Usl CM-680 User manual

Film-Tech
The information contained in this Adobe Acrobat pdf
file is provided at your own risk and good judgment.
These manuals are designed to facilitate the
exchange of information related to cinema
projection and film handling, with no warranties nor
obligations from the authors, for qualified field
service engineers.
If you are not a qualified technician, please make no
adjustments to anything you may read about in these
Adobe manual downloads.
www.film-tech.com

CM-680
Monitor / Crossover
INSTRUCTION
MANUAL
181 Bonetti Drive
San Luis Obispo, CA 93 01
ph: 805-5 9-0161
fax: [phone]
e-mail:[email protected]
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
S ecifications
Inputs
Processor: Eight in uts corres onding to left, center, right, surround
left, surround right, back surround left, back surround right and subwoofer.
In ut im edance is 10k .
Power Amplifiers: Eleven in uts corres onding to left hi and lo, center hi
and lo, right hi and lo, surround left, surround right, back surround left, back
surround right and subwoofer. In ut im edance is greater than 50K
Controls
Front Panel: Individual ush button switches for each in ut
channel toggle on and off so that channels may be monitored in
any combination. An LED indicator illuminates when the corres onding
channel is selected. A volume control sets the s eaker out ut level and works
inde endently of the front anel VU bargra h meter. A ush-button switch
with corres onding LED switches monitoring between the Processor and
Am lifier in uts. A 12-segment bargra h VU Meter indicates the in ut level
from -40 to +3 VU.
Rear Panel: Three trim ots adjust the rocessor, am lifier and
VU meter in ut levels.
Power Requirements
100-300VAC, 50-60Hz, 32 Watts
Construction
The CM-680 Monitor is constructed of steel to minimize hum
icku and noise radiation. The overall size of the unit is 3.5"
x 19" x 9.625". The CM-680 is designed to mount in a standard rack
frame or cabinet.
CM-680
Weight: 10 lbs. 2 oz. (4.63 kg)
Shi ing weight: 16 lbs. (7.26kg)
Shi ing Size: 22 x 22 x 6 (558.8 x 558.8 x 152.4 mm)
 2002 All Rights Reserved
7/25/02
- 15 -
181 Bonetti Drive, San Luis Obispo, CA 93 01
ph: 805-5 9-0161 fax: [phone]
e-mail:[email protected]

- 1 -
One Year Limited Warranty
USL, Inc. warrants that each product manufactured by it will be
free from defects in material and workmanship under normal usage
for a period of one (1) year after its purchase new from an authori ed
dealer. Our obligation under this warranty is limited to repairing
or replacing any product or component which we are satisfied does
not conform with the foregoing warranty and which is returned to
our factory, freight paid, or serviced by one of our authori ed
contractors. The forgoing warranty is exclusive and in lieu of all
other warranties, whether expressed or implied. Such warranty
shall not apply to any product or component (A) repaired or altered
by anyone other than USL, Inc. or an authori ed service contractor;
(B) tampered with or altered in any way or subjected to misuse,
negligence or accident or (C) which has been improperly connected
installed or adjusted other than in accordance with USL, Inc.s
instruction.
- 14 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc. CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
SWITCH A SWITCH B SWITCH C
SWITCH D SWITCH E SWITCH F
BYPASS FOR PASSIVE OR EXTERNAL CROSSOVER
SWITCHES A-C ON **
TO USE DOLBY CP650 CROSSOVERS
SWITCHES D-F ON
** NOTE: TO FEED ONLY CHANNEL 1 OF THE HD15 CABLE
IN THE BYPASS MODE TURN ON ONLY THE FOLLOWIN :
SWITCH A 1&2, SWITCH B 1&2, SWITCH C 1&2
12
34
ON ON ON
ON
1212
1234
1234
12
Figure 8

- 13 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
- 2 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
Introduction .........................................................3
Front & Rear Panel Description............................5
Installation............................................................7
Crossover Setup...................................................11
Table o Contents
Please record the ollowing in ormation or your records:
Model: ___________________ Serial Number: ___________
Date o Purchase: __________ Purchased rom: __________
Speaker Crossover Frequency Time Delay
JBL 4675D 500Hz 1.8ms.
JBL 4670 800Hz 0.7ms,
JBL 5671 330Hz 1.4ms
JBL 5672 297Hz 1.8ms.
JBL 5674 297Hz 1.8ms
EV TS940 800Hz 0.7ms.
EV TS992LX 500HZ 1.8ms.
EV 9040 500Hz 1.8ms
EV Variplex 330Hz 1.4ms
EAW CB2591 500Hz 1.8ms
EAW CB259 800Hz 0.7ms
EAW CB253 350 0.7ms
1. Bypass Card XTB-680: When using external crossovers, the CM-680
must be equipped with a bypass card in the crossover slot. For connection
to a CP-650, slide dip switches D,E, & F on the XTB-680 to the ON
position. When using other electronic crossovers or speakers with passive
crossovers, turn DIP switches A,B & C to ON. See igure #8
Connect crossover inputs to rear o CM-680 at Ll, Cl &Rl as per Fig.4
(Page9)
Figure 7

