This is a 300B single-ended stereo power amplifier crafted by Sopiatecno, a name known mainly to serious audiophiles. Sopiatecno operated as the tube amplifier division of an import trading company once based in Kobe, Japan, building hand-made valve amplifiers.
The brand specialized in two design lineages: German vintage-inspired designs and Western Electric-inspired designs. A defining feature shared across its amplifiers was the use of in-house designed and manufactured original transformers. Remarkably, these transformers were built using Western Electric cores and Western Electric black enamel wire, then rewound and refined in-house, making them a truly ambitious original creation.
In the world of Japanese boutique tube amplifier makers, Sopiatecno stands alongside respected names such as Shindo Laboratory, Eltus, and Kanno, placing it firmly in the top high-end class.
This particular unit is a prototype. Despite its prototype nature, the quality reflects true professional craftsmanship, with careful chassis machining, neat layout, and tidy wiring throughout. The output tubes are Electro-Harmonix 300B (made in Russia). A dedicated AC power cord is included.
A rare and valuable piece from a legendary Japanese tube amplifier specialist.
・Power Supply Voltage: AC 100V, 50/60 Hz
We always send the item with a tracking number. So please place an order without any concern on delivery. You can always track the delivery status.
International buyers – please note: Import duties, taxes, and charges aren't included in the item price or postage cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.
All import duties and taxes for shipments to the United States are fully covered by us, so there will be no additional charges for the buyer. However, for items priced over $2,500, shipments will be handled under DDU (Delivered Duty Unpaid) as before.