Bryston repair failed to bring the unit back to the marvelous sound when new. They fixed the little problem with the mute relay, but what ever was really a problem was missed. (I clearly stated the device was not up to the level when it was new, first few years.) The sound was not as good as it was when I bought it. I cannot really blame them, but it sits in the closet, not in use. Since several other phono preamps I own sound better than the Bryston BP-1.5 I would add I can understand fixing stuff which is just under performing a little, but not broken must be a service Hell, only a genius could solve well.. To me the problem if a slightly under-performing unit is really difficult to solve. A service guy could replace a fortune in parts and still not find the issue. So I have no beef with Bryston. Just a little sad.
I wrote that in another site when asked about problems with etc.
Added: I love my BP-26 and 4B-SST² The BP1.5 sat after i thought it was the Benz Glder had failed. lean sound.. Then I plugged the Glider into a Audio Illusions Modulus 3a .and wow the cart is fine. Then the BP-1.5 mute relay got stuck when I plugged t back in after sitting for a few years. So I sent it in, to be fixed. I guess the shipping knocked the mute free. (dealer also tested it prior to sending)
Mostly I can relate to how hard it must be to fix something not broken, yet fails to please as it once did.
Bryston might have a resident genius to solve these sorts of things. I own so many phono preamps I am not pushing for it to be solved..