- 3 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
- 12 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
Intro uction
Please read this entire manual before commencing your
installation.
The Ultra Stereo CM-680 Projection Booth Monitor has been
esigne for high performance, ease of use, an years of trouble free
service. Installation an setup of the monitors has been
consi erably simplifie . No special tools are require . The built in
VU meter an test jack give the technician imme iate information
about the status of the processor an all power amplifiers.
All controls necessary for aily operation of the processor are
easily accessible on the front panel. The components that make
up the CM-680 monitors are of computer gra e for reliability. All
front panel controls are in ivi ually seale for long life. All
Ultra Stereo equipment has been burne -in at the factory for
an exten e perio in or er to eliminate the possibility of
premature failure. Unpack the unit carefully. If the container has
been amage , thoroughly inspect the equipment to make
certain that there is no hi en amage. File a claim imme iately
with the carrier if any amage is foun . Also a vise your ealer
or the factory.
Small, stan ar
screw river
No. 2 Phillips
screw river
Trimpot
a justment
tool
Wire
Strippers
TOOLS REQUIRED All
Switches
On:
330 Hz
All
Switches
On:
500 Hz
All
Switches
On:
800 Hz
TIME DELAY
All
Switches
On:
1.4ms
All
Switches
On:
1.8ms
All
Switches
Off:
297 Hz
All
Switches
Off:
0.7ms
Llo Lhi Clo Chi Rlo Rhi
HORN EQ
1-3 ON
SCREEN EQ
4-6 ON
330hz 330hz 330hz
500hz 500hz
500hz
800hz 800hz 800hz
1.4ms 1.8ms 1.4ms 1.8ms 1.4ms 1.8ms
LEFT CENTER RIGHT
Normal/Bypass Switch an LEDs
Crossover
Output
Levels
LEFT CENTER RIGHT
Bypass
Xover
Levels
Screen EQ
4-6 On/Off
Horn EQ
1-3 On/Off
CROSSOVER
FREQUENCY
igure 6

- 11 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
- 4 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
You will need to supply the following materials:
 S ielded audio cable for connecting t e CM-680 to t e
cinema processor and power amplifier outputs.
 Four 10-32 x 1/2" screws to mount t e CM-680 in t e audio
equipment rack.
FEATURES
The CM- 80 monitor has the following standard features:
 Eig t-C annel Monitoring - allows you to monitor eit er t e
processor or power amplifier outputs to left, center, rig t,
surround left, surround rig t, back surround left, back surround
rig t and subwoofer c annels, in any combination via t e switc
on t e front panel (see illustration on pg. 5 - switc 5)
 Input levels from processor and power amplifier can be
adjusted independently - no uge level jumps w en switc ing
between processor and power amplifiers.
 Bargrap display may be calibrated to t e reference level
for your t eatre  t e projectionist can see auditorium levels
instantly.
 Designed to work wit bi-amplified sound systems to
monitor t e ig and low frequency outputs from t e left,
center and rig t c annels.
Crossover Setup
Analog Crossover Card XTA- 80: W en using t e USL, Inc. Crossover
card, t e following parameters must be set: time delay, crossover frequency,
orn EQ, Screen EQ and output levels. See figure #6.
Make sure t e NORMAL/BYPASS switc is set in t e NORMAL position.
Determine t e model number of t e speaker system being used. (Figure #7
as a listing of several popular cinema loudspeakers.)
If your loudspeaker requires a 1.8 ms delay, turn ON all DIP switc es on
t e first row marked 1.8 ms. Refer to figure #7. Likewise a loudspeaker
requiring 1.4 ms delay s ould require all t e DIP switc es in t e second row
to be turned ON.
For loudspeakers requiring only 0.7 ms delay, leave all t e time delay DIP
switc es OFF. Never turn on both rows of time Delay switches!
Next, set t e crossover frequency. For 800Hz, turn all t e crossover frequency
DIP switc es in t e first row ON. For 500Hz, turn all t e DIP switc es in
t e second row ON. For 330Hz, turn all t e DIP switc es in t e t ird row
ON. For 297 Hz, leave all t e crossover frequency DIP switc es OFF.
Never turn on more than one row of DIP switches.
Now, set t e orn EQ and screen EQ DIP switc es. Generally, all six DIP
switc es s ould be ON. In some cinemas, t e left and rig t speakers are
mounted outside t e screen area. In t is case, turn t e left and rig t screen
EQ switc es to OFF. Some ig frequency orns are very flat to 20kHz.
In t is case, you may want to turn t e orn EQ switc es to OFF. T e orn
and screen EQ eac provide about 8dB of boost at 20kHz. T e combination
of orn and screen EQ results in about 16 dB boost at 20kHz.
Finally, set t e output levels. Using a Real Time Analyzer and feeding a pink
noise signal from t e cinema processor, set t e appropriate ten turn pots
for a flat response around t e crossover frequency and a total SPL level of
85 on eac of t e front t ree c annels. T ere s ould be enoug range in
t e output pots to allow setting t e amplifier gains at maximum or at t e 12
Oclock position.
T e bypass crossover is fixed at about 500 Hz wit no time delay. Using a
Real Time Analyzer and feeding pink noise from t e center c annel of t e
cinema processor, set t e bypass levels for flat response around 500 Hz
and an SPL level of 85. T e NORMAL/BYPASS switc will need to be set
in BYPASS.

