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Operating Instructions
The CQ™ Series self-powered loudspeakers contain
independent amplifier and control electronics for one
15" bass-reflex cone driver and one 4" diaphragm horn
driver in a compact enclosure. This integrated design
eliminates amplifier racks, simplifies setup and
installation, and improves durability and reliability.
The CQ Series, consisting of the CQ-1 (low Q) and
CQ-2 (high Q), are efficient full-range speakers and
ideal companions for the PSW-2, PSW-4, and 650-P
self-powered subwoofers. The CQ Series have the
following acoustical specifications:
Frequency Response
Phase Response
Max Peak SPL at 1 m
CQ-1: 136 dB; CQ-2: 139 dB
Dynamic Range
> 110 dB
The CQ is phase-corrected through the crossover, which
yields exceptional system impulse response and
accurate signal reproduction.
The beam width of a horn is the angle at which the
sound pressure at a given frequency decreases to half
(–6 dB) its on-axis value. Most horns have a beam width
that varies with respect to frequency, nonuniform
frequency response within their coverage area, and
significant side lobes outside their beam width. These
undesirable characteristics are easily identified by
viewing polar patterns plotted at various frequencies.
4 dB 40 Hz – 18 kHz
90 50 Hz – 16 kHz
CQ Series
™
Self-Powered Loudspeaker
Patents Pending
Features
• Wide and narrow overage patterns
for CQ-1 (low Q) and CQ-2 (high Q)
• Self-contained control electronics,
amplifiers, and drivers
• Dual-channel 1240 Watt amplifier
(620 Watts per channel)
• Active balanced input circuit
• Active crossover with optimized
pole-zero filter combinations
• Intelligent AC™ System
• TruPower™ Limiting (TPL)
• Compatible with the Remote
Monitoring System™ (RMS)
Meyer Sound developed the CQ Series horns in an
anechoic chamber by measuring coverage patterns
using angular and frequency resolutions of 1 and
1
⁄
octave, respectively. The CQ Series horns exhibit
24
Constant Q: the beam width remains consistent across
the horn's operating frequency range in both the vertical
and horizontal planes. The CQ-1 has a wider horizontal
beam width than the CQ-2. The CQ Series have the
same vertical beam width and share the following
remarkable attributes:
• uniform frequency response within the beam width
• rapid and uniform amplitude attenuation for all
frequencies outside the beam width
• minimal side lobes
The CQ horns are an unprecedented development in
acoustical measurement, design, and manufacturing.
The CQ Series loudspeakers are ideally suited for venues
requiring precise coverage with minimal interaction
between subsystems but are appropriate for any
acoustical environment.
The CQ can be equipped to operate with the Remote
Monitoring System™ (RMS) interface network and
software application. RMS displays signal and power
levels, driver and cooling fan status, limiter activity, and
amplifier temperature for all speakers in the network on
a Windows-based PC.
