DCS SC-424, SC-424-8, SC-444 Loudspeaker User Manual
Contents
1. 20 50 100 200 500 1K 2K 5K 10K 20K Frequency Hz MHV 1090 SPL vs Frequency Quad amp No Screen 20 50 100 200 500 1K 2K 5K 10K 20K Frequency Hz SPL dB normalized SPL dB normalized MHV 1090 SPL vs Frequency X curve Tri amp With and Without Screen 5 without screen X curve 3 dB X curve 3 dB with screen 5 20 50 100 200 500 1K 2K 5K 10K 20K Frequency Hz MHV 1090 SPL vs Frequency X curve Quad amp With and Without Screen 10 X curve 3 dB without screen X curve 3 dB with screen 20 50 100 200 500 1K 2K 5K 10K 20K Frequency Hz Warranty USA only other countries see your dealer or distributor Disclaimer OSC Audio Products Inc is not liable for any damage to amplifiers or any other equipment that is caused by negligence or improper installation and or use of this loudspeaker product QSC Audio Products 3 Year Limited Warranty OSC Audio Products Inc QSC guarantees its products to be free from defective material and or workmanship for a period of three 3 years from date of sale and will replace defect2. g 102mm z lt 20 gt 508mm Copyright 2003 2004 2007 QSC Audio Products Inc QSC is a registered trademark of OSC Audio Products Inc QSC and the QSC logo are registered with the U S Patent and Trademark Office TD 000141 00 rev E joe TTT sg MADAUADAVA DAVAU TO UTOTT Normal Connection Example Connections Normal Connection The LF 4215 has barrier strip screw termi nals for connection The terminals accept up to 10 AWG stranded loudspeaker wir ing Use the largest wire size and shortest wire length possible for a given installa tion Observe the polarity markings and keep polarity consistent throughout the system for best performance INPUT SPKI SPEAKERS INTERNALLY CONNECTED IN PARALLEL FOR INDIVIDUAL CONNECTION REMOVE PANEL CUT YELLOW AND BLUE JUMPER WIRES For instructions see User Manual Parallel Connection of Second LF 4215 Parallel Connection Example The terminals marker SPK2 may be used to connect another LF 4215 in parallel Con nect the wires as shown in the illustration at right Note If the LF 4215 s internal wir ing has been modified in any way this may not function If this is the case remove the terminal cup and verify the presence
3. 1675 MacArthur Blvd Costa Mesa CA 92626 USA Main Number 714 754 6175 Sales amp Marketing 714 957 7100 or toll free USA only 800 854 4079 Customer Service 714 957 7150 or toll free USA only 800 772 2834 Cinema Mid High Very High Loudspeaker System User Manual R M H V 1 090 10 254mm mid coax high very high compression driver Introduction The MHV 1090 system provides the mid high and very high frequency components of four way screen channel loudspeaker system for high performance cinema applica tions It was designed to operate with and be directly mounted on QSC s cinema low frequency enclosures The high frequency horn is a low distortion waveguide providing highly articulate dia logue without the coloration associated with conventional horn loudspeakers Both horns feature broad horizontal and vertical coverage to ensure audio integrity is deliv 30 ered to every seat in the auditorium The driver assemblies are mounted on an adjust lt 762mm able pan and tilt bracket that has an integral aiming sight simplifying installation The MHV 1090 includes a driver protection and high very high frequency crossover network to assure reliable operation DC blocking capacitors protect against DC or N low frequency signals that could damage an unprotected driver A 12 dB per octave oe crossover seamlessly blends the high and very high frequency elements when oper ated in tri amp mode Outboard processing
4. The LF 4215 8 is an 8 ohm version of the standard 4 ohm LF 4215 The two custom 400 watt 15 transducers were developed especially for cinema use They fea ture extremely large 4 100mm voice coils and a multi vented pole piece to ensure cool opera tion even at high power levels Cooler temperatures increase transducer lifespan and decrease the problem of power compression at high power An undercut pole piece ensures the voice coil operates in a Symmetrical Magnetic Gap SMG reducing second harmonic distortion The enclosure is constructed of high quality MDF panels and features Single Woofer Chambers SWC separate chambers for each transducer In the rare event of a transducer failure this prevents over excursion of the remaining transducer caused by improper box loading Large Fully Radiused Ports FRP ensure smooth air flow through the ports especially at higher power This prevents potentially audible port turbulence noise Both internal and external port openings are fully radiused With Symmetrical Port Loading SPL bass ports are evenly spaced on each side of the trans ducers making internal pressure more uniform across the back surface of the transducer This prevents the cone from being displaced to one side or another by unbalanced forces reducing the chance of driving the voice coil out of the center of the gap at high power Three T nuts in the top of the enclosure provide easy mounting of OSC s HF 75 high fr
