Let me explain this phenomena on a larger scale with speakers. I have Martin Logan ESL’s (electrostats) and I was running them both from an integrated tube amp. The sound was great but I saw that my local audio guy had two emotiva mono blocks on sale for $750 a piece (normally $1100 each) After setting them up properly, which did require removing our sub as the adapter caused one speakers to be quiet) I found that I really didn’t even NEED a subwoofer as they were being sufficiently powered (given a full strong signal.) The highs and clarity and dynamics and even soundstage were improved. These mono blocks must weigh around fifty pounds each and boy let me tell you I do not want to move them again but they supple class A or class A/B power with a switch. Try out better amps, but you might want to get better speakers down the line too!