After reading about the 650's here, I decided to go listen to a set.
You would think in a major market like Dallas/Ft. Worth that would be easy to find a dealer. Not the case. The only place that has any of the better Senn's was in south Ft. Worth.
They were worth the trip. They had them hooked up to a McIntosh
C45 preamp and a Rotel 1072 cdp. The sound was wonderfull!
The highs and lows were greatly improved over the hd590's.
Smoother,clearer, and best of all not brutal to wear like the Grado
stuff. This will be my next set of cans.