Clear-Com HB-704 Remote Station
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Clear-Com HB-704 Remote Station


4 channel Wall-Mount Remote Intercom Station

BSW PART: HB-704

Clear-Com HB-704 Remote Station
The HB-704, four-channel-selectable, full-duplex headset station, and HB-702, two-channel-selectable, full-duplex headset station, are designed to be mounted into a wall or other surface. These headset stations are ideal for installation in theatrical, performance, broadcast, and industrial f a c i l i t i es - wherever a multi-channel, full-duplex headset communica t i o n s p a n e l is desired.

Both units mount in a standard U.S. two-gang outlet box. The stations oer excellent speech intelligibility even in high noise environments. Microprocessor-controlled logic plus a set of internal and external controls allow the features of these stations to be tailored to the needs of the user. Electronic switching for the talk button, blue-color LED (on) or amber-color (off), permits momentary or latching operation. A Remote Mic Kill (RMK) signal on the intercom line will turn on the talk function if it is accidentally left on.

A red-color LED tracks the incoming call signal, so it can be used for visual cueing. An associated call button allows the user to place a call signal on the selected intercom line. The standard 4-pin XLR headset jack accommodates Clear-Com and compatible dynamic headsets. A sidetone level control adjusts the amount of the user’s voice heard in the headset. An automatic limiter circuit adjusts and limits the microphone output to the intercom line. A two-position switch on the HB-702, and a four-position switch on the HB-704, allow the user to select from the attached intercom channels. Connections to the intercom lines are made via a screw-terminal block, using standard two-wire shielded mic cable.

Technical Specifications

Headset Microphone Input

Input Type : Dynamic
Input Impedance: >= 1KΩ
Mic Limiter Threshold: -2dBu ± 3dB
Mic Limiter Range: >= 15dB

Program Line Input
Input Impedance: >= 5KΩ

Headset Output
Load Impedance: >= 8Ω
Output Impedance: <= 25Ω
Output Limiter Threshold: +5dBu ± 3dB
Maximum Output Level before Distortion: >= 17dBu

Party-line Output
Off Noise: < -74dBu
Output Impedance: >10KΩ

Party-line Input
Crosstalk: < -60dB
Max level before Clipping: >= 12dBu

Frequency Response
Headset Mic - Party-line: 300 - 15KHz ± 3dB
Party-line - Headset Out: 300 - 15KHz ± 3dB

Max Distortion
Headset Mic - Party-line: <= 0.5%
Party-line - Headset Out: <= 0.2%

Noise
Headset Mic - Party-line: < -70dBu

Max Gain
Headset Mic - Party-line: 41dB ± 2dB
Party-line - Headset Out: >= 34dB

Power
Input Voltage Range: 20-30 VDC
Input Current (Idle): <= 50mA
Input Current (Max): <=100mA

Internal Adjustments and Connections
Intercom Line: Seven terminal connector
Option Switches: Two DIP switches
Option Board Jumper: Two sets of options jumpers

Front Panel Connectors
Headset: (1) XLR-4M

Front Panel Controls & Indicators
(1) Sidetone control
(1) Talk button
(1) Call button
(1) Channel select switch
(1) Volume control

Environmental
32 - 122˚F (0 - 50˚C)

Dimensions
4.625 in. W x 4.5 in. H x 1.75 in. D
(117 mm x 114 mm x 44 mm)

Weight

List Price: $445.00
$400.50
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