Yep Yep,, I understand that (as best I can) but I don't get too concerned about that kind of detail,, you just tweak the tone circuit to suit the situation.
Heck it's only guitar preamp
As long long as the signal out is bigger than input then it works,, the rest I leave for experts to nut out.
FWIW, Here is how I would approach this design problem.
Tweak that voltage division, I think 4k7 is too low to be useful. (might leave that for the serious teck guys to teckxplain)
Next is compensate in the tone tree.
Using the classic fender style it's mostly adjustment of the slope resistor.
(R6 in my circuit)
Obviously an increase of C1 or larger R20 will change that bass response considerably.
I'd likely put a buffer after the output just to be sure it can run into almost anything.
And for the benefit of *GuyB* I've found these discrete FET circuits to be noise prone. and tricky to setup so if you are starting out I'd stick with opamp circuits until you become proficient at understanding design and especially the hidden flaws that lurk.
Phil.
