt measurements when this light is on RSLM Placement Determine where in the room you are most likely to sit when listening to music or watching a movie This is where you will want to hold the RSLM during measurements The RSLM should be oriented so it can be easily read and held at your seated ear level during tests QD You must use this same position for all tests B The RSLM can be mounted on a standard camera tripod This will ensure the best results Initial System Level Setting The following steps will set the playback level of the system to the correct level for all tests that follow 4 Turn the system volume to minimum Cue the R A B 0 S Test CD to Track 2 and press Pause II This track will produce band limited pink noise in both the left and right channels Press Play B With the RSLM positioned as described above increase the system volume until the RSLM display indicates 10dB See Figure 6 RSLM indicating the correct system level to begin tests 10dB When you have completed this adjustment pr
27. k Noise Left Quick Retest 100Hz 59 1 to 4kHz Pink Noise L R Quick Retest 95Hz 60 1 to 4kHz Pink Noise Right Quick Retest 90Hz 61 1 to 4kHz Pink Noise Left R Quick Retest 85Hz 62 1 to 4kHz Pink Noise Uncorrelated Tracks 53 62 of the R A B O S Test CD are test tones that can be used for general diagnostics of your system They are not used for RAB O S settings THE R A B O S SOUND LEVEL METER RSLM The RSLM s a battery operated handheld acoustic measurement device specifically designed for Infinity R A B O S On the face of the instrument is light emitting diode LED bar graph that indicates relative sound level There are also indicators for power on out of range signals and a low battery 0 5 Sound Level Meter gonnen amp olnfinity PRELUDE MTS Power is switched on or off by pressing the button directly below the bar graph window When the unit is on one or more LEDS will always be illuminated The function of the LEDs is described in the following section RSLM bar graph indications On Measurement Over range Low Under range In range Battery Power On Low Signal This is indicated by the illumination of any LED on the bar graph If the sound level in the room is below the measurement range of the instrument a green LED near the bottom of the bar graph will be illuminated Normal Measurements When the sound level is within the range of the RSLM the green LED w
28. kers up to a few inches in any direction We urge you therefore to experiment with placement until your speakers deliver their full potential When the speakers are moved inward toward each other there 15 generally better focus of instruments and vocalists however moving the speakers too close together can reduce the spaciousness of the stage effect and you may need to experiment with the trade off between focus and imaging If your listening room 15 larger than average and your listening position 15 relatively far from the speakers wider placement of the speakers may be required PRELUDE MTS Room ADAPTIVE BASS OPTIMIZATION SYSTEM Infinity R A B O S is a simple to use yet sophisticated low frequency calibration system It is designed to work in conjunction with Infinity Prelude self amplified subwoofers Each Prelude subwoofer contains a parametric equalizer that you will adjust as indicated by the R A B O S test results Following these instructions you will optimize the Prelude subwoofers response characteristics to complement their environment This will dramatically improve the sound of your Prelude system The optimization process takes less than 30 minutes The R A B O S Kit Includes the Following Components Specialized Sound Level Meter Test CD Instructions Measurement Templates Width Selector Adjustment Key What R A B 0 S Does The Test CD provides specially designed signals you will use
29. mple that most closely matches your new measurement Example 6 Ideal Response Ideal response no EQ needed PRELUDE MTS If your test data looks similar to the example in Figure 22 you have a very favorable setup Skip to the Final System Balance section page 21 Adjusting the R A B O S Equalizer Now that you have performed the measurements and interpreted the data you have the information needed to adjust the subwoofer equalizers There are three equalizer adjustments on each Prelude subwoofer Left to right they are marked F frequency L level and W width Each control has 21 positions These are numbered from left to right Therefore Position 1 is the full counterclockwise position The following table illustrates all switch positions Position F Hz L dB W 1 CCW 20 14 1 4 5 2 20 13 9 5 3 20 13 5 7 5 4 21 13 1 10 5 22 12 7 12 5 6 24 11 7 16 5 7 26 11 0 20 5 8 30 10 2 23 9 35 9 5 26 10 38 8 9 28 11 40 8 3 29 5 12 43 7 9 31 13 46 6 4 34 14 49 44 39 15 52 2 9 41 5 16 56 1 9 43 5 17 63 1 1 45 18 66 0 5 46 5 19 72 0 0 48 20 71 0 0 49 21 80 0 0 49 5 You must use the R A B O S key to adjust these controls Always adjust both subwoofers together Using the adjustment key adjust the controls as indicated by the Measurement Template Each value shown in the table 15 represented by detents in the R A B O S cont
