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LQ 10P
BIAMPED POWERED SPEAKER
User Manual
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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. Intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product. CAUTION: Risk of electrical shock — DO NOT OPEN! CAUTION: To reduce the risk of electric shock, do not remove cover. No user serviceable parts inside.
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I IM MP PO OR RT TA AN NT T S SA AF FE ET TY Y I IN NS ST TR RU UC CT TI IO ON NS S W WA AR RN NI IN NG G: : When using electrical products, basic cautions should always be followed, including the following: 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with a dry cloth. 7. Do not block any of the ventilation openings. Install in accordance with manufacturer’s instructions. 8.
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INTRODUCTION ENGLISH ™ The Crest LQ 10P features a biamped power section that provides 200 Watts peak dynamic power for the woofer and 70 Watts peak dynamic power for the compression driver tweeter, both with power amplifier compression. Offering a 10" premium long-throw woofer and the Crest ™ HF -1 compression driver, the LQ 10P provides line-level balanced inputs with volume control and loop-thru jacks. • Bi-amplified powered system with 200 Watts total power! Features • Both power amps hav
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PANEL FEATURES Rear Panel Features 2 2 1 1 3 3 ( (1 1) ) F FU US SE E The unit is AC power line fuse-protected from overloads and fault conditions with an ABC-type, fast-blow 5 Amp fuse. In the rare event of a fuse blowout, first make sure the unit is unplugged and the power switch is in the OFF position, then replace the blown fuse with a fast-blow, 5 Amp, 250 Volt AC-rated fuse ONLY. Be sure to fully seat and close the replacement fuse and fuse holder cap. Reconnect the unit to the AC power l
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PANEL FEATURES Front Panel Features 5 5 4 4 7 7 6 6 ( (4 4) ) P PO OW WE ER R L LE ED D Illuminates when the preamp electronics receive power and should illuminate when the On-Off Switch is in the ON position and the AC power cord is connected and plugged into the wall outlet. ( (5 5) ) L LI IN NE E I IN N/ /T TH HR RU U The input and output jacks are paralleled to allow the audio input signal to be daisy-chained to other devices.The “output” level is the same as the “input” level and there
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Operating Instructions C CA AU UT TI IO ON NS S The unit must be disconnected from the AC power source before any work is done on it. Refer all servicing to qualified service personnel. The heat sink on the back plate can become hot to the touch. Do not block or cover the heat sink from ventilation. DO NOT connect the inputs of the LQ10P to the output of a power amplifier; the inputs are meant to be driven from a line level strength signal. DO NOT remove the protective metal grille. DO NOT use t
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™ USE OF THE LQ 10P F FL LY YI IN NG G T TH HE E L LQ Q 1 10 0P P C Ca au ut tiio on n:: Suspending or flying the Crest LQ 10P must be done by a certified structural engineer. Important Safety Information for Mounting Crest LQ 10P speaker systems: C Ca au ut tiio on n:: Before attempting to suspend these speaker models, consult a certified structural engineer. Speakers can fall from improper suspension, resulting in serious injury and property damage. Other enclosures may not be suspended bel
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™ LQ 10P USER MANUAL S Sp pe ec ciia all n no ot te e f fo or r p pe er rm ma an ne en nt t iin ns st ta alllla at tiio on n When installing the Crest LQ 10P,AC power runs should be used and a certified electrician consulted to be sure that all AC wiring complies with local codes and regulations. Properly affix a cable clip to the cabinet to relieve strain on the IEC power cord connected to the amplifier module at (2) so the power cord cannot vibrate loose. U US SE E O OF F L LQ Q 1 10 0P
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™ LQ 10P User Manual flashing frequently, then the drive level from the mixer (or the Volume control on the LQ 10P) needs to be reduced. When first powering up the sound system, turn on all upstream electronics first, then the LQ 10P with its Volume control fully counterclockwise (all the way down). Begin checking levels with the mixer output level controls all the way down, then bring them up slowly with the LQ 10P Volume control set to the desired setting (halfway up recommended to start). U U
