I purchased a new HRD3 from Guitar Center today after spending about 2 hours trying 5 different guitars with humbuckers, P-90's and single coils. I loved the sound of all the guitars thru that amp!! I like the dirty channels too even though some people aren't fond of them. I was sold! Traded my 04 Marshall DSL401 towards it. Here's the problem: I take the amp home, put a seat belt on it in the truck too, plug in my 61 RI SG and BAM the worst sound guitar ever! No clarity way too much bass even with the bass on 0. I have WCR pups and pots, Callaham bridge, aluminum tailpiece and Spraque Vitamin Q 0.022 pots. I don't know what to do. I don't have any other guitars to test it with. Is there a mod for the volume? I don't like that I can only go to 2 or else be blown out of the room. And how do I stop the tube rattling? Didn't notice that in GC Thanks for the help!!