Thanks Glisse. I believe it has more to do with amplifier matching. When I changed amps. from my current SS amp. to tube monoblocks the noise floor was very low - almost inaudible, but it is elevated when I put the SS amp. back in the loop. Regardless the pre-amp. sounds excellent and I am ok with the noise level which is inaudible from my listening position 8' away and is not noticeable unless I get to about 2' distance from the speakers.
Cheers,
Sid
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