Meyer Sound CQ-2 User Manual (English)

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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 ±4 dB 40 Hz – 18 kHz

Phase Response ±90° 50 Hz – 16 kHz

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.

Meyer Sound developed the CQ Series horns in an

anechoic chamber by measuring coverage patterns

using angular and frequency resolutions of 1° and

⁄24 octave, respectively. The CQ Series horns exhibit

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.

• 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)

Features

Operating Instructions

Series

Self-Powered Loudspeaker

™

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CQ-1

Acoustical

frequency response	± 4 dB 40 Hz – 18 kHz
phase response	± 90° 50 Hz – 16 kHz
maximum peak SPL	136 dB
dynamic range	> 110 dB

Coverage

-6 dB points horizontal	80° (500 Hz – 16 kHz)
-6 dB points vertical	40° (1.5 kHz – 12 kHz)
-10 dB points horizontal	100° (500 Hz – 16 kHz)
-10 dB points vertical	50° (1.5 kHz – 12 kHz)

Transducers

low frequency transducer	15” diameter MS-15 cone
high frequency transducer	4” diaphragm MS-2001CQ horn compression driver

Acoustical Crossover Point

crossover point	700 Hz

Amplifiers

type	complementary power MOSFET output stages class AB/H
burst capability	1240 Watts (620 Watts/channel)
THD, IM, TIM	< .02 %

Audio Input

input impedance	10 kΩ electronically balanced
connector type	XLR (A-3) male and female
nominal input level	+4 dBu (1.23 Vrms)

AC Power

connector	250 V NEMA L6-20P / IEC 309 Twistlock male receptacle
voltage selection	85 – 134 V / 165 – 264 V; 50 Hz / 60 Hz
max continuous RMS current 115 V	8 A
max continuous RMS current 230 V	4 A
max burst RMS current 115 V	15 A
max burst RMS current 230 V	8 A
max peak current during burst 115 V	22 Apk
max peak current during burst 230 V	11 Apk
inrush current	< 12A @115V

Physical

dimensions	21” W x 30” H x 22 1/2” D
weight	130 lb (59 kg)
shipping weight	150 lb (68 kg)
enclosure/finish	All birch plywood/black textured
protective grill	Perforated steel grill, charcoal-grey foam
rigging fittings	Four aircraft pan fittings (two on top and bottom)
working load per fitting	500 lb

CQ-2