I have a Fender Ultimate Chorus amp and I have been using the effects loop for about a year now to run a Boss DD-3 Delay and a Boss Phase Shifter pedal. Today I noticed that when I use the delay with my distortion (both my pedal, and through the amp's drive channel) I get a horrible fuzzy interference sort of sound. It has never happened before today. I don't get the fuzz when I connect my pedals in a chain and don't use the loop, but I really prefer the sound I used to get through the loop. I checked my cables and they all seem to be working fine, which leads me to believe it's a problem with the amp itself. Does anyone know how I can fix this myself or will I have to send my amp away? Any ideas how much this sort of thing might cost?
Any help would be greatly appreciated, and I thank you all in advance.