At 59 years old, he finally put together his own stereo tube amplifier and we ... tetrodes which are mostly used by major audio brands for their guitar amplifiers nowadays.

Here comes a new compact power amplifier that isn’t made in China: Pro-Ject Audio Systems’ Amp Box RS2 is made in Europe; it ...

These high-performance amplifiers deliver 700W and 1000W per channel at 4 ohms, respectively and support various output modes including 100V, 70V, 16Ω, 8Ω, and 4Ω.