Currently having a lot of fun with the LCD-X phones and Deckard Class A amplifier - that thing runs hot, registers 112F on the chassis, with 77F ambient temperature. Decided that it was either going to be tubes and Stax, or if SS and cheaper, then it must be Class A, and this is probably one of the very few ones out there; also love its analog power supply; really great build quality. https://www.audeze.com/products/deckard

