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CM Series
CM Series Getting Started
Rack Mounting
The CM series amplifi ers come with rubber feet that
enable the amps to be placed on a clear surface
without an additional installation. However, optional
rack mounting hardware is also supplied, allowing
several models to be housed and protected inside a
19" rack enclosure. Follow these steps to attach the
mounting hardware.
A pair of CM41 units can be mounted side-by-side to
occupy a single rack space. Attach the coupling plate
to the underside of 2 CMA1201 units using the
included screws. Alternatively, a single CMA1201 unit
Mount the CM unit(s) into the rack by attaching
can be installed in the rack using the long
4 rack screws through the front angle brackets and
angle bracket..
rack rails.
Hold one of the rear angle brackets up to the rear
rack rails so that it lines up next to the rear fl at
bracket. Do not attach it to the rear rails yet.
Insert the included shoulder screw through the slot
in the rear fl at bracket and into one of the threaded
holes in the rear angle bracket. The screw should
allow the rear angle bracket to slide forward and
back within the fl at bracket's slot.
Attach the front angle brackets to either side of a
CM82 unit, or a pair of CM41 units that have
been coupled..
Repeat the process for the other rear angle bracket.
Mount the rear angle brackets to the rear rack rails
using 4 standard rack screws.
Tighten the shoulder screw if necessary.
Standard rack screw: M4 x 8 mm.
If your rack has rear rails, attach the rear fl at brackets
with the included screws.
Connections
For balanced or microphone input connections,
use a 3-pole cable (hot, cold, ground) wired to a
Euroblock connector. Alternatively, RCA cables can
be connected for unbalanced stereo sources, but
the RCA and Euroblock inputs should not be used
together on the same input. Note that stereo signals
will be summed to mono.
Output signals use the same Euroblock connector as
the inputs.
3-Pin Euroblock Connector - Input / Output
1
1. hot (+)
2
2. cold (-)
3
3. ground/shield
Input Routing
For CM82 units, the routing of inputs to outputs can
be controlled with the input routing dipswitches.
By default (switches down), Inputs A-D are routed
to Output A and Inputs E-H are routed to Output B.
However, for sources that should be sent to both
outputs, the corresponding dipswitch can be
engaged to route an input to the other output
channel as well. This is useful, for example, to send
background music or paging messages to both
zones/sections of a building but maintain other
sources local to each zone.
Phantom power (48 V) can also be supplied to
channels A-D and E-H independently by engaging
the corresponding dipswitch.
Signal Wake-up
Remote
If the amps are powered on, but do not receive
RJ-45
any input signal (below signal present level) for
Pin
20 minutes, the system will enter standby mode
to save power consumption. As soon as a signal is
1
detected at any input, the unit will exit standby
mode and resume normal function. The system can
also be waken up by shorting the priority pins.
2
Priority and Vox
3
8
RJ45 receptacle to connect an optional remote
volume control per channel. Use a standard cable to
5-Pin Euroblock Connector - Remote
connect the CRC-V accessory, or connect a custom
potentiometer with the pinout information.
Cable length above 305 m (1000 ft) is not
recommended.
1
2
1. priority 1
3
2. priority 2
4
3. ground/shield
5
4. cold (-)
5. hot (+)
Inputs A and B (Input A only on CM41) have the
ability to mute all other channels when the Priority
function is activated. Activation is achieved by
shorting the 2 Priority pins with a closure switch,
often found on paging mics. Alternatively, the
activation can also be done by the signal on the
prioritized input exceeding a set level(threshold).
Turning the VOX knob counterclockwise sets the
input level required to engage ducking. Set it so that
speaking clearly into the mic exceeds this threshold,
but ambient noise is ignored. Turning the VOX knob
fully clockwise (OFF) disables this feature. For CM82,
the ducking aff ects all other sources that are
routed to the same output as the prioritized input.
For example, if Input A is routed also to Output B,
Input A will have priority over all other inputs.
Input E, however, cannot have priority over the
Output A inputs.
Quick Start Guide
Remote
Color
Remote
Remote B
(1 channel
(T568B)
A+B
products )
VCC
VCC
VCC
White/
10 V
10 V
10 V
Orange
Volume
Volume
Volume
Control
Control
Orange
Control
Channel
Channel
A
B
Volume
White/
Control
N/A
N/A
Green
Channel
B
Brown Ground Ground Ground
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