Meyer Sound CQ-1 User Manual

The CQ-1 wide coverage main is a self-
powered, phase-corrected reinforcement
loudspeaker offering precise, low-Q cov-
erage. The CQ-1 features a patented con-
stant-Q horn design — the result of ex-
tensive research using Meyer Sound’s cali-
brated anechoic chamber. The frequency
response of 40 Hz to 16 kHz is uniform over
the entire coverage area in both the hori-
zontal and vertical axes, with no side lobes
even when measured at a one-sixth octave
frequency resolution.
The CQ-1 loudspeaker’s unique combina-
tion of precise pattern control, compact
size, low distortion and high power make it
suitable for a wide variety of installed and
rental applications. The CQ-1 is perfect as
the main PA in small- to mid-sized audito-
riums, houses of worship, clubs and hotel
ballroom settings, and is highly effective
in delayed fill applications for arenas and
outdoor concert systems.
The CQ-1 loudspeaker’s low-frequency
section comprises a single 15-inch Meyer
Sound cone driver, and the high-frequency
section utilizes a 4-inch diaphragm com-
CQ-1 : Wide Coverage Main Loudspeaker
DATASHEET
pression driver coupled to an 80-degree by
40-degree constant-Q horn.
The sophisticated MP-2/CQ-1 power am-
plifier is integrated into an accessible,
lightweight rear module. The amplification,
processing and protection circuitry produc-
es consistent and predictable results in any
system design. The proprietary two-chan-
nel amplifier employs Meyer Sound’s prov-
en class AB/H design with complementary
MOSFET output stages, and delivers 1240
watts burst power (620 watts per channel).
Audio is processed through an electronic
crossover and correction filters for phase
and frequency response, as well as driver
protection circuitry.
Each amplifier channel has TruPower
®
lim-
iting technology which maximizes loud-
speaker reliability, minimizing power
compression and extending component
life. TruPower also affords higher continu-
ous SPL capability at all frequencies with
maximum headroom and regulates voice
coil temperature. Limiter activity is easy
to monitor with the limit LEDs on the rear
panel.
CON C ERT S ERI E S
21.00" w x 30.00" h x 22.20" d
(533 mm x 762 mm x 564 mm)
130 lbs (58.97 kg); shipping 150 lbs (68.04 kg)
All birch multi-ply
Black textured
Perforated hex metal grille frame with charcoal-grey foam
Ring and stud pan fittings, two on both top and bottom.
Working load for each fitting is 500 lbs (226.80 kg), which
is 1/5 the cabinet breaking strength (with straight tensile
pull); 3/8” or metric M10 nut plates optional
Dimensions
Weight
Enclosure
Finish
Protective Grille
Rigging
The MP-2/CQ-1 amplifier’s power supply
incorporates Meyer Sound’s Intelligent AC™
system, which performs automatic voltage
selection, EMI filtering, soft current turn-on
and surge suppression. Intelligent AC allows
fail-safe operation worldwide, with no need
to manually select the AC mains voltage.
The compact CQ-1 system is housed in an
all-birch multi-ply enclosure with a tex-
tured, hard shell black finish. It is flyable and
arrayable using standard ring and stud pan
fittings on top and bottom rated at 500 lbs
(226.80 kg) with a 5:1 safety factor. An op-
tional mounting yoke allows flexible, quick
installation and easy aiming in theatrical
and permanent applications.
Options for the CQ-1 cabinet include weath-
er protection and finishes in custom colors
for fixed installations and other situations
requiring specific cosmetics.
The CQ-1 integrates with the optional RMS™
remote monitoring system, which displays
signal and power levels, driver status, lim-
iter activity, and amplifier temperature on a
remote Windows
®
computer.
Extremely smooth horizontal pattern for
consistent sound
Ultra-low distortion yields remarkable
fidelity
Extraordinarily flat amplitude and phase
response for tonal accuracy and precise
imaging
features & benefits
Extended low-frequency response for
stand-alone applications
Constant-Q horn affords uniform
response throughout the coverage area.
Predictable performance ensures system
design flexibility
applications
Concert halls, theatres and houses of
worship
Downfill and delays in large-scale
reinforcement
Stage monitoring side fill
Paging and announcing
Cinema and 5.1 applications
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Meyer Sound CQ-1 Specifications

