Heaven11 Audio Upgraded Gold Pin Tubes
The Billie Mk2 integrated amp is already an incredible piece, but the fun improves even further with an upgrade to a set of hand-matched, close-tolerance JJ ECC99 "Gold Pin" tubes. This upgrade is only available to new Billie Mk2 owners. The Gold Pin tubes are marked and paired based on their tested output, and increased stability. What seem like incremental improvements in tube output result in big improvements in clarity with the Billie design.
Sold in matched pairs and available in very limited quantities.
Available as an accessory purchase to new Billie Mk2 purchases only.