Arguably one of the finest tube amplifiers. A Jonathan Valin favorite. Will be sorely missed, but must downsize the system at this time. Had the newest tube sockets installed at AR at the last retubing about 1200 hrs ago. Same design and sound as the Ref. 600MKIII according to AR. Best value for power and sound. Original shipping boxes. Must go by truck as they are about 220lbs each boxed. Clean face and top, some rear side scratches, but no nicks, dents or gouges, just some paint scrapes at the rear sides.