Not really, a number of us run the Denon 3808 and I ran my M80s for a while with a Denon 1804, So you don't have to buy a heftier amp, just one that is well built. I would be very surprised if the newer Yamahas you are looking at couldn't run the M80s.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70