The CM-BHA is a portable, battery powered headphone amplifier for use in live applications such as in-the-field news reports. The unit can apply gain of up to +20dB to the incoming signal. The volume control simultaneously modifies the output volume and the input gain, allowing input signals in excess of +24dBu to be reproduced without distortion. The CM-BHA has an adjustable limiter to protect the listener from excessive levels indicated by a blue LED. The limiter is only enabled when an earpiece or headphones are used, and when it is activated by the toggle switch. It is disabled when no jack is inserted, allowing a higher volume to be passed to the speaker for “squawk mode” use.
Product Features
Wide signal range capability.
Transformer balanced inputs & outputs.
Adjustable limiter protects the listener.
Low battery warning indicator.
200 hours from a single 9V PP3 battery.
Typical Applications
Used in TV studio floors, sports grounds and arenas by presenters and cameramen to hear talkback.
Product Category
Belt Packs
Technical Specifications
Technical Specification
Input Impedance: 200kΩ electronically balanced
Input Limiter Threshold: Adjustable -14dBu to 0dBu
Maximum Input Level: +28dBu
Input Gain/Volume: Adjustable -70dB to +20dB
Frequency Response: 20Hz – 20kHz ±0.5 (ref 0dBu 1kHz)
