The best 1x12 combo amp! Small (14"x15"x8"; 24 lbs.) and mighty! 100W @ 8-ohms; 150W @ 4-ohms (w/extension speaker). Ser. #1F9949E41120564. Bought new from Guitar Center in 1993, this mean little workhorse still sounds great!! It's got some exterior scuffs and dings but is 100% operational. The power amp was replaced (factory upgrade) in about 1999; the amp sounds bigger and better and has been more reliable since. The speaker is in excellent shape -- no tears in the cone and the foam surround is fully intact. Great sounding amp for upright and electric bass. Plenty of power to drive an extension cab. View specs at: http://www.gallien-krueger.com/PRODUCTS/COMBOS/MB150S112/mb150s112.html Photo of amp available upon request. Sale price includes a top-quality custom carrying case made for me by Glen Cronkite (one of the original designers of Reunion Blues cases). Grey cordura with excellent padding and heavy-duty zipper. Shoulder strap and accessory pocket. $100 value. $450 for the amp and case. I'll deliver to within 90 miles of 94133.