- 5 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
- 10 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
CM-680 Front anel
PROCESSOR AMPLIFIERS
VOLUME
28
3
1
7
9
10
0
456
CHANNEL SELECT
VU
TEST
POWER
LCRSW
Ls Rs BSl BS
CM-680
EIGHT CHANNEL MONITOR/XOVER
+3 +2 +1
0
-1 -3 -5 -7
-10
-20 -30 -40
12345678 9
1. Channel select buttons - pressing a Channel Select Button causes the corresponding LED to illuminate and the signal from that channel to be monitored. Any combination of eight channels can be selected. 2. Internal Digital or Analog Crossover Access Cover. 3. Crossover Bypass Switch - Switching this will cause the internal crossover to be bypassed or engaged and the condition will be indicated by its appropriate LED. 4. Volume Control - controls the volume of the internal or external speaker. The volume control has no effect on the VU Bargraph display. 5. rocessor/Amplifier Selector Switch - selects either the inputs from the cinema processor or power amplifiers for monitoring. 6. VU Bargraph - displays the level of the selected channels. The VU Bargraph may be calibrated by the rear panel trim adjustment (Figure 2). The VU Bargraph operates independently of the volume control (4). 7. Test Jack - permits monitoring of the audio output of the CM-680. Inserting a mono or stereo 1/4 phone plug here disables the internal speaker and routes the audio output to the Test Jack. Do not connect any device here with less than 8 Ohms impedance. 8. Internal Speaker 9. ower Switch
Pin # Function
1 GND
2 Left
3 N/C
4 N/C
5 Center
6 N/C
7 N/C
8 Right
9 N/C
10 GND
11 GND
12 GND
13 N/C
14 GND
15 Left LF
16 Left HF
17 GND
18 Right LF
19 Right HF
20 GND
21 Center LF
22 Center HF
23 Surr L
24 Surr R
25 Sub
Main
Processor
Outputs
N/C
N/C
Bsl
N/C
N/C
Bsr
Chassis Gnd
N/C
N/C
Ls
Rs
N/C
N/C
N/C
N/C
Bsl +
N/C
N/C
Bsr +
N/C
N/C
N/C
Ls +
Rs +
N/C
Optional
Processor
Outputs
Function
DB 25
Connector Pinout
Setting Monitor and Bargraph Levels:
Set the processor main fader and amplifier levels so the house speakers
are playing back at the normal listening level. Select some source material
like pink noise.
Set the  rocessor/Amplifier switch to  rocessor. With the monitor
volume to 7, adjust the  rocessor trimpot for a comfortable listening
level. Set the bargraph trimpot for a reading in the middle range.
Set the  rocessor/Amplifier switch to Amplifier, adjust the amplifier
trimpot so the level matches the processor level.
Figure 1
Figure 5
CM-680 HD 15 pin outs
Typical per connector
in # Name in # Name in # Name
1 Band A (1), - 6 Chassis Gnd 11 Band B (2), -
Signal Signal
2 NC 7 Band A (1), + Signal 12 NC
3 Band A, Vmon 8 Band B (2), + Signal 13 Band B, Vmon
(Amp returns) (Amp returns)
4 Band A, Imon 9 NC 14 Band B, Imon
5 NC 10 Signal Ground 15 NC