30. n cause measurement errors If you hear a buzz or rattle during this test it is highly recommended that you locate the source and eliminate its effects This is actually a valuable room diagnostic tool Press Play gt As Track 3 plays watch the RSLM carefully Watch for peak readings The peak reading may be no more than a brief flash Readjust the subwoofers gain control until the peak level observed is 048 without triggering the over range indication See Figure 7 Adjusting the subwoofer levels for a 0dB peak Tom ima Correct high level When finished press Pause II Performing Low Frequency Measurements B Read the following instructions fully before beginning tests For the following steps you will need a Measurement Template and a pencil R A B O S Measurement Template RAB OS Woturanen Tampir GT 1 PRELUDE MTS Each of the following tracks produces a low frequency test tone When finished press Skip WM to advance to the next test The range of these tests is from 100Hz down to 20Hz The Repeat the process described above for Tracks 5 through 26 frequency of each test is announced before it begins The first test 15 the highest frequency 100Hz therefore you will be When you have completed the 23 measurements you are ready to marking the template from right to left Each frequency point is analyze the data and make c
31. n on page 20 PRELUDE MTS Example 3 Peak Adjacent to a Dip Dip above or below peak AND 74 1 M UE E nt gt E ga a3 d TITIO ELA 5 ris Freguancy Response dips can occur at any frequency sometimes immediately adjacent to the peak you want to correct Two examples are shown one immediately above and one immediately below the peak Deep response dips such as these are caused by destructive wave interference Destructive interference dips occur only in one spot within the room It is not uncommon to completely eliminate the effect by moving the RSLM to a different location Note that this does not eliminate the dips We have simply moved away from them Sometimes only a few inches are required Do not attempt to correct this condition with equalization If you encounter dips like this take the following steps 1 Select a new test position Cue the test track corresponding to the center frequency of the dip In the first example in Figure 19 you would playTrack 13 56Hz Press Play gt You will see a reading very close to what you had before Now slowly move the RSLM around the area if possible remaining within about a foot of the original test point As you move the RSLM watch the bar graph You will observe large level fluctuations Find a position that restores the level to approximately that of the adjacent test
32. nment pins into cup in bottom of tower using two per tower Screw threaded ends into holes and tighten until snug DO NOT overtighten DOUBLE ENDED BANANA PLUG Full High Range Pass TOGGLE SWITCH VIEWING CUP IN BOTTOM OF SPEAKER TOWER VIEWING CUP IN BOTTOM OF SPEAKER TOWER CSre 4 Set Toggle Switch in tower cup in bottom to the Ste 6 Insert double ended Audio Banana Plug into tower Full Range position unless you are connecting your system as shown using Method 1 or Method 4 as shown on page 8 and page 10 PRELUDE MTS FRONT VIEW SPEAKER TOWER 10 32 SOCKET HEAD SCREWS t SPEAKER APP TOWER 10 32 SOCKET A HEAD SCREWS REAR SLOT OF SPEAKER pu TOWER pe w SUBWOOFER BRACKET GUIDES SCREW CAP 0 0 ALIGNMENT 0 SLOTS GUIDE HOLES FOR ALIGNMENT PINS REAR VIEW SUBWOOFER SPEAKER TOWER 10 32 SOCKET HEAD SCREWS Slowly lower the tower assembly onto the subwoofer being careful to insert the alignment pins into receptacle guide holes REAR SLOT IN BOTTOM OF SPEAKER TOWER Step 8 Fasten the four 10 32 Socket Head Screws through the tower base as shown two through the front baffle and two in the rear slot Press flush into place two screw caps to hide holes in front baffle base Make sure that the alignment slots point toward the center to assure that the surface curve matches th
