The Clear-Com HB-704 is a 4-Channel Select Flush-Mount Headset Station (4.5" X 4.5") which Mounts in Console or Standard 2-Gang Electrical Box.
HB-704 is a selectable four intercom channel wall or console-mounted headset station. Microprocessor-controlled logic and switching, with momentary/latching talk button. Visual call signaling.
Optional 4-wire and TW daughter boards.
Headset Microphone Input
Input Type : DynamicInput Impedance: >= 1KMic Limiter Threshold: -2dBu ± 3dBMic Limiter Range: >= 15dB
Program Line Input
Input Impedance: >= 5K
Load Impedance: >= 8Output Impedance: <= 25Output Limiter Threshold: +5dBu ± 3dBMaximum Output Level before Distortion: >= 17dBu
Off Noise: < -74dBuOutput Impedance: >10K
Crosstalk: < -60dBMax level before Clipping: >= 12dBu
Headset Mic - Party-line: 300 - 15KHz ± 3dBParty-line - Headset Out: 300 - 15KHz ± 3dB
Headset Mic - Party-line: <= 0.5%Party-line - Headset Out: <= 0.2%
Headset Mic - Party-line: < -70dBu
Headset Mic - Party-line: 41dB ± 2dBParty-line - Headset Out: >= 34dB
Input Voltage Range: 20-30 VDCInput Current (Idle): <= 50mAInput Current (Max): <=100mA
Internal Adjustments and Connections
Intercom Line: Seven terminal connectorOption Switches: Two DIP switchesOption 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
32 - 122F (0 - 50C)
4.625 in. W x 4.5 in. H x 1.75 in. D(117 mm x 114 mm x 44 mm)
0.46 lbs. (0.21 Kg)