bhi Compact In-Line noise cancelling

£179.95 Ex VAT £149.96


bhi Compact In-Line mono/stereo DSP noise cancelling module

Compact In-Line

Compact In-Line mono/stereo DSP noise cancelling module



0.270 kg

Product Number



Part of a Bundle


Audio Player


Compact mono/stereo DSP noise cancelling unit ideal for portable use!

The New Compact In-Line module measures just 125 x 70 x 37 mm, and is the latest addition to bhi’s range of DSP noise cancelling products.

This small compact handheld unit is ideal for portable use, and includes the latest bhi DSP noise cancelling technology. It is designed to be used with a pair of stereo headphones, but will also drive a mono loudspeaker or a pair of powered stereo speakers.

The Compact In-Line module is powered by either two AA alkaline or NiMH batteries or from a separate 12V DC power supply (fused DC power lead supplied).  All the functions are microprocessor controlled and the unit can accept speaker level and line level mono or stereo signals. It has separate speaker level and line level inputs with two separate rotary encoder controls with pushbutton action for filter level select, power on/off, volume control and stereo/mono signal selection. You simply adjust the controls to suit your current noisy conditions. This module is suitable for use on all radios and receivers including software defined radios (SDR) including the Elecraft range and FlexRadio products.


  • Compact handheld DSP noise cancelling module
  • New improved stereo/dual channel noise cancelling algorithm
  • Processed speech clearer and more intelligible
  • Easy to use controls for all functions
  • Use with mono, stereo or two separate audio channel inputs
  • Ideal for portable use, DXing, and special event stations
  • Use with headphones or a speakers
  • Over 40 hours battery life with 2 x AA alkaline or AA NiMH batteries


Power Supply:
External supply: 8 to 16V (nominally 30mA, max 350mA peak)
Reverse polarity protected
Internal batteries: Type: AA x 2 (Alkaline or NiMh recommended)
Reverse polarity protected
Low battery indication threshold: 2.1V ±0.1V
Low battery indication: LED colour changes to red.
End-of-life threshold: <1.5V
Life: 40 hours typical (Alkaline or 2500mAH NiMh).
Auto power-off: 60 minutes if input signal < 60mVpk-pk
Auto power-off can be disabled if desired.

Audio Inputs
Speaker level in: Stereo or Mono
Input Impedance: ~7 Ohms
Max withstand input power: 2 Watts RMS per channel
Max input amplitude: 3.9Vpk-pk
Line level in: Stereo of Mono
Impedance: 6.7k Ohms typical
Max input amplitude: 1.6Vpk-pk
Overload indication: LED flashes for at least 3 seconds

Audio Outputs
Phones out: Stereo or Mono
Impedance: > 4 Ohms (Can also be used as Line Level output).
Max power output: 0.2 Watts RMS per channel
Volume levels: 16 levels in 3dB steps.

DSP Noise Filtering
Modes: Enabled / Disabled (0dB suppression)
Levels: 8
Noise suppression: 8 to 40dB

Size & weight
Size 125 x 70 x 37mm
Unit weight 0.125Kg


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