I need a 15 inch cab to run as a 2nd cab with my Ampeg Pro4 Head. A Guitar Center about 30 miles away lists a used "Ampeg 1x15". When I called them to ask what model it was, the guy said he did not know. It had no marking on the back. It had a metal grill, with a carpet-like cover, and the Ampeg logo was on the top left. It had no wattage listed. I asked if he thought it was a cab someone built and stuck a logo on and he said he didn't think so. Any ideas on this before I waste an afternoon's drive. Thanks!