IMO clarity/resolution is the solution to better sound at any volume. It starts with your soure and then the preamp. All that gets passed through to your amp which basically just magnifies the signal. Most preamps have to use a little juice to get them sounding good basically becasue of the caps in the signal path. Use a direct heated triode preamp that is transformer coupled and you won't have that issue. If you are using a CD Player how old is the laser? That can have a significant affect on clarity/resolution.
Happy Listening.
Happy Listening.