When a amp is not harsh and bright, tonally balanced and your sound is smooth with treble and bass. Some amps can have a strong bass oitput and become very punchy. For me the some Yamaha amps are very musical, while others can be bright. My Luxman 590 is very detailed and the music is refined to hearing the clean crisp sound. Its a matter of taste and preference, i have Yamaha, Luxman, NAD and Emotiva EQ. You tell me.