The first real big boy amp I bought when I got into this hobby was my Yamaha M-4 and I cannot find a fault with this unit. It is the most musical and pleasing amp in my (sizeable) collection, and it is absolutely transparent while I am listening to Gus Dapperton’s album “Orca.” I rotate this amp in and out of my different systems and it is currently powering my bedroom system with some AR90’s and being ran by an adcom GTP-450 and I really just wanted to post about how content I feel right now; its been rough recently, but these sound waves really do make things better. I hope the rest of us on this forum can relate, it’s really the best I have felt in months and I wanted to share it with everyone else. Cheers.