Fosi V3 Mono Break-In

Just buy them from Amazon.

Years ago I bought a stereo amp from Fosi direct and one channel was out. They wanted my to ship it back on my dime. WTF?

PayPal got me a full refund after over a month of much consternation..

Now I have a "mono."

 

jasonbourne71

1,133 posts

10-11-2024 at 12:12pm 

Remarkable performance for not much money! Look out all you makers of four and five-figure amps!
 

Yep. Pass Labs, Audio Research, McIntosh, Boulder etc have been locked up in their situation rooms conducting emergency meetings discussing how to combat such a giant killer and survive this threat.

These amps are terrific. They've been on for 5 days, have played about 50 hours of music - and I"m convinced they do sound better than when new...I did like them cold out of the box, and I did not listen enough along the way so that I "adjusted" to their sound...

Not sure if they break in much, as I didn’t play my pair too long before swapping out the op amps to the Sparkos (two each in the XLR input).  I did notice an improvement when the op amps were replaced.

Funny, but I mentioned somewhere that the Fosi, with the Sparkos, had better resolution than pretty much any amp I have.  Not by much, mind you, but I noticed some subtle things in my test tracks that I’ve listened to hundreds of times.  And none of the test tracks sounded worse.

I’ve since added a pair of GaN power bricks (48volt/5 amp) and I feel that these made the background more black than with the 48 volt/5 amp power bricks that came with the Fosi.  I didn’t initially hear any difference, but after breaking in the new bricks for a few days, they seemed to sound better.  

Overall, though, the Fosi are quite incredible sounding amps.  They are currently driving a pair of Maggie 1.7i speakers.  

For reference, some of the other amps I have in home;  VTL MB185; Pass Aleph 2; Cary 805B; Marsh A400S; pair of Schiit Aegirs; and a few others.  

The Fosi’s do not make me want to swap in one of the other amps.  I initially got these because most of my other amps generate too much heat in my small listening room during the summer months.  

The Sparkos are your friend.