Increasing gain from DSP with TL074 to UCD Class D

[Insomnia]

Hi

Im using manoj limiter for UCD Class D amp

look atachment

my problem is, signal come from DSP ang go into manoj limiter, but DSP have only small signal, not enough to get full output power from UCD amp

I want increase gain and have change Op amp PIN6 / PIN7 from 10K to 15 K and PIN 5 / PIN 6 from 12K to 1K but thats not enough.

I need about 30% more gain , what can I do ?

IF I change resistor PIN6 / PIN7 to 33K, can this help to get excessive gain ?

 

[ChocoHolic]

..your proposal would make it louder, but at the same time completely kill the comon mode rejection of the symmetric input.
Better change both 10k resistors to 15k.

 

[JonSnell Electronic]

Reduce the value of the output of the first stage pin7 33k to say 4k7.

 

[ChocoHolic]

Reduce the value of the output of the first stage pin7 33k to say 4k7.

You are shooting with 700% increase of gain and something like tripple the subjective loudness, when Insomnia asks for 30% increase of gain?
That's brave, but you might be right... 😀 😀 😀