I’ve done a ton of reading, but can find any good pictures online of the resistor to remove to set the presence at 0. From what I’ve read, there’s a fixed resistor instead of a presence pot on these amps. This amp is really bright! I would like to remove the resistor to try and take out the brightness. Can anyone point out the resistor to snip to get rid of the fixed presence. I think this is a January 1983 amp. Thanks.