VT-51, VT-25 & 300B-XLS
Amplifiers built around rare thoriated and large-plate triodes, each one a single commission.
These builds start with a tube the owner loves. The VT-51 amplifier uses 418A drivers, a 412A for the driver supply and 866Jr mercury-vapour rectifiers for the output stage, with front-panel meters to watch each tube's current. The 300B-XLS version switches to 50 tubes with one toggle and went to a client in Quebec. If you have a rare tube in a drawer, ask us what it could become.
- Output tube
- VT-51 / 841, VT-25-A / 10, EML 300B-XLS, 50/VT-52
- Rectifier
- 866Jr mercury-vapour, 83, or 2K12 NOS
- Metering
- Plate current meters for driver and output
- Transformers
- Tamura, ISO/Tango or Muse Coils
- Power
- From ≈ 2 W (VT-25) to ≈ 20 W (300B-XLS)
Final price depends on tube availability.
From your room to your rack
01Your room
We start with your speakers, your room and the music you play, then draw the circuit around them.
02Chassis and wood
Panels are cut, drilled and engraved here, and the frame is made from Thai hardwood.
03Hand-wiring
Every joint is wired and soldered by hand, point to point. You get photos as it comes together.
04Burn-in and listening
Each build runs for days on the bench and is measured and listened to before it ships.
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