I can only refer to my experience auditioning the int 60. I’ve not heard the Accuphase E650. I would agree 100% with your evaluation of the int 60. Outstanding amp. Beautiful sounding in every respect. I wasn’t going to audition it at all but thought I’d wonder "what if" if I didn’t at least listen to it for a few minutes. I’m so glad I did.
It sounded superb on it’s own but then we plugged it into an MSB ADC V streamer/DAC....Oh my!! Incredible richness and really well balanced frequency spectrum. Nice tight bass, rich, open, and smooth mids, very nicely rolled top end, with great sound staging and dynamics...what’s not to like? And that was all before connecting it to the MSB. I was, needless to say, very surprised by the int 60. Having said all that I’ve read nothing but positive comments regarding the entire Accuphase line.
It sounded superb on it’s own but then we plugged it into an MSB ADC V streamer/DAC....Oh my!! Incredible richness and really well balanced frequency spectrum. Nice tight bass, rich, open, and smooth mids, very nicely rolled top end, with great sound staging and dynamics...what’s not to like? And that was all before connecting it to the MSB. I was, needless to say, very surprised by the int 60. Having said all that I’ve read nothing but positive comments regarding the entire Accuphase line.