For sale Raven Labs PHA-1 Headphone amp / Pre-amp, Battery or AC powered

This is the rare, legendary Raven Labs PHA-1 all-battery headphone amp / preamp designed and built by Steve Rabe, founder of SWR. It has a remarkably clean, clear tone and can be used as a full-fledged preamp or practice amp with headphones, no power cord required. This unit runs off 2 9v batteries or the factory supplied AC adapter (which seems to be uber rare). It also has a stereo mix capability to practice along with a stereo 1/4" input with mono switch. Works perfectly and offered at the same price as the last one sold here which did not have the 18 volt power supply.