Silver cables sound best on tube gear. Theils are a little on the brite side to begin with. You need to add a cable that has no brite characteristics. Cardas cables are very warm sounding that might solve your problem. Harmonic techs. are very neutral sounding. Mit is good but transparent is better but with transparent you have to spend a lot to get high quality. any of those will work much better than what your using now. Good luck
