Valco Airline amp similar to model# GiM 9151a & 62-9025. 60’s. 4X6L6’s. Loud! with super tight bass on clean channel. 2 channels. Modded with a tap switch on the output transformer to allow for use with single cab-Originally these had to be hooked up to 2 cabs at once. Also added: Channel 2 gain and a mas...