33. on point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance servicing instructions in the literature accompanying the appliance 1 Read Instructions All the safety and operating instructions should be read before the product is operated 2 Retain Instructions The safety and operating instructions should be retained for future reference 3 Heed Warnings All warnings on the product and he operating instructions should be adhered to 4 Follow Instructions All operating and use instructions should be followed 5 Cleaning Unplug this product from the wall outlet before cleaning Do not use liquid cleaners or aerosol cleaners Use a damp cloth for cleaning 6 Attachments Do not use attachments not recommended by the product manufacturer as they may cause hazards 7 Water and Moisture To reduce the risk of fire or electric shock do not use this product outdoors or near water for example near a bathtub wash bowl kitchen sink or laundry tub in a wet basement near a swimming pool or the like 8 Accessories Do not place this product on an unstable cart stand tripod bracket or table The product may fall causing serious injury to a child or adult and serious damage to the product Use only with a cart stand tripod bracket or table recommended by the manufacturer or sold with the product Any mounting of the product should follow the manufactu
34. orrective adjustments The completed listed across the bottom of the Measurement Template this is Measurement template will look something like the example in called the X axis See Figure 8 on the previous page The Figure 11 vertical scale on the left side of the template indicates relative level in dBs the Y axis The template s vertical scale matches 1 that of the RSLM bar graph Completed R A B O S template Cue Track 4 and Pause ll From now on you will want to keep your CD player s remote control handy Press Play As Track 4 plays observe the level indicated on the RSLM EXAMPLE The test frequency is 100Hz and the level indicated is 2dB Find the intersection of 100Hz X axis and 2dB Y axis Place a dot at that point See Figure 9 Locating a test point ane di GI GR XA K CI CDUE DONI PAE Now connect the dots as shown in Figure 12 This will make interpretation of the data much easier 3 Test example with dots connected 7760 85 00 95 100Hz It takes few seconds for the RSLM reading to stabilize especially at very low frequencies Don t rush Give each test adequate time for the meter to stabilize At the bottom of the bar graph is a green ON LED This LED is illuminated whenever the sound level is below the measuring range of the RSLM If this occurs during a test place a d
35. ors screw the spike end into each hole instead and leave the rounded end exposed 4 Carefully flip each speaker upright to sit on its feet 5 If needed adjust the feet so each speaker is level and then tighten each nut with the enclosed wrench To protect hard surfaces e g wood floors slip a nylon dome onto each round end Note Spiked feet must be fully threaded into holes provided in base to ensure stability 1 Locking Nut 1 5 8 min lt Foot 5 8 11 max round end 1 spike end i Y f Nylon Dome included tor use Y on wood floors NM Y CARPETED HARD SURFACE FLOORS FLOORS B This cross section shows how to install the spikes onto the bottom of a Prelude MTS subwoofer or stand Installing the Tower on Top of the Subwoofer PRELUDE SUBWOOFER ster 1 Remove cap from subwoofer by gently lifting it off 4 10 32 PHILLIPS MACHINE SCREWS Y SUBWOOFER TOP FRONT VIEW Remove the four machine 10 32 Phillips flat head screws from subwoofer cup PRELUDE MTS ALIGNMENT PINS e 4 10 32 PHILLIPS MACHINE SCREWS METAL BRACKET 0 en q SUBWOOFER TOP FRONT _ VIEW 0 VIEWING CUP IN BOTTOM 0 0 OF SPEAKER TOWER Add metal bracket positioning as shown replace the four existing screws with four machine 10 32 Phillips head screws provided Screw alig
36. ot at the intersection of the test frequency and the bottom frame of the template See Figure 10 FIGURE 10 sa ne Ti BYE Indicating an under range test ware PRELUDE MTS What Does a Parametric Equalizer Do The R A B O S system uses one band of parametric equalization for response correction Parametric equalizers are the most versatile class of filters The effect an equalizer will have on the signal is dependent on three parameters Frequency The equalizer will have maximum effect at one frequency usually described as the center frequency Level This refers to the amount of cut in dBs the equalizer is set for Bandwidth Defines the range of frequencies over which the equalizer will have an effect On Prelude this adjustment is abbreviated as Width Only parametric equalizers allow independent adjustment of all three parameters These will be explained more fully in the sections that follow Completing the Measurement Template Along the bottom of the MeasurementTemplate are three fields where you will enter the equalizer settings needed to complete System optimization These instructions are based on the example in Figure 12 Use this tutorial to become familiar with the process Strategies for Several other test results will be presented later After you have completed these three entry fields you will be ready to perform the adjustments com
