comparison of battery powered phono preamps


Does anyone have comparative listening experience with these battery powered phono preamplifiers - and are there others out there worth considering?

Sutherland Ph.D.
NAT signature phono
ASR Collector
F-117 Nighthawk
jfeldman
thanks - will look at that one too - always nave been a big Nagra tape machine fan. My budget is about $3,000.
I remember a preamp from Welbourn Labs that used battery + line power at the same time.
The Veloce Audio phono stage is gets its power from their gorgeous battery-powered linestage. It's really something! Cheers,

Spencer
I have the ASR Basis Exclusive which is battery powered. It is the best one I have had and sounds better on battery power than it does on AC. Has two seperate phono stages so you can use two TTs at once.