**** important: tube and adapter are factory matched and should not be separated****

NOS (new old stock) ultra-premium grade, driver tubes 5842 / 417A with Custom Adapter [31mm in diameter].

• Upgrade driver tube for WA23 LUNA (matched pair) or WA33 (matched quad)

• 60 days warranty on NOS tubes

• 1-yr warranty on custom-made adapters

A rare driver tube that elevates the already exceptional WA33 amplifier to jaw-dropping sonic performance. We designed the custom adapter specifically to cater to this beloved tube.

Recommended for the following headphones:

• AB1266, 1266 Phi and 1266 TC by ABYSS

• Diana v2, Diana Phi by ABYSS

• JOAL by ABYSS

• RAAL 1995. MAGNA, IMMANIS

• HiFiMan Susvara / Susvara Unveiled, HE-1000 Unveiled

• Audeze LCD-5, LCD-4

• Dan Clark Audio (DCA) Stealth, Expanse

• 5842 / 417A / CV3789 Tube with Custom-made Adapter

• WA23 LUNA [pair]

• WA33 Standard Edition [quad]

• WA33 Elite Edition [quad]