Hi Shawn,

If the Yamaha RX-V1400 has a switch on the rear panel for 4-ohm loads, it will likely impose a current-limiting circuit, so I'd suggest you either think about getting M60s (8 ohms), which any receiver will easily drive, or choose an H/K or Denon that will drive the M80s.

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)