Acoustical Specifications

operating frequency range	35 Hz - 18 kHz
frequency response	40 Hz - 16 kHz ±4 dB
maximum peak SPL	136 dB
dynamic range	>110 dB
coverage	80° Horizontal x 40° vertical
crossover frequency	700 Hz

Transducers

low frequency driver size	15 inch
low frequency nominal impedance	8 Ω
low frequency power handling capability	600 W (AES)
high frequency driver size	4 inch diaphragm
high frequency nominal impedance	8 Ω
high frequency power handling capability	250 W (AES)

Audio Input

input type	Differential, electronically balanced
maximum common mode range	±15 V DC
input impedance	10 kΩ
nominal input sensitivity	0 dBV (1 V rms, 1.4 V pk)
input level	+20 dBV (10 V rms, 14 V pk) into 600 Ω

Amplifier

type	Two-channel complementary MOSFET output stages (class AB/H)
output power	1240 W (620 W/channel)
THD, IM, TIM	<.02%
load capacity	8 Ω each channel

AC Power

connector	250 V AC NEMA L6-20 (twistlock) inlet, IEC 309 male inlet, or VEAM
voltage selection	Automatic, two ranges, each with high-low voltage tap
safety agency rated operating range	95 V AC - 125 V AC; 208 V AC - 235 V AC; 50/60 Hz
turn-on and turn-off points	85 V AC - 134 V AC; 165 V AC - 264 V AC; 50/60 Hz
idle current	0.640 A rms (115 V AC); 0.320 A rms (230 V AC); 0.850 A rms (100 V AC)
max long-term continuous current	8 A rms (115 V AC); 4 A rms (230 V AC); 10 A rms (100 V AC)
burst current	15 A rms (115 V AC); 8 A rms (230 V AC); 18 A rms (100 V AC)
ultimate short-term peak current draw	22 A pk (115 V AC); 11 A pk (230 V AC); 25 A pk (100 V AC)
inrush current	7 A pk (115 V AC); 7 A pk (230 V AC); 10 A pk (100 V AC)

Weight and Dimensions

width	21.00 inches (533 mm)
height	30.00 inches (762 mm)
depth	22.20 inches (564 mm)
weight	130 lbs (58.97 kg)

Summary

CQ-1 Wide Coverage Main Loudspeaker Overview

CQ-1 Features and Benefits

Highlights the key advantages of the CQ-1 loudspeaker, focusing on sound quality, design, and performance.

CQ-1 Applications

Details the various environments and systems where the CQ-1 loudspeaker is optimally suited for deployment.

CQ-1 Technical Specifications

Acoustical Specifications

Details frequency response, phase response, maximum SPL, and dynamic range of the loudspeaker.

Coverage Specifications

Defines the horizontal and vertical beamwidth characteristics of the loudspeaker.

Transducer Specifications

Provides technical details for both the low-frequency cone driver and high-frequency compression driver.

Audio Input Specifications

Outlines the electrical characteristics of the audio input, including common mode range and impedance.

Amplifier and AC Power Specifications

Details the integrated amplifier's output power, distortion, and the system's AC power requirements.

RMS Network (Optional) and Notes

Explains the optional remote monitoring system and provides important usage notes and recommendations.

Architect Specifications for CQ-1

System Description and Transducer Configuration

Defines the loudspeaker as a self-powered system with specific driver and horn configuration details.

Processing, Amplifier, and Input Requirements

Specifies internal processing, amplifier class, input sensitivity, and connector types.

Powering and AC Connector Specifications

Details voltage requirements, current draw, and AC power connector types.

Enclosure, Finish, and Rigging Details

Describes the cabinet construction, finish, grille, and rigging point specifications.