- 9 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
- 6 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
CM-680 Rear Panel
1. Ma n AC connector w th fuse. 2. Ampl f er outputs - connect to the power ampl f er speaker outputs correspond ng to Ls, Rs, Bsl, Bsr and Sw channels. 3. Ampl f er outputs - connect to the power ampl f er speaker outputs correspond ng to Lh, Ll, Ch, Cl and Rh, Rl. 4. Ampl f er level - th s tr mpot adjusts the level of the nput l nes com ng from the Power Ampl f ers. 5. HD-15 connector - connect to Ls/Rs ampl f er. 6. HD-15 connector - connect to Bsl/Bsr ampl f er. 7. Processor level - th s tr mpot adjusts the level of the nput l nes com ng from the processor. 8. Crossover outputs - connect to the power ampl f er nputs correspond ng to Ls, Rs, Bsl and Bsr. 9. HD-15 connector - connect to Rl/Rh ampl f er. 10. HD-15 connector - connect to Sw ampl f er. 11. Crossover outputs - connect to the power ampl f er nputs correspond ng to Rl, Rh and Sw. 12. HD-15 connector - connect to Ll/Lh ampl f er. 13. HD-15 connector - connect to Cl/Ch ampl f er. 14. Crossover outputs - connect to the power ampl f er nputs correspond ng to Ll/Lh and Cl/Ch ampl f er. 15. Opt onal nput - connect these to the EX outputs of the processor 16. Bargraph level - th s tr mpot adjusts the sens t v ty of the front panel VU Bargraph. 17. Ma n nput - connect th s to the ma n outputs of the processor. 18. AC Emergency power nput - 12-16VAC, 0.5A 19. EX Selector sw tch - w thout EX, turn on 1-4 sw tches. W th EX, turn on 5-8 sw tches. Th s routes the correct Ls/Rs nputs to the CM-680 c rcu try.
SWITCHES 1-4
ON
NORMAL Ls/Rs
12345678910111213 14 15 16
BYPASS
POWER
12VAC
@250mA
BARGRAPH
LEVEL
Ll+ Ll- L + L - E Cl+ Cl- C + C - E
Rl+ Rl- R + R - E
Swl+ Sw1- Sw2+ Sw2-
E
Ll+ Ll- L + L - E Cl+ Cl- C + C - E
Ls+ Ls-
Rs+ Rs-
E Bsl+
Bsl-
Bsr+
Bsr-
E E
Ll L COM Cl COM Rl R COM C
Ls
Rs
COM Bsl
COM
Sw+
Sw-
COM Bsr
Ll
L
Cl
C
Rl
R
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
1234
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
17 18 19
ON
1 2 3 4
5678
ON
1 2 3 4
10
MONITOR INPUTS FROM CROSSOVER OUTPUTS TO POWER AMPLIFIER INPUTS
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
MAIN INPUTS FROM PROCESSOR OUTPUTS
MAIN AUDIO OUTPUTS
OPTION CARD I/O
L
B amp
C
B amp
R
B amp
Sw
Amp
Ls/Rs
Amp
Bsl/Bsr
Amp
DB-25 Cables
C nema Processor
SWITCHES 1-4
ON
NORMAL Ls/Rs
BYPASS
POWER
12VAC
@250mA
BARGRAPH
LEVEL
Ll+
Ll-
L +
L -
E
Cl+
Cl-
C +
C -
E
Rl+
Rl-
R +
R -
E
Swl+
Sw1-
Sw2+
Sw2-
E
Ll+
Ll-
L +
L -
E
Cl+
Cl-
C +
C -
E
Ls+
Ls-
Rs+
Rs-
E
Bsl+
Bsl-
Bsr+
Bsr-
E
E
Ll
L
COM
Cl
COM
Rl
R
COM
C
Ls
Rs
COM
Bsl
COM
Sw+
Sw-
COM
Bsr
Ll
L
Cl
C
Rl
R
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
1234
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
5678
ON
1 2 3 4
MONITOR INPUTS FROM CROSSOVER OUTPUTS TO POWER AMPLIFIER INPUTS
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
LR
LR
LR
LR
LR
LR
TERMINAL WIRING DIAGRAM
Figure 2
Figure 4
NOTE: There are two dent cal subwoofer outputs (SW1 & SW2)
wh ch can be used

CROSSOVER OUTPUTS TO POWER AMPLIFIER INPUTS
- 7 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
- 8 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
Installation
Mount the CM-680
The i eal place for the CM-680 Monitor is in the soun rack or
projector console between the stereo processor an power
amplifiers. DB25 an HD15 connectors are available on the back plane
to make installation quick an easy. Alternatively, terminal blocks allow
the use of strippe an tinne wire. They are pluggable for easy service
an trouble shooting.
Monitor Hooku
1. Power: Connect the unit to the AC power outlet using the stan ar
IEC cable provi e . Any power source from 100-300VAC, 50-60 Hz
will be sufficient.
2. Monitor In uts From Processor Out uts: 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 use , then plug
an a itional male-female 25 pin D cable from the Optional Outputs
at the processor to the Optional Inputs of the CM-680.
3. Crossover Out uts to Power Am lifier In uts: The CM-680 utilizes
HD15 connectors that mate with several popular amplifiers. Plug one
en of the VGA HD15 cable into the chassis connector on the rear
of the CM-680. Plug the other en of the cable into the appropriate
amplifier. The VGA cable not only sen s the CM-680 crossover signal
to the amplifiers, but also sen s a power amp output signal back to the
CM-680 monitor. This vastly simplifies rack wiring. USL, Inc. stocks 2,
4 an 6 long VGA cables. See figure #3
Terminal blocks are also provi e on the back of the CM-680 chassis
to allow wiring to tra itional amplifiers without the HD15 interface. All
crossover outputs are balance . Please use two con uctor shiel e
cable to minimize groun loops an hum. Connect each of the crossover
channel outputs to the appropriate amplifier inputs.
4. Monitor In uts From Power Am lifier Out uts: When VGA cables
are NOT being used, the amplifier outputs must be connected to
terminal blocks 2 & 3. Unshiel e wire can be use 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 unbalance
except for the subwoofer. See figure #2
NOTE: you must select EX or
NORMAL (non EX) channel routing
using the D P 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
1234
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
5678
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 use when VGA cables are use