5. ranty statement please visit www qscaudio com Contact us at 800 854 4079 or visit our website at www qscaudio com Contacting QSC Audio Products Mailing address OSC Audio Products Inc 1675 MacArthur Boulevard Costa Mesa CA 92626 1468 USA Telephone Numbers Main Number 714 754 6175 Sales amp Marketing 714 957 7100 or toll free USA only 800 854 4079 Customer Service 714 957 7150 or toll free USA only 800 772 2834 Facsimile Numbers Sales amp Marketing Fax 714 754 6174 Customer Service Fax 714 754 6173 World Wide Web www gscaudio com E mail info qscaudio com service qscaudio com QSC QSC Audio Products Inc 1675 MacArthur Boulevard Costa Mesa California 92626 USA 2003 2004 2007 OSC and the QSC logo are registered with the U S Patent and Trademark Office Kapton is a registered trademark of E l du Pont de Nemours and Company
6. 4215 Specifications subject to change without notice Frequency Range 38 1300 Hertz 3 dB 30 1400 Hertz useable range 10 dB Nominal Coverage 100 horizontal X 55 vertical at 600 Hertz Maximum Output 134 5 dB SPL calculated peak 1 meter half space at rated rms power with 6 dB crest factor pink noise input 25 250 Hertz 128 5 dBA SPL calculated maximum continuous 1 meter The dBA scale is typically used to identify sound sources which can cause permanent hearing loss Impedance 4 ohms nominal 8 ohms nominal LF 4215 8 Maximum Input Power 800 watts rms 100 hours of 6 dB crest factor pink noise 30 500 Hertz 1000 watts rms 2 hours of 6 dB crest factor pink noise 30 500 Hertz AES method recommended amplifier power capability 1600 watts rms maximum into 4 ohms LF 4215 or 8 ohms LF 4215 8 Sensitivity 99 5 dB half space 93 5 dB full space 35 1000 Hertz 1 watt 1 meter Recommended Processing Subsonic filter below 30 Hertz gt 18 dB per octave maximum recommended crossover frequency is 1000 Hertz OSC DSP configurations are available at www qscaudio com Parameters for alternative processing hardware are available upon request Connectors Barrier strip screw terminals accept up to 10 AWG stranded wire Four terminals two INPUT and two PARALLEL OUT Drivers are internally wired in parallel For independent transducer connection remove blue jumper wire and yel low jumper wire on internal side of
7. crossover for tri amp mode only There is no crossover connected when operating in quad amp mode All required signal processing must be done before the signal is applied to the loudspeaker Do not connect any signal to the upper sets of OUTPUT terminals NOTE Maintain proper loudspeaker connection polarity throughout the entire system for maximum performance Do not apply TRI AMP mode connections Ensure the mode selector switch is set to TRI AMP connect the low frequency signal to the low frequency enclosure connect the mid frequency signal to the mid frequency driver connect the high very high frequency signal to the VHF HF terminals on the INPUTS ter minal strip Signal Processing MHV 1090 Amplification Low Frequency Enclosure QUAD AMP mode connections Ensure the mode selector switch is set to QUAD AMP connect the low frequency signal to the low frequency enclosure connect the mid frequency signal to the mid frequency driver connect the high frequency signal to the HF termi nals on the INPUTS terminal strip connect the very high frequency signal to the VHF terminals on the INPUTS terminal strip MHV 1090 Signal Processing ca EEM HMM Oooo Amplification OIOI Low Frequency Enclos
8. is required to form the crossover between the low mid and high very high frequency drivers oN DA Tri amp or quad amp operation is possible using a selector switch mounted on the ES SO INPUTS connection panel The tri amp setting provides a built in passive crossover g rere eek 2 network between high and very high frequency drivers Separate amplifiers and active J eae ot hy crossovers are required for the low mid high very high frequency channels Quad Fa he Yo amp setting disables the internal high very high frequency crossover and each driver is driven independently by its own amplifier and active crossover one each required for the low mid high and very high frequency drivers The MHV 1090 components come pre assembled to reduce field assembly time Three J bolts are all that are required to secure the assembly to the top of a QSC low fre N S quency enclosure am Install in accordance with OSC Audio Product s instructions and a A licensed professional engineer Only use attachments mounts accessories or brackets specified by QSC Audio Products Inc Refer all servicing to qualified personnel Servicing is required when the apparatus has been damaged in any way speaker product inspect all hardware suspension enclosures transducers brackets and associated equipment for damage Any 39 missing corroded deformed or non load rated component could sig 991mm nificantly reduce the strength of the ins
