I agree with Herman. www.reflectionaudio.com
There isn't much chatter about this product on the net although there was one post by a person who directly compared this preamp with some very notable contenders, both tube and solid state. Unfortunately I can't remember the other brands he compared.
I believe customization is available. Unlike some other battery powered products this preamp has balls, very dynamic and quiet. The preamp section never sees AC voltage even when it's charging. It's difficult to tell the difference when listening in the charging mode or in play.
I was lucky to find a loaded Quantum used. Unfortunately, the only comparison I could make was with a late model Audible Illusions M3A w/phono which was completely out classed in every aspect, and my Eidolons don't lie.
Have fun
