Powers on, some of the tubes light up, but I do not know how to test it any further than that. I messed around with the knobs and switches and was not able to get any more sound out of it than a humming. Some of the tubes were getting pretty hot. Cabinet has some discoloration, small scratches, and dirt/residue, but all around VERY good shape considering its age. Some of the This item is being sold UNTESTED as is. Let me know if you have any questions