It sounds to me like your speakers are the problem. I usually never try and talk someone out of a preamp upgrade because most people don't realize how important it is for good sound. In your case though, you'll just be using it as a band aid fix, and to be honest, it probably wont work. Also, your Classic 60 may not be up to driving your current speakers.
Why not look at a speaker upgrade instead? If you like plainer speakers, a pair of Martin Logan's would probably make you very happy. The panels are not made of metal and there is no tweeter. They are the kind of speaker you can listen to for long periods of time with no fatigue.
Why not look at a speaker upgrade instead? If you like plainer speakers, a pair of Martin Logan's would probably make you very happy. The panels are not made of metal and there is no tweeter. They are the kind of speaker you can listen to for long periods of time with no fatigue.