CROSSOVER OUTPUTS TO POWER AMPLIFIER INPUTS
- 7 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
- 8 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
Installation
Mount the CM-680
The i eal place for the CM-680 Monitor is in the soun rack or
projector console between the stereo processor an power
amplifiers. DB25 an HD15 connectors are available on the back plane
to make installation quick an easy. Alternatively, terminal blocks allow
the use of strippe an tinne wire. They are pluggable for easy service
an trouble shooting.
Monitor Hooku
1. Power: Connect the unit to the AC power outlet using the stan ar
IEC cable provi e . Any power source from 100-300VAC, 50-60 Hz
will be sufficient.
2. Monitor In uts From Processor Out uts: 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 use , then plug
an a itional male-female 25 pin D cable from the Optional Outputs
at the processor to the Optional Inputs of the CM-680.
3. Crossover Out uts to Power Am lifier In uts: The CM-680 utilizes
HD15 connectors that mate with several popular amplifiers. Plug one
en of the VGA HD15 cable into the chassis connector on the rear
of the CM-680. Plug the other en of the cable into the appropriate
amplifier. The VGA cable not only sen s the CM-680 crossover signal
to the amplifiers, but also sen s a power amp output signal back to the
CM-680 monitor. This vastly simplifies rack wiring. USL, Inc. stocks 2,
4 an 6 long VGA cables. See figure #3
Terminal blocks are also provi e on the back of the CM-680 chassis
to allow wiring to tra itional amplifiers without the HD15 interface. All
crossover outputs are balance . Please use two con uctor shiel e
cable to minimize groun loops an hum. Connect each of the crossover
channel outputs to the appropriate amplifier inputs.
4. Monitor In uts From Power Am lifier Out uts: When VGA cables
are NOT being used, the amplifier outputs must be connected to
terminal blocks 2 & 3. Unshiel e wire can be use 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 unbalance
except for the subwoofer. See figure #2
NOTE: you must select EX or
NORMAL (non EX) channel routing
using the D P 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
1234
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
5678
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 use when VGA cables are use

