UcD need help for more gain

[opor]

Hello,
I am quite new in class D. I have build my first class D amp base on Ucd. Sound is great. But seem that it give less sound level compare to other class AB . Please look into my schematic .Have I done somthing wrong? How to get more gain from this amp?

BR

 

[opor]

Sorry ,
Here is my schematic.

 

[Pafi]

Gain is approximately (R36/R101+1) * R35/(R32+R35) = (8.2/1+1) * 8.2/(1.8+8.2) = 9.3 * 0.82 = 7.626

Increase R36! (And decrease C18!)

 

[81bas]

Increase R36! (And decrease C18!)

Please, do not forget to do the same with R35 and C17...

Also, I would like simply use the additional opamp at the input with required gain. Hypex does the same, by the way...

 

[opor]

With this formular, I have increased R36 to 22K and reduce R101 to 470 ohm.Also reduce C18 to 220pF .So gain is 39.196 .
How does it effect to the performance of the amp? Is it the noise ? Or any others? What is the good solution between increasing the gain of the amp and increasing the gain of balance receiver?

 

[richie00boy]

Why don't you just turn up the volume dial more? Adding gain just makes more noise.

 

[opor]

This is my new schematic . I have build it .And I found some oscillation that make sound dirty . In this schematic there are balance line reciever and bridge adapter. Either I connect signal to balance section or direct to the amp there is still oscillation.

 

[opor]

Sorry here is my schematic.