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TROUBLESHOOTING If there is still no output, make sure the volume control has been turned up to a reasonable level (one-third to halfway). Has the LQ 10P been in direct sunlight or excessive heat? If so, it may have triggered the thermal protection.Turn off the unit and cool as best as the situation allows. (DO NOT use liquids for this purpose!) If there is still no output, it may help to read the owner’s manual completely. H Hu um m o or r B Bu uz zz z This can be AC outlet-related.Try pluggi
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™ LQ 10P User Manual Finally, be aware that even though the LQ 10P is an extremely powerful and high output unit, it has limits and may need additional powered units or a subwoofer to provide enough sound output or coverage. In this case, try turning the mixer levels down a little to see if the sound clears up. If after checking all the things listed to check and anything else you can think of to check safely, and the system still exhibits problems, carefully note all conditions and check with y
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Care and Maintenance D DE ES SC CR RI IP PT TI IO ON N The Crest LQ10P is a powered, bi-amplified, two-way speaker system engineered to provide the highest levels of performance and capable of over 120 dB peak SPLs.The enclosure utilizes high-impact polypropylene in an injection-molded plastic trapezoidal form with a coated, perforated metal grille to offer a cosmetically elegant yet durable powered speaker system. This two-way powered system packs a 200 Watt dynamic peak power amplifier driving
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A Ar rc ch hiit te ec ct tu ur ra all & & E En ng giin ne ee er riin ng g S Sp pe ec ciif fiic ca at tiio on ns s The input signal is electronically divided into high frequencies and low frequencies by a staggered pole, third order slope line-level crossover at 2kHz.The low frequencies are processed to provide bass boost, subsonic filtering and overall response shaping, and the high frequencies are equalized for constant-directivity horn EQ and response shaping. The enclosure is constructed o
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™ SPECIFICATIONS LQ 10P E En nc cllo os su ur re e:: E En nc cllo os su ur re e m ma at te er riia alls s a an nd d f fiin niis sh h:: ™ Crest LQ 10P (domestic) Injection-molded high-impact polypropylene of a 1/4" nominal thickness with internal ribbing and bracing, textured finish, and a UL flame rating. Molded material is dark gray. F Fr re eq qu ue en nc cy y r re es sp po on ns se e:: 80 Hz to 20 kHz M Mo ou un nt tiin ng g:: ™ L Lo ow w f fr re eq qu ue en nc cy y lliim
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G Gr ra ap ph hiic cs s ™ LQ 10P Graphics Amplitude Response (1W 1m On-Axis) 110 100 90 80 70 60 20 50 100 200 500 1k 2k 5k 10k 20k Frequency (Hz) Figure 1 Beamwidth 360 300 180 140 100 80 60 40 Horizontal 30 Vertical 20 50 100 200 500 1k 2k 5k 10k 20k Frequency (Hz) Figure 2 Q & Directivity Index 20 100 Q Di 10 10 0 1 20 50 100 200 500 1k 2k 5k 10k 20k Frequency (Hz) Figure 3 16 Beamwidth (Degrees) dB SPL (re 20 Pa)
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G Gr ra ap ph hiic cs s ™ LQ 10P Graphics Harmonic Distortion : 1% Rated Power 120 110 100 90 80 70 60 50 40 20 50 100 200 500 1k 2k 5k 10k 20k Frequency (Hz) 2nd Harmonic 3rd Harmonic Harmonic Distortion : 10% Rated Power 130 120 110 100 90 80 70 60 50 20 50 100 200 500 1k 2k 5k 10k 20k Frequency (Hz) 2nd Harmonic 3rd Harmonic 17 dB SPL (re 20 Pa) dB SPL (re 20 Pa)
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P Pa at tt te er rn ns s ™ LQ 10P Horizontal Polar Patterns 6 dB per Division o o o 0 0 0 o o o o o o 30 -30 30 -30 30 -30 o o o o o o 60 -60 60 -60 60 -60 o o o o o o 90 -90 90 -90 90 -90 250 Hz 315 Hz 200 Hz o o o 0 0 0 o o o o o o 30 -30 30 -30 30 -30 o o o o o o 60 -60 60 -60 60 -60 o o o o o o 90 -90 90 -90 90 -90 500 Hz 630 Hz 400 Hz o o o 0 0 0 o o o o o o 30 -30 30 -30 30 -30 o o o o o o 60 -60 60 -60 60 -60 o o o o o o 90 -90 90 -90 90 -90 1 kHz 1.2 kHz 800 Hz 18
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P Pa at tt te er rn ns s ™ LQ 10P Horizontal Polar Patterns 6 dB per Division o o o 0 0 0 o o o o o o 30 -30 30 -30 30 -30 o o o o o o 60 -60 60 -60 60 -60 o o o o o o 90 -90 90 -90 90 -90 2 kHz 2.5 kHz 1.6 kHz o o o 0 0 0 o o o o o o 30 -30 30 -30 30 -30 o o o o o o 60 -60 60 -60 60 -60 o o o o o o 90 -90 90 -90 90 -90 4 kHz 5 kHz 3.15 kHz o o o 0 0 0 o o o o o o 30 -30 30 -30 30 -30 o o o o o o 60 -60 60 -60 60 -60 o o o o o o 90 -90 90 -90 90 -90 8 kHz 10 kHz 6.3 kHz 19
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P Pa at tt te er rn ns s ™ LQ 10P Horizontal Polar Patterns 6 dB per Division o o 0 0 o o o o 30 -30 30 -30 o o o o 60 -60 60 -60 o o o o 90 -90 90 -90 16 kHz 12.5 kHz 20