37. pleting R A B O S optimization Frequency The frequency of the R A B O S equalizer may be adjusted to any one of nineteen frequencies from 20Hz to 80Hz This defines where you are going to apply equalization Width The frequency range of the R A B O S equalizer may be set from 5 to 50 of an octave in 21 steps This setting defines how much of the subwoofers output will be equalized Effect of adjustable width Width is expressed as a percentage of an octave For example a width setting of 25 means the equalizer will affect a frequency band of 1 4 of an octave 1 8 of an octave above and 1 8 of an octave below the center frequency 8 The octave is a logarithmic expression From any point in the spectrum one octave above or below that point is always double or half the frequency Therefore one octave above 100Hz would be 200Hz One octave below 100Hz is 50Hz In the section that follows we will discuss the use of the Width Selector PRELUDE MTS Using the Width Selector Placement of the Bandwidth Selector Read the following instructions carefully The example presented may not look like the graph you just created Focus on the concepts and techniques presented Specific cases will be discussed later Width Selector A a el 10 d ik 7 Ki 2 j 0 s1 1 A i ki Li Fi gt XA dO 45 dA OM CIOCIED BA O amp O R
38. possible to anticipate the effect of every possible listening environment However most residential sound rooms share many characteristics and their dimensions fall into a range that make some response irregularities far more likely than others On the following pages are examples of what you may encounter Following each example a strategy for correction Compare your measurement results with the following examples Find the one that best fits your graph and follow the instructions presented for that scenario 8 Remember when looking for a match look at the descriptive characteristics not any specific frequency or level Each of these examples can occur at any frequency bandwidth and level It is unlikely that your test results will be exactly as depicted in these examples Example 1 Single Dominant Peak Single dominant peak xj an 4 DICTURUM 08 FILA ETA This 15 the most common result of speaker room interaction Apply the Width Selector as described in Figure 15 Align the center line of the Selector over the center of the peak as shown in Figure 16 Now adjust the Selector until you have achieved best fit The slider now points to the correct bandwidth setting In this example the frequency is 43Hz and the best fit width is 12 5 Fill in the Width and Frequency fields provided on the template Determine the appropriate level using the technique described
39. r If the problem appears in the opposite speaker the Cause is in another component or cable In the event that your Prelude MTS loudspeaker system ever needs service contact your local Infinity dealer or Infinity directly at 1 800 553 3332 or www infinitysystems com PRELUDE MTS Prelude MTS System Frequency Response Impedance Sensitivity 2 83v 1 meter Recommended Amplifier Power Range Subwoofer Amplifier Output In to 8Q from 20Hz 100Hz with no more than 0 1 THD 2nd and 3rd Order Harmonic Distortion 20Hz 20kHz 95dB SPL Crossover Frequencies Prelude MTS Tower Frequency Response Impedance Sensitivity 2 83v 1 meter Recommended Amplifier Power Range 2nd and 3rd Order Harmonic Distortion 20Hz 20kHz 95dB SPL Crossover Frequencies Dimensions SPECIFICATIONS 23Hz 22kHz 3dB 30Hz 20kHz 1 5dB 40 110 90dB 25 500 watts 850 watts continuous 2 600 watts peak 196 80Hz 300Hz 2kHz 24dB Octave 80Hz 22kHz 3dB 100Hz 20kHz 1 5dB 40 110 90dB 25 500 watts lt 1 80Hz 300Hz 2kHz 24dB Octave 37 x 6 1 2 x 7 1 2 940mm x 165mm x 191mm Prelude MTS Subwoofer Frequency Response Maximum Amplifier Output In to 8Q from 20Hz 100Hz with no more than 0 1 THD 2nd and 3rd Order Harmonic Distortion 20Hz 20kHz 9548 SPL Crossover Frequencies Dimensions Optional Accessories 23Hz
