Early ISC Speaker Processor
Owner's Information - all models ©2004 ARX®
CU118s
Input Impedance
Balanced 20 Kohms
Unbalanced 10 Kohms
Input Headroom
+21 dB
CMRR
>50dB, 20 Hz - 20 KHz
Output Impedance
150 ohms
Output Level (Max)
+20 dB
Filter Type
Linkwitz-Riley state variable
24dB per Octave
Frequency Response
200 Hz to 20 KHz.
Note: RFI filter -6dB 100KHz
Signal to Noise Ratio
-90dB Unweighted
-93dB A weighted
Distortion
.004% @ 0dB, 1 KHz
Dynamic Range
111dB
Input Connectors
Female XLR; Pin 1 Ground,
Pin 2 + (Hot)
Pin 3 - (Cold)
Output Connectors
Male XLR; Pin 1 Ground,
Pin 2 + (Hot)
Pin 3 - (Cold)
Power Requirements
220/240 - 100/120 V AC 50/60
Hz, 8 watts (8 VA)
Weight
5 lb/2.2 Kg
Dimensions
19"W x 1¾"H x 6"D
482 x 44 x 155 mm
PowerPro
Input Impedance
20 Kohms electronically balanced
Maximum Input Level
+20dB
CMRR
>50 dB, @ 1 KHz
Output Impedance
300 ohms electronically balanced
Maximum Output Level
+22dB
Signal to Noise ratio
90 dB, unweighted
Dynamic Range
110 dB
Distortion (THD)
.008% @ +4 dB, 1 KHz
Crossover Frequency
-3dB @100Hz (to SUB out)
HighPass Filters (-3dB point)
35 Hz SUB output
60 Hz A/B outputs
ISC Returns
Differential Inputs,
22 KOhms impedance,
hard wired to chassis
Input Connector type
Balanced 3 pin XLR
Output Connector type
Balanced 3 pin XLR
Power Requirements
100/120 - 220/240 V AC, 50/60
Hz, 8VA (8 watts)
Weight
5 lbs/2.2 Kg
Dimensions
19"W x 1¾"H x 6"D
482 x 44 x 155mm
CU212s
Input Impedance
Balanced 20 Kohms
Unbalanced 10 Kohms
Input Headroom
+21 dB
CMRR
>50dB, 20 Hz - 20 KHz
Output Impedance
150 ohms
Output Level (Max)
+20 dB
Filter Type
Linkwitz-Riley state variable
24dB per Octave
Frequency Response
20 Hz to 20 KHz.
Note: RFI filter -6dB 100KHz
Signal to Noise Ratio
-90dB Unweighted
-93dB A weighted
Distortion
.004% @ 0dB, 1 KHz
Dynamic Range
111dB
Input Connectors
Female XLR; Pin 1 Ground,
Pin 2 + (Hot)
Pin 3 - (Cold)
Output Connectors
Male XLR; Pin 1 Ground,
Pin 2 + (Hot)
Pin 3 - (Cold)
Power Requirements
220/240 - 100/120 V AC 50/60
Hz, 8 watts (8 VA)
Weight
5 lb/2.2 Kg
Dimensions
19"W x 1¾"H x 6"D
482 x 44 x 155 mm
CU912/9222s Specifications
Input Impedance
Balanced 20 Kohms
Unbalanced 10 Kohms
Input Headroom
+21 dB
CMRR
>50dB, 20 Hz - 20 KHz
Output Impedance
150
ohms
Output Level (Max)
+20 dB
Filter Type
Linkwitz-Riley state variable
24dB per Octave
Frequency Response
20 Hz to 20 KHz.
Note: RFI filter -6dB 100KHz
Signal to Noise Ratio
-90dB Unweighted
-93dB A weighted
Distortion
.004% @ 0dB, 1 KHz
Dynamic Range
111dB
Input Connectors
Female XLR; Pin 1 Ground,
Pin 2 + (Hot)
Pin 3 - (Cold)
Output Connectors
Male XLR; Pin 1 Ground,
Pin 2 + (Hot)
Pin 3 - (Cold)
Power Requirements
220/240 - 100/120 V AC 50/60
Hz, 8 watts (8 VA)
Weight
5 lb/2.2 Kg
Dimensions
19"W x 1¾"H x 6"D
482 x 44 x 155 mm
It’s worthwhile noting that early
processors, in keeping with the
accepted standards of the time,
were wired Pin 3 + (Hot), Pin 2
– (Cold), and Pin 1 Audio Ground
However, older units may have
been modified by users to the
current Pin 2 + Hot standard as
listed here
Typical Specifications
