Tone stack for bas guitar amp

[Gingertube]

For frequencies of guitar and bass check out the Wiz's "Other Stuff"
http://www.valvewizard.co.uk/OtherStuff.html
Cheers,
Ian

[loudthud]

Peavey made a Bass amp in the 70's simply called Bass Combo (IIRC). It had a parametric midrange with Frequency, Bandwidth and Mode (boost or cut) controls. Pretty hard to duplicate with tubes but the SVT comes close. I always really liked it in spite of the solid state tone of the rest of the amp.

[Enzo]

I think the official name was Combo, with bass COMBO on the panel. I don't have the schematic scanned.

https://assets.peavey.com/literature...s/80349150.pdf

[J M Fahey]

Just as a side comment:
1) make a list of 5 and 6 string Bass players you like.
2) check what amplifiers (and other gear) they use.
3) get relevant schematics and study them, it might help.