Hello. I picked up a Spider Valve 212 combo recently in xlnt condition. The only thing it is missing is the top half of the back panel. As it was designed to be 90% closed back, I'm not getting the intended sound out of it.
Is anyone with one of these amps willing to trace the upper back panel on a large piece of paper that I can use as a template to fabricate one? I'm happy to pay you for the material.
Thanks!