The Sophia Electric 91‑05 300B is the flagship stereo amplifier in a Dual-Mono configuration built around the legendary 300B triode — with the finest components, chassis and transformers in the brand’s range. This is uncompromising single-ended sound: tangible, fluid and full of colour, with the magical 300B midrange.
The design is built on a high-grade aluminium chassis and Sophia Electric’s proprietary transformers (3K/3.5K primary winding, 0‑4‑8 Ω taps). The proprietary driver circuit is potted in resin within a metal module — for maximum stability and signal purity.
This is an amplifier for the most demanding audiophiles who seek the peak of fidelity and emotion in the 300B triode — in Sophia Electric’s top-tier execution.
| Type | stereo valve amplifier, Dual-Mono |
| Output valve | 300B (single-ended) |
| Output power | approx. 9 W per channel (typical for 300B SE) |
| Transformers | proprietary Sophia Electric (3K / 3.5K primary; 0‑4‑8 Ω taps) |
| Chassis | high-grade aluminium |
Full technical specifications available on request.
Flagship Dual-Mono stereo valve amplifier on the 300B triode — the finest Sophia Electric components and transformers. The peak of fidelity and emotion in 300B sound.
