Clear-Com HB-704
Intercom Headset Station, 4 Channel

OUR PART #  HB-704


Clear-Com's HB-704 is a four-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 four-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-704 is housed in a durable package with a steel front panel.

Clear-Com HB-704 Features:

  • Selectable four-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 sidetoneadjust
  • Use with optional TW or 4-wire circuit boards
  • Easy installation and connection

Clear-Com HB-704 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 terminalconnector
              • 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 (W x H x D): 4.625" x 4.5" x 1.75"
            • Weight: 0.46 lbs
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Clear-Com HB-704
Intercom Headset Station, 4 Channel

OUR PART #  HB-704

Product Information:

Clear-Com's HB-704 is a four-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 four-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-704 is housed in a durable package with a steel front panel.

Clear-Com HB-704 Features:

  • Selectable four-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 sidetoneadjust
  • Use with optional TW or 4-wire circuit boards
  • Easy installation and connection

Clear-Com HB-704 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 terminalconnector
              • 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 (W x H x D): 4.625" x 4.5" x 1.75"
            • Weight: 0.46 lbs
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The 704 series is Clear-Com's most advanced party-line intercom system. Each station is a four-channel intercom with superior audio and versatile channel access to provide unmatched communication flexibility. All front-panel controls are ...
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The CC-26K is a single open ear, lightweight headset with an over-the-head design. The flexible neck boom and dynamic noise cancelling microphone help improve voice clarity. 4-pin female XLR Connector Single Ear Headset Open Ear Phone ...
Telephone-Style Intercom Handset
Clear-Com HS6 Telephone-Style Intercom Handset
The Clear-Com HS6 Push-to-talk switch in handle minimizes bleed of external sound into the intercom system when handset is not in use. Connects to intercom with 4-pin connector on a 6-foot coiled cord. Wall/console mounting cradle is ...

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