9. of the factory yellow jumper and blue jumper wires remedy as required or have the loudspeaker serviced INPUT SPK1 SPK2 SPEAKERS INTERNALLY CONNECTED IN PARALLEL FOR SPEAKERS INTERNALLY CONNECTED IN PARALLEL FOR INDIVIDUAL CONNECTION REMOVE PANEL CUT YELLOW INDIVIDUAL CONNECTION REMOVE PANEL CUT YELLOW AND BLUE JUMPER WIRES AND BLUE JUMPER WIRES For ins User Manual Individual Transducer Connection requires modification AUTION Requi lof T i pe ind ois eI 2 terminal cup and cutting of Individual Transducer both the yellow and the blue Connection Example jumper wires that connect the SPK1 and SPK2 terminals The transducers are wired in parallel inside the enclosure If individual trans ducer connection is required remove the terminal cup and remove the yellow and the blue jumper wires that are connected between the SPK1 and SPK2 terminals Replace the terminal cup and mark the enclosure with a note of the modification o INPUT SPKI SPK2 SPEAKERS INTERNALLY CONNECTED IN PARALLEL FOR INDIVIDUAL CONNECTION REMOVE PANEL CUT YELLOW AND BLUE JUMPER WIRES For instructions see User Manual LF
10. terminal cup and mark enclosure accordingly Transducers Two 15 381mm high efficiency low frequency transducers featuring vented 4 100mm copper voice coils on Kap ton formers High excursion low distortion design with extremely high power handling and low thermal and port compression Enclosure Quasi B4 alignment ported enclosure with fully flared ports low turbulence symmetrical port design tuned to 36 Hertz constructed of medium density fibreboard and heavily braced Features vandal resistant woofer mounting bolts Size 30 wide X 35 high X 20 deep 762 mm X 889 mm X 508 mm Weight 195 Ibs shipping 172 Ibs net 88 78 kg SPL and Impedance vs Frequency 120 60 115 55 110 50 105 l 45 SPL 2pi TIAL 100 40 a 1 m s AINT 3 5 z J7 T SPL Api 90 i 30 8 3 ss j sg 1 2 80 A 20 d i i LF 4215 8 Impedance rea tg J Fall wth 10 i t M TTT Gan 65 e satt MEEK UN OSA GOTT ATTN 11 S n a BRE TIE PTC mal 5 T S peeti F 4215 Impedance 1 60 0 10 20 50 100 200 500 1K 2K 5K 10K Frequency Hertz Warranty USA only other countries see your dealer or distributor Disclaimer OSC Audio Products Inc is not liable for any damage to amplifiers or any other equipment that is caused by negligence or improper installation and or use of this loudspeaker product Q
11. A 92626 1468 USA Telephone Numbers Main Number 714 754 6175 Sales amp Marketing 714 957 7100 or toll free USA only 800 854 4079 Customer Service 714 957 7150 or toll free USA only 800 772 2834 Facsimile Numbers Sales amp Marketing Fax 714 754 6174 Customer Service Fax 714 754 6173 World Wide Web www gscaudio com E mail info qscaudio com service qscaudio com aoc OSC Audio Products Inc 1675 MacArthur Boulevard Costa Mesa California 92626 USA 2007 QSC and the QSC logo are registered with the U S Patent and Trademark Office 1675 MacArthur Blvd Costa Mesa CA 92626 USA Main Number 714 754 6175 Sales amp Marketing 714 957 7100 or toll free USA only 800 854 4079 Customer Service 714 957 7150 or toll free USA only 800 772 2834 Cinema Loudspeaker Systems User Manual LF 421 5 and LF 421 5 8 Low Frequency Loudspeakers Introduction The LF 4215 dual 15 381mm low frequency enclosure is designed specifically for cinema applications Meeting cinema requirements for extended low frequency response differentiates the LF 4215 from more conventional rock and roll woofer systems The LF 4215 covers the frequency range from 35 Hertz to 1000 Hertz depending upon the high frequency system requirements Close Coupled Woofers CCW with its tight spacing between woofers improves coupling and keeps coverage angles wide over a greater frequency range than more widely spaced designs
12. SC Audio Products 3 Year Limited Warranty OSC Audio Products Inc QSC guarantees its products to be free from defective material and or workmanship for a period of three 3 years from date of sale and will replace defective parts and repair malfunctioning products under this warranty when the defect occurs under normal installation and use provided the unit is returned to our factory or one of our authorized service stations via pre paid transportation with a copy of proof of purchase i e sales receipt This warranty provides that the examination of the return product must indicate in our judgment a manufacturing defect This warranty does not extend to any product which has been subjected to misuse neglect accident improper installation or where the date code has been removed or defaced OSC shall not be liable for incidental and or consequential damages This warranty gives you specific legal rights This limited warranty is freely transferable during the term of the warranty period Customer may have additional rights which vary from state to state In the event that this product was manufactured for export and sale outside of the United States or its territories then this lim ited warranty shall not apply Removal of the serial number on this product or purchase of this product from an unauthorized dealer will void this limited warranty Periodically this warranty is updated To obtain the most recent version of OSC s war
