Another headamp - LC-King clone

Found David Lin's LC-King circuit while browsing the web. Tried to build one. To my surprise, its performance is close to (or maybe even better than) my loaded PIMETA. Details about my version of this headamp:

• Uses LM317 regulator


• Class A


• Virtual ground circuit using BUF634. 2 x 220uF rail to rail. 2 x 470uF + 3.3uF from each rail to virtual ground


• No input capacitors


• Volume control circuit wired as shunt attenuator


• Currently using OPA2111BM for U1 and TL072 for U2