- 9 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
- 6 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
CM-680 Rear Panel
1. Ma n AC connector w th fuse. 2. Ampl f er outputs - connect to the power ampl f er speaker outputs correspond ng to Ls, Rs, Bsl, Bsr and Sw channels. 3. Ampl f er outputs - connect to the power ampl f er speaker outputs correspond ng to Lh, Ll, Ch, Cl and Rh, Rl. 4. Ampl f er level - th s tr mpot adjusts the level of the nput l nes com ng from the Power Ampl f ers. 5. HD-15 connector - connect to Ls/Rs ampl f er. 6. HD-15 connector - connect to Bsl/Bsr ampl f er. 7. Processor level - th s tr mpot adjusts the level of the nput l nes com ng from the processor. 8. Crossover outputs - connect to the power ampl f er nputs correspond ng to Ls, Rs, Bsl and Bsr. 9. HD-15 connector - connect to Rl/Rh ampl f er. 10. HD-15 connector - connect to Sw ampl f er. 11. Crossover outputs - connect to the power ampl f er nputs correspond ng to Rl, Rh and Sw. 12. HD-15 connector - connect to Ll/Lh ampl f er. 13. HD-15 connector - connect to Cl/Ch ampl f er. 14. Crossover outputs - connect to the power ampl f er nputs correspond ng to Ll/Lh and Cl/Ch ampl f er. 15. Opt onal nput - connect these to the EX outputs of the processor 16. Bargraph level - th s tr mpot adjusts the sens t v ty of the front panel VU Bargraph. 17. Ma n nput - connect th s to the ma n outputs of the processor. 18. AC Emergency power nput - 12-16VAC, 0.5A 19. EX Selector sw tch - w thout EX, turn on 1-4 sw tches. W th EX, turn on 5-8 sw tches. Th s routes the correct Ls/Rs nputs to the CM-680 c rcu try.
SWITCHES 1-4
ON
NORMAL Ls/Rs
12345678910111213 14 15 16
BYPASS
POWER
12VAC
@250mA
BARGRAPH
LEVEL
Ll+ Ll- L + L - E Cl+ Cl- C + C - E
Rl+ Rl- R + R - E
Swl+ Sw1- Sw2+ Sw2-
E
Ll+ Ll- L + L - E Cl+ Cl- C + C - E
Ls+ Ls-
Rs+ Rs-
E Bsl+
Bsl-
Bsr+
Bsr-
E E
Ll L COM Cl COM Rl R COM C
Ls
Rs
COM Bsl
COM
Sw+
Sw-
COM Bsr
Ll
L
Cl
C
Rl
R
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
1234
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
17 18 19
ON
1 2 3 4
5678
ON
1 2 3 4
10
MONITOR INPUTS FROM CROSSOVER OUTPUTS TO POWER AMPLIFIER INPUTS
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
MAIN INPUTS FROM PROCESSOR OUTPUTS
MAIN AUDIO OUTPUTS
OPTION CARD I/O
L
B amp
C
B amp
R
B amp
Sw
Amp
Ls/Rs
Amp
Bsl/Bsr
Amp
DB-25 Cables
C nema Processor
SWITCHES 1-4
ON
NORMAL Ls/Rs
BYPASS
POWER
12VAC
@250mA
BARGRAPH
LEVEL
Ll+
Ll-
L +
L -
E
Cl+
Cl-
C +
C -
E
Rl+
Rl-
R +
R -
E
Swl+
Sw1-
Sw2+
Sw2-
E
Ll+
Ll-
L +
L -
E
Cl+
Cl-
C +
C -
E
Ls+
Ls-
Rs+
Rs-
E
Bsl+
Bsl-
Bsr+
Bsr-
E
E
Ll
L
COM
Cl
COM
Rl
R
COM
C
Ls
Rs
COM
Bsl
COM
Sw+
Sw-
COM
Bsr
Ll
L
Cl
C
Rl
R
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
1234
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
5678
ON
1 2 3 4
MONITOR INPUTS FROM CROSSOVER OUTPUTS TO POWER AMPLIFIER INPUTS
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
LR
LR
LR
LR
LR
LR
TERMINAL WIRING DIAGRAM
Figure 2
Figure 4
NOTE: There are two dent cal subwoofer outputs (SW1 & SW2)
wh ch can be used

-
1
0
-
CM-680 INSTRUCTIONMANUALUltraStereo Labs,Inc.
Pin#Function
1GND
2L+
3N/C
4GND
5C+
6N/C
7GND
8R+
9GND
10 LS-
11 RS-
12 SW-
13 GND
14 L-
15 N/C
16 N/C
17 C-
18 N/C
19 N/C
20 R-
21 N/C
22 GND
23 LS+
24 RS+
25 SW+
Main
Processor
Outputs
N/C
N/C
Bsl-
N/C
Ch+
Bsr-
GND
Rh+
N/C
Ls-
Rs-
Lh -
N/C
N/C
N/C
Bsl+
Ch-
N/C
Bsr+
Rh-
N/C
N/C
Ls+
Rs+
Lh +
Optional
Processor
Outputs
Function
DB-25
ConnectorPinout
Setting Monitorand Bargraph Levels:
Setthe processormainfaderand amplifierlevelssothe housespeakers
areplaying back atthe normallistening level.Selectsomesourcematerial
likepinknoise.
Setthe “Processor/Amplifier” switchto“Processor”.Withthe monitor
volumeto“7”,adjustthe “Processor” trimpotforacomfortablelistening
level.Setthe bargraph trimpotforareading inthe middlerange.
Setthe “Processor/Amplifier” switchto“Amplifier”,adjustthe amplifier
trimpotsothe levelmatchesthe processorlevel.
Figure5
CM-680 HD 15 pinouts
Typicalperconnector
Pin#NamePin#NamePin#Name
1Band A(1),-6ChassisGnd 11 Band B(2),-
SignalSignal
2NC 7Band A(1),+Signal12 NC
3Band A,Vmon 8Band B(2),+Signal13 Band B,Vmon
(Ampreturns)(Ampreturns)
4Band A,Imon 9NC 14 Band B,Imon
5NC 10 SignalGround 15 NC

