USL CM-680 - Manual (Page 8)

CROSSOVER OUTPUTS TO POWER AMPLIFIER INPUTS
- 7 -
CM-680 I NSTRUCTION M ANUAL
Ultra Stereo Labs, Inc.
- 8 -
CM-680 I NSTRUCTION M ANUAL
Ultra Stereo Labs, Inc.
Installation
Mount the CM-680
The ideal place for the CM-680 Monitor is in the sound rack or
projector console between the stereo processor and power
amplifiers. DB25 and HD15 connectors are available on the back plane
to make installation quick and easy. Alternatively, terminal blocks allow
the use of stripped and tinned wire. They are pluggable for easy service
and trouble shooting.
Monitor Hookup
1. Power: Connect the unit to the AC power outlet using the standard
IEC cable provided. Any power source from 100-300VAC, 50-60 Hz
will be sufficient.
2. Monitor Inputs From Processor Outputs: Use the male-female
25 pin D cable to connect the output of the cinema processor to the
main input of the CM-680. If “EX” channels are to be used, then plug
an additional male-female 25 pin D cable from the “Optional Outputs”
at the processor to the “Optional Inputs” of the CM-680.
3. Crossover Outputs to Power Amplifier Inputs: The CM-680 utilizes
HD15 connectors that mate with several popular amplifiers. Plug one
end of the “VGA” HD15 cable into the chassis connector on the rear
of the CM-680. Plug the other end of the cable into the appropriate
amplifier. The VGA cable not only sends the CM-680 crossover signal
to the amplifiers, but also sends a power amp output signal back to the
CM-680 monitor. This vastly simplifies rack wiring. USL, Inc. stocks 2’,
4’ and 6’ long VGA cables. See figure #3
Terminal blocks are also provided on the back of the CM-680 chassis
to allow wiring to traditional amplifiers without the HD15 interface. All
crossover outputs are balanced. Please use two conductor shielded
cable to minimize ground loops and hum. Connect each of the crossover
channel outputs to the appropriate amplifier inputs.
4. Monitor Inputs From Power Amplifier Outputs: When VGA cables
are NOT being used, the amplifier outputs must be connected to
terminal blocks 2 & 3. Unshielded wire can be used to connect the
output of the amplifiers to the appropriate monitor speaker.
Inputs on the rear panel of the CM-680: All of these inputs are unbalanced
except for the subwoofer. See figure #2
NOTE: you must select “EX” or
NORMAL (non “EX”) channel routing
using the DIP switches on the rear
panel of the CM-680.
SIMPLE WIRING DIAGRAM WITH HD-15 CONNECTORS
MAIN AUDIO OUTPUTS
OPTION CARD I/O
L Biamp
C Biamp
R Biamp
Sw Amp
Ls/Rs Amp
Bsl/Bsr Amp
VGA Cables
DB-25 Cables
Cinema Processor
SWITCHES 1-4 ON NORMAL Ls/Rs
BYPASS POWER
12VAC @250mA
BARGRAPH LEVEL
Ll+
Ll-
Lh+
Lh-
E
Cl+
Cl-
Ch+
Ch-
E Rl+
Rl-
Rh+
Rh-
E
Swl+
Sw1-
Sw2+
Sw2-
E Ll+
Ll-
Lh+
Lh-
E
Cl+
Cl-
Ch+
Ch-
E Ls+
Ls-
Rs+
Rs-
E
Bsl+
Bsl-
Bsr+
Bsr-
E
E
Ll
Lh
COM
Cl
COM
Rl
Rh
COM
Ch
Ls
Rs
COM
Bsl
COM
Sw+
Sw-
COM
Bsr
Ll
Lh
Cl
Ch
Rl
Rh
Sw
1/2
Ls
Rs
Bsl
Bsr
CM-680
MONITOR/CROSSOVER
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. DO NOT REMOVE COVER. NO USER SERVICE- ABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. FOR CONTINUED PROTECTION AGAINST FIRE OR SHOCK HAZARD REPLACE ONLY WITH THE SAME FUSE TYPE AND RATING.
ON 1 2 3 4
AMPLIFIER LEVEL PROCESSOR LEVEL
1
15
1
15
1
15
1
15
1
15
1
15
1
25
1
25
90-240VAC 50-60 Hz
115V
230V
ON 1 2 3 4 5 6 7 8
ON 1 2 3 4
MONITOR INPUTS FROM
SWITCHES 5-8 ON “EX” CHANNELS Ls/Rs/Bsl/Bsr
OPTIONAL INPUTS FROM PROCESSOR OUTPUTS
WARNING: UNITS EQUIPPED WITH INTERNAL BYPASS CARD MUST HAVE INTERNAL DIP SWITCHES SET FOR PROPER CONFIGURATION
Figure 3
Note: Amplifier output terminal blocks are
NOT used when VGA cables are used