I noticed on the parts list that the bass pot on Channel 3 has the part number for a 250k pot instead of a 1M pot. I'm not well, so I can't take mine apart right now, but could anyone confirm whether the one on your amp is #593148?
I did some EQ matching using the Tone Stack Calculator and then tried it hands-on and it could be true about the 250k pot, because the tones became very close using Modern.
If you have that program, or choose to download it, take a look at how the EQ changes with difference in value. Scooping out the mids is less dramatic than a person might think. It carves out the frequencies where muddiness occurs and turning up the bass makes the carve bigger in the low mids.
The 2 Channel amps used exact pots for bass on both channels. That makes me wonder if it has anything to do with perceived differences on the Red Channel between those amps and the 3 Channel?
I did some EQ matching using the Tone Stack Calculator and then tried it hands-on and it could be true about the 250k pot, because the tones became very close using Modern.
If you have that program, or choose to download it, take a look at how the EQ changes with difference in value. Scooping out the mids is less dramatic than a person might think. It carves out the frequencies where muddiness occurs and turning up the bass makes the carve bigger in the low mids.
The 2 Channel amps used exact pots for bass on both channels. That makes me wonder if it has anything to do with perceived differences on the Red Channel between those amps and the 3 Channel?
