I thought this was interesting because I was always under the impression Jerry ran played with little to no bass on his amp and cranked his treble all the way up. But according to Steve Parish Jerry ran his bass on his amp between 7-8 if you listen to this clip around 51:00 minutes in he speaks about it.
https://archive.org/details/BigSteveHour442019
https://archive.org/details/BigSteveHour442019