Tube Amp Doctor

Tube Amp Doctor (TAD) is a renowned German company based in Worms that specializes in manufacturing, testing, selecting, and distributing high-quality vacuum tubes, spare parts, and components for guitar and bass amplifiers. They are well-known for their premium TAD Premium Tubes, REDBASE and BLACKPLATE series, and for producing DIY amplifier kits, speakers, and power attenuators like the TAD Silencer.