Tone Control Filter

[Lotus 7]

Can't see the whole circuit in the pic. Is there a summing amp to the right of the filter section that combines the input with the filtered signal?

[Reno1]

Hi the left opamp IC2A is for the gain control, while IC2b is for the bass and treble and IC3A is for the midrange which just goes to the output

[JohnRoberts]

Dropping r22 to a lower value should increase HF boost.

JR

[Reno1]

thanks for your response so if I drop R17 will that do the same for the bass?

[JohnRoberts]

Making r17 smaller will increase the amount of bass cut.



JR

[Reno1]

So is there a way I can increase the bass and midrange as well, thanks

[Reno1]

Originally Posted by Reno1

So is there a way I can increase the bass and midrange as well, thanks

[JohnRoberts]

google baxandall tone control on the WWW...

design equations are published...

JR

[Reno1]

Hi I was going to look at that, but this circuit is not a typical baxandall circuit so I dont think it applies thanks

[Reno1]

Originally Posted by JohnRoberts

Making r17 smaller will increase the amount of bass cut.
Ok I have been studying the circuit and I think you are right about dropping r22 to increase the Hf however, I do believe if I drop r17 and r25 I should get increased gain in the bass and mid range. I will try this tomorrow and let you know how it turns out thanks


JR