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Table of Contents
Related Manuals for Meyer Sound CQTM Series
Summary of Contents for Meyer Sound CQTM Series
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Page 1: Operating Instructions
• Intelligent AC™ System • TruPower™ Limiting (TPL) • Compatible with the Remote Monitoring System™ (RMS) Meyer Sound developed the CQ Series horns in an anechoic chamber by measuring coverage patterns using angular and frequency resolutions of 1 and ⁄... -
Page 2: Declaration Of Conformity
Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC. Office of Quality Manager Berkeley, California USA October 1, 1996 Made by Meyer Sound, Berkeley, CA, USA European Office: Meyer Sound Germany GmbH Carl Zeiss Strasse 13 56751 Polch, Germany Meyer Sound Laboratories, Inc. -
Page 3: Table Of Contents
50-60Hz 1400W RMS MAX 1400W RMS MAX Network Loop Meyer Sound, Berkeley, CA. USA R e m o t e M o n i t o r i n g S y s t e m Dimensions All units in inches Side 2.0"... -
Page 4: Ac Power
The minimum electrical service amperage required by a system of CQs is the sum of the maximum continuous RMS current for each speaker. We recommend allowing an additional 30% above the minimum amperage to prevent peak voltage drops at the service entry. -
Page 5: Audio Input
In the unlikely case that the circuit breakers trip (the white center buttons pop out), the amplifier or power supply may be malfunctioning. Do not reset the breakers! Contact Meyer Sound for repair information. If abnormal noise (hum, hiss, popping) is produced from the loudspeaker, disconnect the audio source from the speaker. -
Page 6: Limiting And Protection Circuitry
TPL activity except one, then that unit may have an open voice coil; disconnect it and contact Meyer Sound for repair information. TPL can indicate an imbalance in a configuration of speakers by functioning like a spectrum analyzer. If the... -
Page 7: Rigging
Contact Meyer Sound for information about weather-protected units. NOTE: All Meyer Sound products must be used in accordance with local, state, federal, and industry regulations. It is the owner’s and/or user’s responsibility to evaluate the reliability of any rigging method for their application. -
Page 8: Complete Systems
• measure and equalize variations in frequency response caused by the acoustical environment and the placement and interaction of speakers. Contact Meyer Sound for assistance with your application. The LD-1A Line Driver We recommend using the Meyer LD-1A Line Driver to integrate different types of Meyer self-powered speakers into a full-range system. - Page 9 LD-1A with CQ and 650-P Activating the Lo Cut filter on the LD-1A for the Mid-Hi output also eliminates the low frequency rise caused by the overlap between the CQ and 650-P. Although a typical CQ : 650-P ratio is 2:1, separate Sub and Mid-Hi level controls on the LD-1A allow the ratio to vary while maintaining control of the spectral balance of the system.
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Page 10: Verifying Polarity
Verifying Polarity Incorrect driver polarity impairs system performance and may damage the drivers. All Meyer Sound loudspeakers are shipped with the drivers in correct alignment. However, if the driver or circuit wiring has been removed or disassembled in any loudspeaker in... -
Page 11: Coverage Angles And Polar Plots
Polar Plots The data for the CQ Series polar patterns was measured in Meyer Sound’s anechoic chamber (photo at right) with the SIM System II Sound Analyzer in dB SPL at a distance of 14 ft, using angular and frequency resolutions of 1 and ⁄... - Page 12 CQ-1: 125 Hz CQ-1: 500 Hz CQ-1: 2 kHz CQ-1: 8 kHz CQ-1 Polar Plots Inner plot is vertical unless otherwise indicated. vertical vertical CQ-1: 250 Hz vertical CQ-1: 1 kHz CQ-1: 4 kHz CQ-1: 16 kHz...
- Page 13 CQ-2 Polar Plots vertical Inner plot is vertical unless CQ-2: 125 Hz CQ-2: 250 Hz otherwise indicated. vertical vertical CQ-2: 500 Hz CQ-2: 1 kHz CQ-2: 2 kHz CQ-2: 4 kHz CQ-2: 8 kHz CQ-2: 16 kHz...
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Page 14: Array Design
50 60 2 @ 40 50 80 A series of outdoor tests was conducted at Meyer Sound to determine the coverage angle and on-axis SPL for arrays with one and two horizontal rows of up to four elements each, at numerous splay angles. The measurements were conducted at a distance of 8 m with half-space loading;... -
Page 15: Safety Summary
English • To reduce the risk of electric shock, disconnect the loud- speaker from the AC mains before installing audio cable. Reconnect the power cord only after making all signal connections. • Connect the loudspeaker to a two-pole, three wire ground- ing mains receptacle. -
Page 16: Specifications
4. The unit is rated at 88 – 125 VAC and 182 – 235 VAC, 50/60 Hz, to satisfy EC standards for –10% to 6% AC line voltage. Copyright © 1997 Meyer Sound Laboratories, Inc. All rights reserved Part # 05.041.010.01 Rev A...