13. equency system or MH 1075 mid high system Enclosure is not designed to be suspended flown or rigged Do not suspend A fly or rig this enclosure This product is capable of producing sound pressure levels that can perma nently damage human hearing Always keep sound pressure levels in the lis tening area below levels that can damage human hearing Install in accordance with OSC Audio Product s instructions and a licensed professional engineer Only use attachments mounts accessories or brack ets specified by QSC Audio Products Inc Refer all servicing to qualified per sonnel Servicing is required when the apparatus has been damaged in any way product inspect all hardware suspension cabinets transducers brackets and associated equipment for damage Any missing corroded deformed or non load rated component could significantly reduce the strength of the installation placement or array Any such condition severely reduces the safety of the installation and should be immediately corrected Use only hard ware which is rated for the loading conditions of the installation and any pos sible short term unexpected overloading Never exceed the rating of the hardware or equipment Consult a licensed professional engineer when any doubt or questions arise regarding a physical equipment installation WARNING Before placing installing rigging or suspending any speaker Mounting points for high or mid high system
14. ive parts and repair malfunctioning products under this warranty when the defect occurs under normal installation and use provided the unit is returned to our factory or one of our authorized service stations via pre paid transportation with a copy of proof of purchase i e sales receipt This warranty provides that the examination of the return product must indicate in our judgment a manufacturing defect This warranty does not extend to any product which has been subjected to misuse neglect accident improper installation or where the date code has been removed or defaced OSC shall not be liable for incidental and or consequential damages This warranty gives you specific legal rights This limited warranty is freely transferable during the term of the warranty period Customer may have additional rights which vary from state to state In the event that this product was manufactured for export and sale outside of the United States or its territories then this lim ited warranty shall not apply Removal of the serial number on this product or purchase of this product from an unauthorized dealer will void this limited warranty Periodically this warranty is updated To obtain the most recent version of OSC s war ranty statement please visit www qscaudio com Contact us at 800 854 4079 or visit our website at www qscaudio com Contacting QSC Audio Products Mailing address OSC Audio Products Inc 1675 MacArthur Boulevard Costa Mesa C
15. sembly is equipped with an aiming sight to assist in achieving desired coverage quickly and easily For typical applications the aim point should be the center seat in the back row of the auditorium If the cinema screen has already been installed a flash light placed at the desired aiming point can be seen through the screen perforations in a darkened auditorium Where the sight holes are located How to use the sights Aim point Settings and Connections TRI AMP QUAD AMP Operating Mode Selection Mode selector switch set to Set the operating mode selector switch to TRI AMP or QUAD AMP depending on your screen chan TRI AMP and the required nel signal processing and amplification set up The mid frequency driver will require connection to its HF VHF connection rear cover terminals regardless of mode selection The low frequency driver will also require its own separate connections The only connection difference between tri amp and quad amp modes is in quad amp mode the very high frequency signal will require connection to the terminals labeled VHF TRI AMP When set to TRI AMP the MHV 1090 input panel connections accept high frequency very high frequency signals on one set of inputs and uses an internal crossover network between the high and very high frequency drivers HF VHF 2 0 QUAD AMP QUAD AMP When set to QUAD AMP the MHV 1090 input panel accepts
