USED ON ADVANTGARDE SPEAKERS SOUNDS VERY SWEETS, OPEN AND DETAILS. COMES WITH ORIGINAL BOXES,MANUAL AND REMOTE.
The modifications are done in house by Cary and sold exclusively through Upscale Audio. The amp about 4 years old.
It's a wonderful sounding unit. Pristine, from smoke-free, friendly environment.
It's slightly faster than the stock Cary 300 SEI with a little more refinement all around, along with a speeding up and firming up of the bass. Astonishing, endless detail with a well-matched accurate SET friendly speaker, like Coincident Speaker Technology's Triumph Signature.
Here is Cary's website description of the F1 differences:
"Jensen oil and copper capacitors: Gives you the midrange we crave by giving you a more pleasing midband, while increasing clarity & texture.
Hexfreds in the power supply: Results in better pitch and definition especially when music becomes complex, and is most helpful in the bass arena.
CD input wired with Kimber Kable: We could actually do all of them, but it could get quite expensive. So we did one input and you put your most critical component there.
WBT Speaker terminals: Other folks will always refer to "WBT Style" terminals. These are the real ones which cost many times more...but it's where your speakers get the music."