ALLEN & HEATH CQ-20B User Manual

 80
User Guide V1.1.0 Issue 1
Invert Polarity – Invert the polarity of the signal. Often used where multiple
microphones are used on the same source (e.g. snare top and snare bottom)
Gain – Adjust the gain manually for the incoming signal.
Trim – Digital level adjustment, available on stereo line inputs and when an input
source is set to digital (USB/SD).
 Gain Assistant, Gain and Phantom Power are only available on Analogue Input
Sources.
Level – Displays the post-preamp (pre-processing) input level.
HPF
The High Pass Filter lets audio above a set frequency through whilst cutting out
lower frequencies. It’s commonly used wherever the low frequencies are
undesirable (e.g. microphone handling noise, traffic rumble or low background
humming) or when it is not adding anything to the mix (e.g. on predominantly mid or
high frequency sources like voice, guitar or cymbals).
Freq – Adjust the High Pass Filter frequency. When HPF is In, all frequencies above
this setting will pass whilst those below will be attenuated.
In/Out – Switch the HPF In or Out.

ALLEN & HEATH CQ-20B Specifications

General

Frequency range	20 - 20000 Hz
Channels quantity	24 channels
Supported sample rates	96 kHz
Digital sound processing	- bit
Nominal input level	17 dBu
Output impedance	75 Ω
Total Harmonic Distortion (THD)	0.002 %
Built-in display	-
Card reader integrated	Yes
Compatible memory cards	SD, SDHC
Maximum memory card size	32 GB
Bluetooth version	4.1
XLR out	8
RJ-45 ports quantity	1
USB 2.0 ports quantity	2
Number of microphone inputs	20
Rack capacity	19U
USB connector type	USB Type-A, USB Type-B
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (typical)	- W

Weight and Dimensions

Depth	154 mm
Width	372 mm
Height	134 mm
Weight	2600 g
Package type	Box
Package depth	260 mm
Package width	450 mm
Package height	250 mm
Package weight	3300 g