First made in 1959, this is the best-selling tube amplifier of all ... way of rating amplifiers’ power levels. But the ST-70 has remained popular among vintage hi-fi enthusiasts.

If you ever wanted to build your own tube amplifier but you were intimidated by working with high voltages ... the pre-amplified signal and acts as a power amplifier. [Marcel]’s amplifier ...

Much like vinyl records, tube amplifiers are ... designed in Germany for high-frequency applications but can be made to work for audio amplification in a pinch. The power amplifier section also ...

Self-taught boutique builder Charles Henry puts musicality first with his designs, winning fans including Grace Bowers and ...