User manual CREST AUDIO LQ15 LOUDSPEAKER SPECIFICATIONS
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Manual abstract: user guide CREST AUDIO LQ15 LOUDSPEAKERSPECIFICATIONS
Detailed instructions for use are in the User's Guide.
[. . . ] Specifications
frequency usable low frequency limit (-10 dB point) power handling sound pressure level
LQ 15 Loudspeaker
LQ15 Loudspeaker 64 Hz to 18 kHz (±3 dB) 48 Hz Full range 500 W continuous 1, 000 W program High freq 60 W continuous 120 W program Full range 100 dB SPL, (2. 83 V input) High freq 110 dB SPL, (2. 83 V input) Full range 126 dB SPL continuous 134 dB SPL peak High freq 128 dB SPL continuous 134 dB SPL peak 90o horizontal X 45o vertical Low freq 1x 15" woofer, vented High freq 0. 875 in. exit/51 mm voice Coil HFTM2 compression driver on a CD horn Fbox 58 Hz Low freq High freq 1600 Hz Low freq High freq 1600 Hz at 12 dB/octave Low freq 0. 00 ms High freq 0. 00 ms horn spatially aligned Full range nominal 8. 0 minimum 6. 0 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. [. . . ] The Crest HF 2 driver utilizes the Radialinear Planar Phase Correction System (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. High-quality, reliable crossover components include polypropylene capacitors, and extremely high current inductors and input connectors. The optimal integration of the crossover with the selected drivers results in a smooth frequency response from 64 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 response, 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
· 15" cast frame 4" VC premium woofer
· Crest HFTM2 two-inch titanium compression driver
· DPSTM (Dynamic Protection System) tweeter protection
· Crossover EQ switch
· High power crossover components
Architects' & Engineers' Specifications: The loudspeaker system shall have an operating bandwidth of 64 Hz to 18 kHz. The nominal output level shall be 100 dB when measured at a distance of one meter with an input of one watt. The
nominal impedance shall be 8. 0 ohms. 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 28. 50 inches high by 21. 25 inches wide by 17. 25 inches deep. The loudspeaker system shall be a Crest model LQ 15.
· Top and bottom flying point inserts
· 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
*80304798*
Crest Audio Inc. [. . . ] 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 15 exhibit a desirable beamwidth and directivity (figure 3 and 4) suitable for sound reinforcement applications.
90 60
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30
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60 90
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Fi e3 gur
100
Q & D iectviy I r i t ndex
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125 Hertz
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250 Hertz
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90 60
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1000 Hertz
90 60
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Fi e4 gur
500 1k Fr equency ( z) H
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16000 Hertz [. . . ]
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