Robb, I think that is why they don't recommend Yamaha, as they can't guarrantee some one won't buy a lower end one and be mad that they could only get 100db or less(?)and it shut down. Are the higher end ones better, I don't know but I think if it is in the RXV line they all have the same power supplies.

Meanwhile even the low end Denons drive the M80s with out trouble. I have had my 1804 upto 105db for a few hours with out problems and ran 1.3ohms for an hour or so. I haven't pushed the 3808 yet.

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