Wow!
Nearly 10 year old thread. I was reminded I dropped in, back in 2018.
Are you referring to tube rush? Don't expect dead silence at cranked levels, or have your ear pressed against the speaker, you're going to be disappointed.
My Foz is quiet. till around 12:00 o'clock(MC setting) Past that, once the music kicks in, it's forgotten, and not a deal breaker. I don't listen at concert levels, so at moderate
levels, very quiet, especially the MM setting.
I have a V2, allegedly with improvements to make it quieter. The cheesy blue LED under the tubes were replaced with orange LED's also. I disconnected that front blue LED, which I found too 1980's looking!
ALL tube units have some degree of hiss. The Foz has active gain, so it's a little noisier than the current popular units which are aided by transistor and step up circuitry.
From the listening position, it should be acceptably quiet at moderate levels.
If you have a spare 12ax7,at7 and 6DJ8 you could swap to see if it makes any difference. I doubt it's a tube. Sometimes just reseating them can eliminate a pesky noise.
Per the manual, V3 is the money tube(12ax7 or at7) for sonic tweaking.It's subtle and naturally subjective. To my ears, the Foz is more similar than different than the current players. I've had a few current,popular tube units side by side with the Foz. They are definitely quieter at high volume .
If you find it too noisey, a Manley Chinook or Herron is in your future.
