Hello. I’d like to introduce myself to these forums. I have a passion for electronics and all things audio. I’ve built several DIY kits for headphone amplifiers. Some including Tangents PPA and a three channel amplifier from AMB labs the Beta22 including the Sigma power supply. Recently, I refurbished a vintage Harman Kardon HK250 tube power amplifier from the ground up. I make my own custom cables (XLR, RCA including headphone cables) all for my own personal use.