hello all
i picked up a early 70's sunn sceptre, playing a fender pbass through it, it sounds quite nice, but i am not sure what some of the knobs do and i was wondering if maybe someone here could shed some light on it.
the knobs are the depth, contour, and rate knobs... i'm not sure if they're related to the reverb or not (which i have turned off), but when i turn them up/down, i can't tell a difference in the sound. this could also be because they could not be working...but i just want to know what they should be doing before i jump to conclusions.
thanks much.