What is the quietest preamp you've used?


Can you also please tell me whether you were using balanced or se ins/outs? Thanks.
matti
Audio Research LS 10 solid state preamp using balanced interconnects...it was run through a BPT line conditioner.

Dead quiet...eerily quiet. The sounds came out nowhere in a pitch black background.
In terms of tubed preamps the quietest I've yet used, and to a large degree, is my current Herron VTSP1A/166. It is fantasticly quiet as well as great sounding. If you are up to considering tubes, I highly recommend it. It's completely single ended, as is the rest of my system.