- 11 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
- 4 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
You will need to supply the following materials:
 S ielded audio cable for connecting t e CM-680 to t e
cinema processor and power amplifier outputs.
 Four 10-32 x 1/2" screws to mount t e CM-680 in t e audio
equipment rack.
FEATURES
The CM- 80 monitor has the following standard features:
 Eig t-C annel Monitoring - allows you to monitor eit er t e
processor or power amplifier outputs to left, center, rig t,
surround left, surround rig t, back surround left, back surround
rig t and subwoofer c annels, in any combination via t e switc
on t e front panel (see illustration on pg. 5 - switc 5)
 Input levels from processor and power amplifier can be
adjusted independently - no uge level jumps w en switc ing
between processor and power amplifiers.
 Bargrap display may be calibrated to t e reference level
for your t eatre  t e projectionist can see auditorium levels
instantly.
 Designed to work wit bi-amplified sound systems to
monitor t e ig and low frequency outputs from t e left,
center and rig t c annels.
Crossover Setup
Analog Crossover Card XTA- 80: W en using t e USL, Inc. Crossover
card, t e following parameters must be set: time delay, crossover frequency,
orn EQ, Screen EQ and output levels. See figure #6.
Make sure t e NORMAL/BYPASS switc is set in t e NORMAL position.
Determine t e model number of t e speaker system being used. (Figure #7
as a listing of several popular cinema loudspeakers.)
If your loudspeaker requires a 1.8 ms delay, turn ON all DIP switc es on
t e first row marked 1.8 ms. Refer to figure #7. Likewise a loudspeaker
requiring 1.4 ms delay s ould require all t e DIP switc es in t e second row
to be turned ON.
For loudspeakers requiring only 0.7 ms delay, leave all t e time delay DIP
switc es OFF. Never turn on both rows of time Delay switches!
Next, set t e crossover frequency. For 800Hz, turn all t e crossover frequency
DIP switc es in t e first row ON. For 500Hz, turn all t e DIP switc es in
t e second row ON. For 330Hz, turn all t e DIP switc es in t e t ird row
ON. For 297 Hz, leave all t e crossover frequency DIP switc es OFF.
Never turn on more than one row of DIP switches.
Now, set t e orn EQ and screen EQ DIP switc es. Generally, all six DIP
switc es s ould be ON. In some cinemas, t e left and rig t speakers are
mounted outside t e screen area. In t is case, turn t e left and rig t screen
EQ switc es to OFF. Some ig frequency orns are very flat to 20kHz.
In t is case, you may want to turn t e orn EQ switc es to OFF. T e orn
and screen EQ eac provide about 8dB of boost at 20kHz. T e combination
of orn and screen EQ results in about 16 dB boost at 20kHz.
Finally, set t e output levels. Using a Real Time Analyzer and feeding a pink
noise signal from t e cinema processor, set t e appropriate ten turn pots
for a flat response around t e crossover frequency and a total SPL level of
85 on eac of t e front t ree c annels. T ere s ould be enoug range in
t e output pots to allow setting t e amplifier gains at maximum or at t e 12
Oclock position.
T e bypass crossover is fixed at about 500 Hz wit no time delay. Using a
Real Time Analyzer and feeding pink noise from t e center c annel of t e
cinema processor, set t e bypass levels for flat response around 500 Hz
and an SPL level of 85. T e NORMAL/BYPASS switc will need to be set
in BYPASS.

- 3 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
- 12 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
Intro uction
Please read this entire manual before commencing your
installation.
The Ultra Stereo CM-680 Projection Booth Monitor has been
esigne for high performance, ease of use, an years of trouble free
service. Installation an setup of the monitors has been
consi erably simplifie . No special tools are require . The built in
VU meter an test jack give the technician imme iate information
about the status of the processor an all power amplifiers.
All controls necessary for aily operation of the processor are
easily accessible on the front panel. The components that make
up the CM-680 monitors are of computer gra e for reliability. All
front panel controls are in ivi ually seale for long life. All
Ultra Stereo equipment has been burne -in at the factory for
an exten e perio in or er to eliminate the possibility of
premature failure. Unpack the unit carefully. If the container has
been amage , thoroughly inspect the equipment to make
certain that there is no hi en amage. File a claim imme iately
with the carrier if any amage is foun . Also a vise your ealer
or the factory.
Small, stan ar
screw river
No. 2 Phillips
screw river
Trimpot
a justment
tool
Wire
Strippers
TOOLS REQUIRED All
Switches
On:
330 Hz
All
Switches
On:
500 Hz
All
Switches
On:
800 Hz
TIME DELAY
All
Switches
On:
1.4ms
All
Switches
On:
1.8ms
All
Switches
Off:
297 Hz
All
Switches
Off:
0.7ms
Llo Lhi Clo Chi Rlo Rhi
HORN EQ
1-3 ON
SCREEN EQ
4-6 ON
330hz 330hz 330hz
500hz 500hz
500hz
800hz 800hz 800hz
1.4ms 1.8ms 1.4ms 1.8ms 1.4ms 1.8ms
LEFT CENTER RIGHT
Normal/Bypass Switch an LEDs
Crossover
Output
Levels
LEFT CENTER RIGHT
Bypass
Xover
Levels
Screen EQ
4-6 On/Off
Horn EQ
1-3 On/Off
CROSSOVER
FREQUENCY
igure 6

