I'm going to be buying a pair of HD650s.
At the moment my setup is:
Sound Blaster ZX -> PioneerA109 -> Wharfedale Diamond 9.1 + Sennheiser HD555
The pioneer is a pretty cheap amp, which isn't really up to much, so since I'm going to buying the HD650s, I'd probably want to upgrade the amp too, which would also benefit the hifi speakers.
Is it actually possible to get a good pairing between a stereo amp and the HD650s? Or do they only pair well with specific headphone amps? I've read some people mentioning the headphone output needs a low impedance, as the HD650s suffer when its high; although I'm not sure I understood correctly. What is everyone's opinion on running the HD650s from a stereo amp and if so, are there any suggestions?