Originally Posted by charley phogg
Thanks man, can you recall/explain as much as you can about what,or how it changed your 650's? I'm curious for future reference.
For my experienced, I used hd650 to pair with many amps e.g. Heed, X-Can V3 and PR-II. The sound was difference and seemed good in various characters. However, it just sounded right with Solo in the sense of speed, tonal balance, smooth egde, airy with impactful.
Note: my favorite kinds of music are pop/rock, indie, jazz and R & B. With Grace M902 the sound from hd650 will be more opened with wider soundstage.