BHI ATT2 Attenuator Pad
SKU Part Number: BHI-ATT2
Makes it easier to control the audio input on your bhi ParaPro EQ20 audio DSP unit The bhi ATT2 attenuator pad is used to convert the high...
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£24.95 £20.79
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Makes it easier to control the audio input on your bhi ParaPro EQ20 audio DSP unit

The bhi ATT2 attenuator pad is used to convert the high level audio signals you typically get from amateur radio transceivers and receivers to low level, making the audio equipment easier to use.  The ATT2 was mainly designed for use with the bhi ParaPro EQ20 range of parametric audio DSP units, but can also be used with other audio equipment provided the parameters of the equipment are within the specification of the ATT2.  The ATT2 is a passive device and effectively enables a wider range of AF/volume adjustment to be used before the overload LED on the bhi ParPro EQ20 unit comes on, making it less sensitive and easier to use.  The ATT2 accepts mono or stereo speaker level signals up to 1 Watt (2.828 Volts p-p into an 8 Ohm Speaker) and will attenuate the audio down to line level at around 1 Volt (line level at 10k). 

 Pad pic sml Pad pic larger

Pictures above show the extra adjustment you get from the volume/AF control of your radio when using the ATT2 with your ParaProEQ20 DSP audio unit, making it easier to use.


The ATT2 unit simply fits between the extension speaker socket of your radio (high level audio source) and your bhi ParaPro EQ20/EQ20-DSP unit or audio equipment.

Note: Use the audio isolated LLC1 if you encounter any stray RF or earth loop issues.


  • Converts high level audio signals to low level audio
  • Accepts mono or stereo speaker level signals
  • Input Impedance: 11 Ohms
  • Output Impedance: 10 k Ohm
  • Maximum Input Power: 2 Watts
  • Output level: Line level 1 Volt P-P into 10 k Ohm
  • Use with your bhi ParaPro EQ20 DSP unit


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If you have any equipment that needs to be returned to Martin Lynch & Sons, please fill out the form below:

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Upon receipt of goods you have 14 days to return goods however the goods must be returned in original packaging and care must have been taken with the goods you wish to return. Under distance selling regulations you are not entitled to any refund on carriage charges or modification charges made at your request.

Warranty Terms and Conditions

Outside of the 14 faulty return period, returned items cannot be accepted, unless covered by manufacturer's warranty. We will repair as much as possible on site however in exceptional circumstances products may have to be returned to the manufacturer of distributor.

For repairs/replacements under manufacturer’s warranty for any item please download a ML&S return form from the link above and return to ML&S with the faulty product.

International Warranty information

Warranty service for items we sell is available in the U.K. only, unless otherwise noted. It is your responsibility to pay freight for returned items to the U.K. and back to you for desired warranty coverage. All of our NEW products come with a minimum 12 month warranty, (Yaesu & Icom 24 months), with up to 90 days on second-hand equipment. Items returned for service must state "returned goods for repair" on the return air waybill or U.K. import customs duties apply and will be added to your invoice. For more info about returning items please contact our customer help desk, [email protected]