User manual CREST AUDIO LQ12 LOUDSPEAKER SPECIFICATIONS
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Manual abstract: user guide CREST AUDIO LQ12 LOUDSPEAKERSPECIFICATIONS
Detailed instructions for use are in the User's Guide.
[. . . ] Specifications
frequency response usable low frequency limit (-10 dB point) power handling sound pressure level
LQ 12 Loudspeaker
LQ12 Loudspeaker 76 Hz to 18 kHz ±3 dB 54 Hz Full-range 500 W continuous 1, 000 W program High freq 60 W continuous 120 W program Full range 99. 0 dB SPL, (2. 83 V input) High freq 110. 0 dB SPL, (2. 83 V input) Full range 125. 0 dB SPL continuous 134. 0 dB SPL peak High freq 127. 0 dB SPL continuous 133. 0 dB SPL peak 90o horizontal X 45o vertical Low freq 1x 12" woofer, vented High freq 0. 875 in. exit/51 mm voice coil HFTM2 compression driver on a CD horn Fbox 68 Hz Low freq High freq 1800 Hz Low freq High freq 1800 Hz at 12 dB/octave Low freq 0. 00 ms High freq 0. 00 ms horn spatially aligned Full range nominal 8. 0 minimum 5. 8 High freq nominal 8. 0 minimum 5. 4 2x 1/4" phone jacks paralleled with 2x Neutrik® NL4 Speakon® for full-range inputs. 1x Neutrik NL4S switching Speakon for bi-amp inputs. [. . . ] Utilizing Quadratic Throat Horn technology, under US Patent 6, 059, 069, the horn has lower distortion than many popular CD horn geometries. The Crest HFTM2 driver utilizes the Radialinear Planar Phase Correction System, under US Patent 6, 064, 745, which provides smoother and extended high frequency response. Input connection to the system is made via two 1/4" phone jacks, and two 4-pin Neutrik® jacks all connected in parallel are provided for signal input and daisy chaining capability, while a 4-pin Neutrik switching jack is provided for bi-amping flexibility while maintaining signal integrity. The internal passive crossover features the DPSTM Dynamic Protection System tweeter protection circuit, and an advanced topology with high performance components, to provide high power handling and reliability. The crossover provides driver roll-off and protection, as well as driver EQ for the woofer and horn. The optimal integration of the crossover with the selected drivers results in a smooth frequency response from 76 Hz to 18 kHz. An EQ contour switch is provided enabling the user to select one of two EQ settings. One setting will yield a nominally flat frequency responce, the other reduces the upper mid range frequencies which can help in keeping bright rooms from overloading, or to help achieve a mellower voicing for those applications that prefer it, such as DJ use.
enclosure materials and finish mounting provisions dimensions (H x W x D) net weight
· 12" cast frame 4" VC woofer
· Crest HFTM2 two-inch titanium compression driver
· DPSTM (Dynamic Protection System) tweeter protection
· Crossover EQ switch
· High power crossover components
· Top and bottom flying point inserts
Architects' & Engineers' Specifications: The loudspeaker system shall have an operating bandwidth of 76 Hz to 18 kHz. The nominal output level shall be 99 dB when measured at a distance of one meter with an input of one Watt. The maximum continuous power handling shall be 500 Watts, maximum program power of 1, 000 Watts and a peak power input of at least 2, 000 Watts, with a minimum amplifier headroom of 3 dB. The nominal radiation geometry shall be 90 degrees in the horizontal plane and 45 degrees in the vertical plane. The outside dimensions shall be 23. 65 inches high by 17. 75 inches wide by 14. 00 inches deep. The loudspeaker system shall be a Crest model LQ 12.
· Multiple handles and 1-3/8" stand mount
· Available in White
Crest Audio reserves the right to make improvements in manufacturing or design which may affect specifications.
8/21/01 v. 1. 5
*80304797*
Crest Audio Inc. Fair Lawn, NJ 07410 USA TEL: 201. 909. 8700 FAX: 201. 909. 8744 www. crestaudio. com
Specifications
Power Handling
There are many different approaches to power handling ratings. [. . . ] These are specifications that provide a reference to the coverage characteristics of the unit. These parameters provide insight for proper placement and installation in the chosen environment. The blending of the components of the Crest LQ 12 exhibit a desirable beamwidth and directivity (figure 3 and 4) suitable for sound reinforcement applications.
360 300 Beam w i h ( egr ) dt D ees
Beam w i h dt
180 140 100 80 60 40 30 20 H orzont i al Veri tcal 50 100 200 500 1k Fr equency ( z) H 2k 5k 10k 20k
Vertical Polars
90
o
90 60
o
o
90 60
o
o
90 60
o
o
60
o
30
o
30
o
30
o
30
o
0
o
0
o
0
o
0
o
30
o
30
o
30
o
30
o
60 90
o
o
60 90
o
o
60 90
o
o
60 90
o
o
Fi e3 gur
100
Q & D iectviy I r i t ndex
20
125 Hertz
90
o
250 Hertz
90 60
o o
500 Hertz
90 60
o o
1000 Hertz
90 60
o o
60
o
Q
10 10
30
o
30
o
30
o
30
o
Di
0
o
0
o
0
o
0
o
30
o
30
o
30
o
30
o
1 20
50
100
200
Fi e4 gur
500 1k Fr equency ( z) H
2k
5k
10k
0 20k
60 90
o
o
60 90
o
o
60 90
o
o
60 90
o
o
2000 Hertz
4000 Hertz
8000 Hertz
16000 Hertz [. . . ]
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