40. rer s instructions and should use a mounting accessory recommended by the manufacturer 9 A Product and Cart Combination Should Be Moved with Care Quick stops excessive force and uneven surfaces may cause the product and cart combination to overturn 10 Ventilation Slots and openings in the cabinet are provided for ventilation and to ensure reliable operation of the product and to protect it from overheating and these openings must not be blocked or covered The openings should never be blocked by placing the product on a bed sofa rug or other similar surface This product should not be placed in a built in installation such as a bookcase or rack unless proper ventilation is provided or the manufacturer s instructions have been adhered to 11 Power Sources This product should be operated only from the type of power source indicated on the marking label If you are not sure of the type of power supply to your home consult your product dealer or ocal power company For products intended to operate from battery power or other sources refer to the operating instructions 12 Grounding or Polarization This product may be equipped with a polarized alternating current line plug a plug having one blade wider than the other This plug will fit into the power outlet only one way This 15 a safety feature If you are unable to insert the plug fully into the outlet try reversing the plug
41. rols Simply count the number of detents necessary indicated by the results of your R A B O S Test Prelude MTS R A B O S Controls After performing these adjustments you may skip forward to the Final System Balance section It is recommended that you perform a second measurement to confirm that the settings are correct If you are going to retest the system after EQ adjustments repeat the Setting the Subwoofer Test Level section on p 13 Retesting the system will go much faster if you use Tracks 27 50 These tracks contain all the same test tones you just used However each tone plays for only a few seconds and there is no frequency announcement If you are uncomfortable operating at this pace you may of course perform measure ments with the original test tracks Your first interpretation of the data and choice of settings may not be optimum You can repeat the test adjust test cycle as often as needed to get the desired results To do this return to page 13 Setting the Subwoofer Test Level You may prefer to retest using the same template Doing so makes it easy to evaluate the improvement When you are satisfied with the results go to Final System Balance Final System Balance Cue Track 51 of the R A B O S Test CD Press Play p gt Increase the system volume until the RSLM indicates 10dB Now play Track 52 Adjust both subwoofer gain controls until 10dB is indicated on the RSLM
42. s Frequency You will use the Measurement Template just completed and the Apply pressure to the upper and lower left corners of the Width Selector to determine the correct width setting The Width Selector using the thumb and forefinger of your left hand Now Selector graphically depicts a single resonant peak The peak gently slide the tab up or down until the adjustable slice most looks similar to a slice of a pie See Figure 14 At the top of the closely fits the response data See Figure 16 Selector is a pull tab When you slide the tab up and down the width of the pie slice becomes narrower and wider respectively The pointers on the sides of the button point to the bandwidth that corresponds to the width of the slice Selector adjusted for the best fit Place the Width Selector over the Measurement Template positioning the center rivet of the Selector over the response peak as shown in Figure 15 Be sure to align the horizontal lines of the Width Selector with those of the Measurement Template BBD A ATACAR Pare PRELUDE MTS The pointer on the slider will indicate the correct width setting Enter this number the Width field of the Measurement Template In our example the width is 12 5 B Itis not realistic to expect a perfect fit Acoustic measurements encompass the behavior of not only the speakers but of the room and ts contents as well Reflected energy standing waves an
43. similar timbral signatures Qum Completing the Experience The technology and performance that make the Infinity Prelude MTS loudspeakers ideal for music listening also make them the perfect digital multichannel loudspeaker system To complete a home theater system Infinity has designed to the same precise standards as the Prelude MTS a matching 3 way center channel loudspeaker In addition the tower portions of the Prelude MTS are available separately for use as full range surround channels The towers can be either wall mounted or attached to matching Guide Pins 2 Double Ended Banana Plug 1 stands for floor placement Allen Key 1 We hope you enjoyed this brief introduction to the technology of the Prelude MTS system If you would like to further explore the technology and design of the Prelude MTS system please ask your Infinity dealer for the C M M D and R A B O S White Papers The White P downloaded from Infinity s Web 2 OA NI R A B O S Kit 1 Included with Left Subwoofer Only Unpacking the Product Finish unpacking the speakers and check the contents If you suspect damage from transit report it immediately to your dealer and or delivery service Keep the shipping carton and packing materials for future use Al 2 Included Accessories Sound Level Meter R A B O S Test CD X B PreLuDE MTS TOWER Screw Caps 2 DO Aj E de ue pec Graph Templates B
