I have a les paul studio that's getting terrible tone through the bridge pickup. it is paired with a Marshall AVT 275 valvestate amp. The best way i can describe it is sounding more like the neck pickups, but very muddy. it's not a "hot" tone like most les pauls get through a Marshall. I've always thought it was the amp, but the amp sounds good with my buddy's guitar. Also, there is a definite volume drop in the bridge pup vs. neck pup (weaker signal). Years ago i developed a crackling noise in the volume pot that controls the bridge pickup, and I had a local guitar shop replace it. I honestly don't remember it sounding bad at the time, but I was less of a tone head and had only been playing for about 2 years. I measured the resistance of the guitar's output jack through a 3 inch cable and im getting around 9.18K for the bridge pup and 7.83k for the neck pup. From the research I have done, I probably have a 498t/490R combination for the pups where the neck pickup resistance should be between 7k-9k and the bridge pickup should be between 12k-14k. If this is the case, it would take a very low impedance volume pot (around 25k-30k) to bring the bridge pup's output resistance down to 9.18k. Is it possible that the tech that worked on my guitar grabbed a 25k when he meant to grab a 250k or 500k? or am i crazy? or is my bridge pup dead? I think my math is good because I did the same calculations on the neck pups and it checks out(roughly 8k pup resistance with a 500k pot) and I'm an electrical engineer I just dont have much experience working on electric guitars, but i have faith that some of you do Please help guys!