Quote from: Roly on July 05, 2013, 07:14:38 AM
Considering that typical guitar speakers cut off at around 5kHz both of these figures are a bit on the high side, so I'd be inclined to make the cap in parallel with R9 about three times larger, say 270pF or 330pF, and the one in parallel with R7 some six times higher, say 560pF or 680pF.
I'm not using a *real* guitar speaker, I'm using a generic 8 ohms, 8" Philips full-range that has been re-coned to be somewhat like a guitar speaker. It has a pretty deep cone, and sounds decent enough for me. Not sure if that could influence anything on the choice of these capacitors...
Quote from: Roly on July 05, 2013, 07:14:38 AM
I would also add something like a 0.1uF right across the power supply pins 4 and 8 of the TL082.
I just did that on the layout I made. Doesn't look like anything professional, but I think it's functional. I'll add it as an attachment.
Please don't mind it not looking very nice, it's just that I haven't done a large layout like this in a long time.
By the way, the jumper between pin 7 of the TL082 and the 22nF is in case I wanna add an FX loop, which I can do in an external board.