I just recently bought a second hand stiletto ace 2 x 12 combo . Something wierd is happening on channel 2 and mostly happens in tite gain or fluid drive . Say I let the amp feed back from the low e and then hit a couple of notes I get a wierd kind of muffled effect sound with no definition to the string that I struck . The only thing I can compare it to is the sound of a ring modulator effect . It is a horrible sound. The tubes are pretty clangy and I am hoping this is the problem .Any insight into this would be great .