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I just purchased a silverface Bassman 50 watt amp. I'm looking for any info or resources on the Bassman line and tube amps in general. I'd like info on schematics, tubes (how they work, classification, etc.), & what speakers to use. Its got a 2x12 closed cab with one original(?) speak and a replacement. It sounds great but I think it could be better. Any info would be great!