44. vertir l utilisateur de la pr sence d instructions importantes pour les op rations et l entretien service dans les manuels fournis avec l appareil ATTENTION POUR EVITER LES CHOCS ELECTRIQUES INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER JUSQUAU FOND Este destello luminoso con un s mbolo de punta de flecha dentro de un tri ngulo equil tero tiene el objectivo de alertar al usuario sobre la presencia de voltaje peligroso no aislado dentro de la caja del producto que puede ser de magnitud lo suficientemente grande para constituir un riesgo de choque el ctrico para las personas Este punto de exclamaci n dentro de un tri ngulo equil tero tiene el objectivo de alertar al usuario sobre la existencia de instrucciones operativas y de mantenimiento servicio importantes en la literatura que acoma a el aparato CUIDADO PARA REDUCIR EL RIESGO DE CHOQUE EL CTRICO NO RETIRE LA CUBIERTA 0 RESPALDO DENTRO NO HAY PEIZAS A LAS QUE EL USUARIO PUEDE DAR SERVICIO REMITA EL SERVICIO AL PERSONAL DE SERVICIO CALIFICADO IMPORTANT SAFETY PRECAUTIONS Read First RISK OF ELECTRIC SHOCK DO NOT OPEN The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the product s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons The exclamati
45. wer Lines An outside antenna system should not be located in the vicinity of overhead power lines or other electric light or power circuits or where it can fall into such power lines or circuits When installing an outside antenna system extreme care should be taken to keep from touching such power lines or circuits as contact with them might be fatal D Figure A Example of Antenna Grounding as per National Electrical Code ANSI NFPA 70 18 Overloading Do not overload wall outlets extension cords or integral convenience receptacles as this can result in a risk of fire or electric shock 19 Object and Liquid Entry Never push objects of any kind into this product through openings as they may touch dangerous voltage points or short out parts that could result in a fire or electric shock Never spill liquid of any kind on the product 20 Servicing Do not attempt to service this product yourself as opening or removing covers may expose you to dangerous voltage or other hazards Refer all servicing to qualified service personnel 21 Damage Requiring Service Unplug this product from the wall outlet and refer servicing to qualified service personnel under the following conditions a The power supply cord or the plug has been damaged or b Objects have fallen onto or liquid has been spilled into the product or c The product has been e
46. xposed to rain or water or d The product does not operate normally when following the operating instructions Adjust only those controls that are covered by the operating instructions as an improper adjustment of other controls may result in damage and will often require extensive work by a qualified technician to restore the product to its normal operation or e The product has been dropped or damaged in any way or f The product exhibits a distinct change in performance this indicates a need for service 22 Replacement Parts When replacement parts are required be sure the service technician has used replacement parts specified by the manufacturer or that have the same characteristics as the original part Unauthorized substitutions may result in fire electric shock or other hazards 23 Safety Check Upon completion of any service or repairs to this product ask the service technician to perform safety checks to determine that the product is in proper operating condition 24 Wall or Ceiling Mounting The product should be mounted to a wall or ceiling only as recommended by the manufacturer 25 Heat The product should be situated away from heat sources such as radiators heat registers stoves or other products including amplifiers that produce heat 0 Antenna Lead In Wire Ground Clamp Antenna Discharge Unit NEC Section 810 20 Grounding Conductors NEC Se
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