This is a 2 tube GI7BT. a pair of tubes would run you about $60. The box is ran on 120volts AC with about 15 amps of draw AC. I drove 20 watts of RMS watts into it and about 120 watts swing pep and saw 600 dead key watts with a swing of 1800 + mw watts on a bird peaking meter. Very clean audio.
 "2 tube GI7B ( not available )")
© For educational purposes only