Early ISC Speaker Processor
Owner's Information - all models ©2004 ARX®
CHANNEL A
ISC RETURNS
CHANNEL B
ISC
LEADS
FROM
CH. A
ISC
LEADS
FROM
CH. B
OUT TO
HIGH AMP
IN CH. B
OUT TO
LOW
AMP IN
CH. B
IN
FROM
CONSOLE
OUT TO
HIGH AMP
IN CH. A
OUT TO
LOW AMP
IN CH. A
IN
FROM
CONSOLE
OUT TO
LOW
AMP IN
CH. B
OUT TO
LOW
AMP IN
CH. A
IN
FROM
CONSOLE
ISC
LEADS
FROM
CH. A
ISC
LEADS
FROM
CH. B
CHANNEL A
CHANNEL B
ISC
LEADS
FROM
CH. A
ISC
LEADS
FROM
CH. B
OUT TO
HIGH
AMP IN
CH. B
OUT TO
MID
AMP IN
CH. B
IN
FROM
CU118S
OUT TO
HIGH
AMP IN
CH. A
OUT TO
MID
AMP IN
CH. A
IN
FROM
CU118S
ISC RETURNS
OUT TO
MID/HIGH
AMP IN
CH. A
OUT TO
MID/HIGH
AMP IN
CH. B
CHANNEL A
ISC RETURNS
CHANNEL B
CU 912/922S REAR PANEL
CU 212S REAR PANEL
AC POWER
INPUT AND FUSE.
CHECK FOR
CORRECT
VOLTAGE
AC POWER
INPUT AND FUSE.
CHECK FOR
CORRECT
VOLTAGE
AC POWER
INPUT AND FUSE.
CHECK FOR
CORRECT
VOLTAGE
CU 215S REAR PANEL
Part B - Sub Bass Systems
Channel A level trim
This control lets you adjust the input level to the Channel A circuitry. During normal operation it is set at the maximum
(10) position. This is an attenuator only, not a gain control. Setting this level too low may reduce the headroom in the
preceding equipment.
Normal/Reverse LEDs
These LEDs indicate the status of the Phase Reverse switch. Also, either one lit up indicates that the Control Unit is
connected to the AC power.
Phase Reverse switch
This switch changes the Low Frequency output phase of the CU 118s by 180
o
Normal/Sub switch
In the Normal position, the CU 118s covers Low frequencies from 250 Hz downwards. In the Sub posiion, it covers Low
frequencies from 90 Hz downwards. Use Normal position when using it in conjunction with the CU 212s control unit,
and Sub position when using it for Low frequency enhancement of other systems.
Level control
This control determines the Low Frequency output of your system. During normal operation it is set at UNITY,the 0 dB
nominal operating position (12 o’clock). It also provides up to +6 dB of gain past unity.
ISC LED
This LED indicates that the Interactive System Control protection circuitry is operating on the Channel A output. During
normal operation this LED will light up on transients or peaks if the system is being used to achieve high SPL. However,
if this LED is on for the
majority
of the time, then the Low level is too high and should be reduced accordingly.
Rear Panel Configurations
