Picked up a somewhat rare, Earth Super 2000 Bass Head. It played good but went ahead and had a tube guru repair guy go thru it with a fine tooth combo. He ran a bias checked caps and tubes. Installed all new tubes. I paid 150 for the amp and 35o for repairs oh plus a new 3 prong power cord. AnyOne have a history with this amp. Or know much about them. Played it for the first last night. Wow I had forgotten what a warmed up true tube amp can sound like. It seemed to get better the long I played it! Nice.