Audible Illusions Modulus 3A noise

It is used 

6922's can be very noisy.  I have had good luck with a lot of the older tubes.  I don't use the term NOS because they are almost non existant.  what most sell as NOS is just a used tube that tests well.  which is really all you need.

I haven't had much luck with the new production inexpensive tubes. 

I don't know that pre, and in that price range is is likely mass produced PCB based, but assuming it doen't have design or build problems, tubes can be found that are dead quiet. 

Good luck,

Jerry

I have owned 3 AI tube preamps since 1994.   I had the original Modulus 3, the 3A, and the 3B. None of them gave me tube noise or hiss.  The key is to get your tubes directly from AI,  or find matched sets of 6H23NEB tubes for the preamp, they are very rugged and quiet   You may find them at the Tube Store or from Upscale   Your noise will disappear like magic, poof  

@carlsbad2 , the preamps are not mass produced as the company is extremely small.  The wait time is usually 6 months or more.  I believe Art Ferris is either retired or semi retired.  

Kevin,

Since your preamplifier is used you really don't know how many hours are on the tube set. AI preamplifiers are notoriously hard on tubes and sensitive to tubes that do not have a low noise floor. I would second @stereo5's advice and contact Upscale Audio regarding what replacement tubes would be recommended. For what it's worth, owner of several AI preamplifiers over the years and many tubes purchased from both Upscale Audio and The Tube Store...