Siemens 5814A (12AU7) in Metal Can filmbox (Matched Pair) - NOS (New Old Stock, 從未啟用過！) - 長屏 - 細圓環 - 十字𠝹頂 - 已配對 - 西德製造 - 分析力高, 高低延, 低頻相當厚潤, 古典友合用 被公認是最好的5814A / 12AU7之一！

- Nos in original metal can film box.

- Matched pair 

- Made in West Germany - Long plate, Triple mica and O-getter Great Series and super rare now in Siemens tubes!