Good day folks,

I'm in the process of designing (if my random thoughts can be said to "design" anything) a TDA2003 based guitar amp. I have a couple of Ruby amps I've built, and now want something with a bit more power, and the TDA2003 seems to be a good choice from the reading and research I've done.

What I'd like to do this time around is add a tone stack to the amplifier. Can I just put the tone stack right after the input or do I need a "Fetzer valve" type setup before the tone stack? I would think that I do, as the tone stack will take out some of the tone from the input, correct?

Thanks all . . . your advice and insights are much appreciated.