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The 2A3 is the classic 2.5 V directly-heated power triode – about 3.5 W of the purest single-ended sound. Shuguang produces the complete family: 2A3B, 2A3C, the Nature Sound 2A3C-T and the Treasure 2A3C-Z.
Lineup
2A3C
Classic series – the standard modern production 2A3.
2A3C-T (Nature Sound)
Nature Sound premium version.
2A3C-Z (Treasure)
Treasure series with black carbon-coated bottle.
2A3B
Alternative classic version, design-finalized in 2004.
Specifications
Click an image to view the full-size specification sheet.
📄 Shuguang Catalogue 2024 (PDF)
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*We also accept custom orders for factory-level burn-in, precision testing, matched pairs / quads, special grading and OEM requirements. For a quotation or consultation, please contact us here.