Speaker and power and headphone amplifier designing and building on DIYAudio.com
DT880-250 Chrome, MDRV6, Aurvana3, Status Audio OB-1, KZ ZS5
Headphone Amp Inventory:
Lots - all DIY Class A mostly. Fiio A5, Agdr Super CMOY 1688.
Pocket Class A SE headamp, Salas DCG3, several versions of BF862 JFET front end CFP amps with MOSFET output stages. F5 headamp. DAO headamp with Juma BF862 preamp. See my inventory here:
Reference amp is DIY BF862/Toshiba 2SA1837 CFP single ended Class A with cap multiplier and cap bank.
Scarlett Solo 2G, xmos U8 with BB PCM5012A, UCA202 DACs.
Shunt regulated and capacitance multiplier PSU's. SMPS and toroidal transformer fed.
Other Audio Equipment:
Dozens of Class AB and Class A speaker amps - all DIY.
See some of my amps here:
I designed and made first pocket size portable single ended Class A Headamp.