The Sophia Electric 91‑03 300B is a stereo amplifier in a pure single-ended configuration on the 300B triode — the essence of valve, tangible sound in a single, elegant chassis. It offers the magical 300B midrange, fluidity and natural timbre.
The design is based on Sophia Electric’s proprietary transformers and carefully selected components, with a short, simple signal path and no global negative feedback. Its single-ended output of around 9 W works best with efficient loudspeakers.
It is aimed at listeners who want the classic 300B sound in a convenient stereo format — with no compromise in quality.
| Type | stereo valve amplifier, single-ended |
| Output valve | 300B |
| Output power | approx. 9 W per channel (300B SE) |
| Configuration | single-ended, no negative feedback |
| Transformers | proprietary Sophia Electric |
Full technical specifications available on request.
Single-ended stereo valve amplifier on the 300B triode — the magical midrange and naturalness of 300B in a convenient stereo format. Proprietary Sophia Electric transformers.
