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In Reply to: RE: phono noise floor posted by Eli Duttman on February 23, 2015 at 21:56:26
great post and a lot has to do w/ two gain stages (phono and line) but your hints and recs are right on. Thanks for helping make AA as good as it is. Perhaps too he has a modern very sensitive high z in power amp that can make noise floors easier to hear. I don't know the gain of that pre, couldn't find it but when my 27db gain CJ was plugged into a modern sensitive power amp it was noisier than I'd like.When I went to a passive linestage I got a 3/12AX7 phono pre w/tube regulation and passive/switchable EQ and used a high output Grado and that was really noise free, the quietest phono rig I ever had.
E
T
Edits: 02/24/15Follow Ups:
I use both modern SET and vintage PP monoblocks, depending on the day. Neither are unusually sensitive in current configuration, and the white noise issue is the same on both. I may try switching out the Denon for a Grado Gold to see if there's a difference, and there are some other suggestions here to try, I appreciate the help.
Dave
Good luck! You'll get it but really noise floor is just something that is a bother when there is nothing playing. You can't hear the hiss while music is playing right? If so something is up. And yes try a high output cart too.
E
T
It's not audible when any real sound is happening in a recording but it is plainly audible in quiet passages or pauses, so it's a drag in subtle music and stuff with wide dynamic range. I'm quite curious to look into heater voltages, should get the chance tomorrow night.
Dave
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