Single Ended eXperimenter's Kit 3.0 for Headphones & Sensitive Speakers - Bottlehead
Bottlehead Corp. - Fire-Crack! From now through July 4th you can show your independence by ordering a made-in-America headphone amp kit that you build yourself. We will be transitioning to a universal
I built a Bottlehead Crackatwoa and it is shiny : r/headphones