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

Description

A surface mounted four-channel-selectable, full-duplex headset station, the Clear-Com HB-704 is designed for applications where speech intelligibility is a priority even in noisy environments. Equipped with momentary and latching LED talk switch, call tracking LED, Volume control and sidetone adjust that sets the level of the users voice in the headset, the HB-704 is versatile enough to fit comfortably into a wide variety of communication situations.
Applications
Theatre / performance venues
Broadcast facilities
Industrial facilities
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
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
Headset Output
Load Impedance: >= 8 ohms
Output Impedance: < =25 ohms
Output Limiter Threshold: +5dBu ± 3dB
Maximum Output Level before Distortion: >= 17dBu
Party Line Output
Off Noise: < -74dBu
Output Impedance: >10K ohms
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 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