ADA rig here. The early MP-1 preamp with the line switch hole in the top. Fresh pair of NOS 80‘s/90‘s Beijing Chinese Military Square Getter Triple-Mica 12AX7s installed with only minutes of play time for testing. Has original USA battery that should be changed, and has not been modded. Little scratch on the screen...doesn't affect anything. 80s ADA B200S stereo power amp. This was their first offering to power the MP-1 and it sounds great. This is the quintessential 80s rock rig, and an early one too! They don't make 'em like this anymore. Free shipping to US 48 States.