- 13 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
- 2 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
Introduction .........................................................3
Front & Rear Panel Description............................5
Installation............................................................7
Crossover Setup...................................................11
Table o Contents
Please record the ollowing in ormation or your records:
Model: ___________________ Serial Number: ___________
Date o Purchase: __________ Purchased rom: __________
Speaker Crossover Frequency Time Delay
JBL 4675D 500Hz 1.8ms.
JBL 4670 800Hz 0.7ms,
JBL 5671 330Hz 1.4ms
JBL 5672 297Hz 1.8ms.
JBL 5674 297Hz 1.8ms
EV TS940 800Hz 0.7ms.
EV TS992LX 500HZ 1.8ms.
EV 9040 500Hz 1.8ms
EV Variplex 330Hz 1.4ms
EAW CB2591 500Hz 1.8ms
EAW CB259 800Hz 0.7ms
EAW CB253 350 0.7ms
1. Bypass Card XTB-680: When using external crossovers, the CM-680
must be equipped with a bypass card in the crossover slot. For connection
to a CP-650, slide dip switches D,E, & F on the XTB-680 to the ON
position. When using other electronic crossovers or speakers with passive
crossovers, turn DIP switches A,B & C to ON. See igure #8
Connect crossover inputs to rear o CM-680 at Ll, Cl &Rl as per Fig.4
(Page9)
Figure 7

- 1 -
One Year Limited Warranty
USL, Inc. warrants that each product manufactured by it will be
free from defects in material and workmanship under normal usage
for a period of one (1) year after its purchase new from an authori ed
dealer. Our obligation under this warranty is limited to repairing
or replacing any product or component which we are satisfied does
not conform with the foregoing warranty and which is returned to
our factory, freight paid, or serviced by one of our authori ed
contractors. The forgoing warranty is exclusive and in lieu of all
other warranties, whether expressed or implied. Such warranty
shall not apply to any product or component (A) repaired or altered
by anyone other than USL, Inc. or an authori ed service contractor;
(B) tampered with or altered in any way or subjected to misuse,
negligence or accident or (C) which has been improperly connected
installed or adjusted other than in accordance with USL, Inc.s
instruction.
- 14 -
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc. CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
SWITCH A SWITCH B SWITCH C
SWITCH D SWITCH E SWITCH F
BYPASS FOR PASSIVE OR EXTERNAL CROSSOVER
SWITCHES A-C ON **
TO USE DOLBY CP650 CROSSOVERS
SWITCHES D-F ON
** NOTE: TO FEED ONLY CHANNEL 1 OF THE HD15 CABLE
IN THE BYPASS MODE TURN ON ONLY THE FOLLOWIN :
SWITCH A 1&2, SWITCH B 1&2, SWITCH C 1&2
12
34
ON ON ON
ON
1212
1234
1234
12
Figure 8

CM-680
Monitor / Crossover
INSTRUCTION
MANUAL
181 Bonetti Drive
San Luis Obispo, CA 93 01
ph: 805-5 9-0161
fax: [phone]
e-mail:[email protected]
CM-680 INSTRUCTION MANUAL Ultra Stereo Labs, Inc.
S ecifications
Inputs
Processor: Eight in uts corres onding to left, center, right, surround
left, surround right, back surround left, back surround right and subwoofer.
In ut im edance is 10k .
Power Amplifiers: Eleven in uts corres onding to left hi and lo, center hi
and lo, right hi and lo, surround left, surround right, back surround left, back
surround right and subwoofer. In ut im edance is greater than 50K
Controls
Front Panel: Individual ush button switches for each in ut
channel toggle on and off so that channels may be monitored in
any combination. An LED indicator illuminates when the corres onding
channel is selected. A volume control sets the s eaker out ut level and works
inde endently of the front anel VU bargra h meter. A ush-button switch
with corres onding LED switches monitoring between the Processor and
Am lifier in uts. A 12-segment bargra h VU Meter indicates the in ut level
from -40 to +3 VU.
Rear Panel: Three trim ots adjust the rocessor, am lifier and
VU meter in ut levels.
Power Requirements
100-300VAC, 50-60Hz, 32 Watts
Construction
The CM-680 Monitor is constructed of steel to minimize hum
icku and noise radiation. The overall size of the unit is 3.5"
x 19" x 9.625". The CM-680 is designed to mount in a standard rack
frame or cabinet.
CM-680
Weight: 10 lbs. 2 oz. (4.63 kg)
Shi ing weight: 16 lbs. (7.26kg)
Shi ing Size: 22 x 22 x 6 (558.8 x 558.8 x 152.4 mm)
 2002 All Rights Reserved
7/25/02
- 15 -
181 Bonetti Drive, San Luis Obispo, CA 93 01
ph: 805-5 9-0161 fax: [phone]
e-mail:[email protected]