ICS-22

Technical Specifications

Headset Microphone Pre-Amp
Input Type: Dynamic
Impedance: 1k ohm
Input Level: -55 dBu nominal; -10 dBu max.

Panel Microphone Pre-Amp (KB-211GM only)
Input Type: Electret
Input Level: -45 dBu nominal

Pre-Amp Response Curve
Frequency Response: 250 Hz to 12 kHz, contoured for intelligibility
Limiter Range: 20 dB

Headphone Amplifier
Load Impedance Range: 50 ohm to 2k ohm
Output Level: at least +20 dBu across 600 ohm
Distortion: < 0.5% THD at 1 kHz
Frequency Response: 200 Hz to 15 kHz, ±3 dB
Power Output: 110 dB SPL

Speaker Amplifier
Speaker Type: 2.5 in. round, 16 ohm
Power Output: 2 W into 16 ohms
Frequency Response: 200 Hz to 15 kHz, ±3 dB
Signal-to-Noise: 75 dB
Distortion: < 0.5% THD at 1 kHz
Speaker Level: 98 dB SPL at 3 ft.

Program Amplifier (Transformerless, balanced differential input)
Input Level: -20 dBu
Input Impedance: > 100k ohm
Frequency Response: 150 Hz to 15 kHz, ± 3 dB

Power Requirements
Voltage: 30-VDC standard unit; 16- to 18-VAC with 4-Wire Option Module
Current: 100 mA average

Internal Connectors
Program: Three-position, plug-on screw terminals
AC Power: Two-position, plug-on screw terminals

Front Panel Connectors
Panel Mic: (1) 1/4-in. panel mounting jack
Headset: (1) XLR-4M

Front Panel Controls & Indicators
Panel/headset-mic switch: (1)
Program-level control: (1)
Intercom-volume control: (1)
Sidetone control: (1)
Talk button: (1)
Answer-back button: (1)
VOX control: (1)
Talk/listen selector: (1)
Speaker on-off switch: (1)
Talk light: (1)
Call-waiting light: (1)

Environmental
32° to 122° F (0° to 50° C)

Dimensions
8.25 in. W x 4.5 in. H x 1.75 in. D (210 mm x 114 mm x 44 mm)

Weight
ICS-22 1.34 lb. (0.61 kg)

Product Spares List

Product Spare Part	Spare Part Description
740084	Replacement  120V Power Supply (400008) See ICS-22
240099	Round Yellow Lens (Call/Call waiting)
740072	Replacement Slim Speaker Assy
240057	Replacement  Trim pot Shafts (used for program level, sidetone, Null Adj)
240077	Replacement Level Knob (Volume, Program listen level)
240081	Replacement Round Call/Announce Button
240082	Replacement Rectangular Talk/Call Button
240069	Replacement  Vox Trim pot Shaft Black