Clear-Com HB-702
Intercom Headset Station, 2 Channel

OUR PART #  HB-702

The Clear-Com HB-702 is a two-channel-selectable, full-duplex headset station, able to be mounted into a wall or other surface. These head-set stations are ideal for installation in theatrical, performance, broadcast, and industrial facilities - wherever a multi-channel, full-duplex headset communications panel is desired.

The unit is mounts in a standard U.S. two-gang outlet box. The stations offer 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 off 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 allows 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.

The station may be used with the optional TW (two channels on a single mic cable) daughter board. With the TW board, the stations become plug-in compatible with a Clear-Com TW system. The HB-702 may be used with the optional 4-wire board, which creates separate send and receive circuits so that the station may be attached to fiber-optic lines or other audio routing systems with 4-wire connections. The HB-702 is housed in a durable package with a steel front panel.

Clear-Com HB-702 Features:

  • Selectable two-channel full-duplex communication
  • Microprocessor controlled logic and switching
  • Momentary/latching talk switch with LED
  • Visual call signaling with bright LED indicator
  • Headset connector with volume control and sidetone adjust
  • Use with optional TW or 4-wire circuit boards
  • Easy installation and connection

Clear-Com HB-702 Specifications:

  • Headset Microphone Input
    • Input Type : Dynamic
    • Input Impedance: >=1K ohm
    • Mic Limiter Threshold: -2dBu ± 3dB
    • Mic Limiter Range: >= 15dB
  • Program Line Input
    • Input Impedance: >= 5K ohms < /UL>
  • Headset Output
    • Load Impedance: >= 8 ohms
    • Output Impedance: <=25 ohms
    • Output Limiter Threshold: +5dBu ± 3dB
    • Maximum Output Level before Distortion: >= 17dBu < /UL>
    • Party Line Output
      • Off Noise: < -74dBu
      • Output Impedance: >10K ohms
    • Party Line Input :
      • Crosstalk: < -60dB
      • Max level before Clipping: >=12dBu < /UL>
  • 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% < /UL
  • Noise:
    • Headset Mic - Party Line: < -70dBu
  • Max Gain
    • Headset Mic - Party Line: 41dB ± 2dB
    • Party Line - Headset Out: >= 34dB < /UL>
  • 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) Talkbutton
      • (1) Call button
      • (1) Channel select switch
      • (1) Volume control
  • Environmental: 32° - 122°F
  • Dimensions (WxHxD): 4.625" x 4.5" x 1.75"
  • Weight: 0.46 lbs

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