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Chip Amps Amplifiers based on integrated circuits

Modify Parapix Bass Boost Gain
Modify Parapix Bass Boost Gain
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Old 19th March 2013, 09:34 PM   #1
undefinedza is offline undefinedza  Europe
diyAudio Member
Join Date: Sep 2011
Default Modify Parapix Bass Boost Gain

Hi everyone,

I'm planning on building a set of sealed subwoofers using Peerless SLS 10" drivers and a pair of Parapix Subwoofer Amplifiers.

The Parapix amps use two LM3886 chips, which can be bridged to get 120w into 8 ohms. They also come with a bass boost, which entails a 12dB boost at 33.5Hz. More info on the amplifier here: ParaPix Subwoofer Amp Info

The amplifier schematic is here: http://i.imgur.com/v2Wbh94.gif

I'd like to modify the gain of the bass boost function to around 6dB (half). This is a much better number and models really well in WinISD with the SLS driver.

Any ideas on which components to change to yield a lower gain?

Thanks in advance.

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