Yamaha T100C. A Soldano designed 100W all tube amp. Mint condition and…. Original Yamaha branded 6L6’s. Some say after Soldano designed the amp Yamaha cheaped out and although still a good amp the T100 and T50 are missing the real SLO sound. So now there are some mods on the internet to let your T100 or T50 sound more like a real Soldano.