Does it make me a very bad person to point out that those look like a 1/4" socket, a 6.35mm socket and a volume control? As in what you would need to fit to a headphone amplifier/DAC...

Mark
G68, baby Genelecs, Humax Foxsat, Oppo+Vanity93, Toshiba HD-A35, Pioneer CLD-925 + Meridian 519, various other random bits and bobs
Got a black G08.2 you want to sell?