UP for auction is a classic MESA/BOOGIE STRATEGY 400 STEREO TUBE POWER TWO CHANEL AMPLIFIER in excellent working and cosmetic condition,I bought this amplifier in 89 and it has never been used in a  commercial setting strictly for home purposes.This unit has no issue whatsoever or HUMMING that usually associated with some tube amplifier, when it comes to sound quality the mesa/ strategy 400 stereo power amplifier is on that level,4 STR-12AX7 and 12, 5881-6L6 (425) tubes these mesa  tubes replace the original mesa tubes (6L6-420) years back.Two 1/4"input and 12 1/4"output, Two 2ohms speaker output. Two 4ohms speaker output and two 8ohms output per side,this amplifier is believe to be putting out 200 watts per chanel depends on the speakers set-up, mate this amplifier with a compatible pre-amp for a true experience in tube sound,tubes will ship separately with the unit,Thanks for looking.