Design for balanced tone control

[fernfrost]

Im looking for a good design for a tone control with balanced input and output.

Suggestions or advice?

 

[DF96]

Find an unbalanced design. Add bal-unbal convertors before and after.

To implement a balanced stereo tone control you would almost certainly need quad pots. These are not widely available. I suppose you could use switches instead.

 

[AndrewT]

You copy the Putzeys' balanced volume control.

Just replace the vol part with the tone control part.

 

[alexcp]

Douglas Self published several designs. See Linear Audio vol. 5 (http://linearaudio.net/article-deta...tormagazine.com/magazine/elektor-201204/19844) for another.