16. separate high and very high frequency signals on two separate sets of inputs The internal crossover network is bypassed and only the protective circuitry for the high frequency and very high frequency driver remains Each of the driver s signals must have the appropriate upstream signal processing Mode selector switch set to QUAD AMP and the required sep Do not connect amplifiers directly to the high very high frequency coaxial driver arate HF and VHF connections N inputs e Always use the crossover INPUTS terminal strip for high and very high frequency input s 3 eThe mid frequency driver and the low frequency enclosure are connected directly VHF to their own separate amplifiers regardless of mode selector switch setting lt HF lt ie INPUTS Terminals The MHV 1090 has barrier strip screw terminals that accept up to 10 AWG 5 3mm stranded loudspeaker wire Observe proper polarity Use the largest wire size and shortest wire length for the application OUTPUTS Terminals The OUTPUT terminals are factory connected to the high and very high frequency drivers These terminals should ONLY be connected to their respec tive driver Do not connect signals to these terminals as all protection and equalization circuitry will be bypassed They are not for daisy chaining the signals to other drivers full range signal to the MHV 1090 There is a high very high frequency passive
17. tallation placement or array Any such condition severely reduces the safety of the installation and should be immediately corrected Use only hardware which is rated for the loading conditions of the installation and any possible short term unexpected overloading Never exceed the rating of the hard ware or equipment Consult a licensed professional engineer when any doubt or questions arise regarding a physical equipment installa tion WARNING Before placing installing rigging or suspending any HEL 20 508mm TD 000246 00 A Copyright 2007 QSC Audio Products Inc QSC is a registered trademark of QSC Audio Products Inc QSC and the QSC logo are registered with the U S Patent and Trademark Office Mounting Attaching to Low Frequency Enclosure The MHV 1090 attaches to the top of QSC low frequency enclosures with three 0 75 long 5 16 18 TPI bolts ensure the use of lock washers on all bolts The bolts and washers ship installed on the low frequency enclosure We recommend the use of serviceable thread locking compound when installing the bolts to prevent loosening due to vibration Do not fully tighten the mounting hardware before aiming in the horizontal plane see below Aiming Aim the horn in the horizontal plane pan before tightening the three bolts securing the MHV 1090 to the low frequency enclosure Adjust the vertical tilt with the vertical adjustment bracket The mid high as
18. ure Amplification MHV 1090 Specifications subject to change without notice Freq Range Nominal Coverage DI Q Max Output calculated 1 meter full space Impedance Maximum Input Power AES method 2 hours Sensitivity 1 Watt 1 meter Crossover Frequencies Crossover Network Connectors Transducers Mounting Hardware Size Weight 180 20k Hz 6dB full space 90 horizontal X 20 to 30 vertical 50 total adjustable mount provides for vertical plane adjustments The horizontal plane can be adjusted by altering mounting position on the low frequency enclosure before tightening bolts 9 dB 400 to 16k Hz average 8 400 to 16k Hz average Mid frequency 135 5 dB SPL Tri amp mode high frequency very high frequency 138 dB SPL Quad amp mode high frequency 138 dB SPL very high frequency 135 dB SPL Tri amp mode 8 ohms nominal mid frequency and high very high frequency Quad amp mode 8 ohms nominal mid high and very high frequency Mid frequency 275 W Tri amp mode high very high frequency 155 W calculated sum of high and very high frequency individual ratings Quad amp mode high frequency 85 W very high frequency 70 W Mid frequency 105 dB SPL Tri amp mode high very high frequency 110 dB SPL Quad amp mode high frequency 110 dB SPL very high frequency 110 dB SPL Tri amp mode mid frequency 250 Hz or higher high very frequenc
19. y 1 7 kHz both 24 dB octave Quad amp mode mid frequency 250 Hz or higher high frequency 1 7 kHz very high frequency 6 0 kHz all 24 dB octave High frequency to very high frequency crossover at 7 kHz 12 dB per octave only in tri amp mode Quad amp mode switch setting removes crossover circuit from signal path but leaves DC blocking capacitors in circuit Mid frequency driver barrier strip screw terminals on mid frequency driver accept up to 10 AWG stranded wire High frequency very high frequency drivers barrier strip screw terminals accept up to 10 AWG stranded wire Tri amp mode connect high frequency very high frequency program only to VHF HF INPUTS terminals Quad amp mode connect high frequency program to HF INPUTS terminals and connect very high frequency program to VHF INPUTS terminals Mid frequency 10 high efficiency mid range phase ring loaded High frequency 1 5 exit 3 5 voice coil polyester diaphragm coaxial compression driver Very High frequency 1 5 exit 1 75 voice coil polyester diaphragm coaxial compression driver Attaches to top of QSC s low frequency cinema enclosures using three 5 16 18 x 3 4 long bolts supplied on low fre quency enclosure 39 high x 30 wide x 20 deep 991 x 762 x 508mm 73 5 Ib 33 kg net SPL dB normalized SPL dB normalized MHV 1090 SPL vs Frequency Tri amp No Screen 10
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