Verdant of course the amplifiers you import are magically quiet.
We have sold many major brand of tube amplifiers out there, from Mastersound, Unision Research, ARC,Vac, Conrad Johnson, Manley Labs, Cary audio, and others.
We have sold Class A, Class A/B, push pull, single ended and hybrids.
All tube amplifiers have an inherantly higher noise floor compared to solid state devices, most audiophiles consider this part of the natural limitations of a tube amplifier.
We are not saying your tube amplifiers aren't good, but sheesh man, the first thing you do is hit on this guy to look at one of your amplifiers when the reason for him even moving out of the amplifier he has is silly.
The OP should evaluate all of his components and what he is trying to accomplish. If his Spectral amplifier is a good amplifier perhaps he needs to upgrade his source, or his preamp or his cabling.
Dave and Troy
Audio Doctor NJ