Running a preamp on battery power is no big deal, and has been done for years...the circuits draw little power. The idea of using a signal-sensing automatic turn on also is not new...just about every subwoofer plate amplifier has this feature. Putting these two features together in a preamp is a good idea. It's a clever piece of equipment, and must be fun to own.
All that being said, how does it sound? Good enough to justify the price?
All that being said, how does it sound? Good enough to justify the price?