Bass/ Treble curcuit. More gain?

[Max Martin]

Wonder if it possible to change som values to make som more gain in this curcuit.
As it is now it’s +/-5db @ 50Hz and 10kHz. I would like it to be more gain (+8db?), especially in the bass and perhaps move the frequency up to 65-80hz.
And yes i know most lf the time flat or tone defeat is preferred but this is for my workroom and i just want some more punch/bass when i’m listening rock n pop (not any real hifi setup here)

It’s a NAD C162 preamp and i think many Nad share same topology so may it can help someone else too.


Best regards
Johan

 

[rayma]

This is a passive tone circuit, normally losing 6dB of level (half). To increase the
amount of boost available, the loss at flat settings would have to be increased.
But the amount of cut available would also have to be reduced.

 

[as_audio]

Question was about "more gain" in the bass, meaning increased control range ..

 

[rayma]

Here's a circuit that has both much more loss and boost range.
You may be able to change your board to this version.
It uses the same value of pots, but needs a larger input capacitor.
A quality tone control circuit using opamp and few passive components

 

[Max Martin]

Ok but isn’t there any easy way to just modify this. Not easy to ad opamps into this curcuit.

 

[ejp]

There is no gain. Only loss. You can't get gain out of a passive circuit. You need active elements for gain. The 36K resistor appears to be in the wrong place, but if you want gain you should throw this out and use a Baxandall circuit with an active gain element at the output side.

 

[Max Martin]

Ok, can i instead have more loss in the mid region?

 

[Mark Tillotson]

Yes I think it could be adapted, but I think it will help if the input and output are distinquished - I think its just a question of tweaking some of the fixed resistors, maybe caps as well.