Step 21: Installing a studio-compliant 6.3mm stereo socket (passive mixer) Parts Used: * Göldo J002G 1/4 inch/6.3mm gold stereo socket (Thomann audio store, for example) * A length of wire and heat shrink tube * A 12mm drill, a countersinking cutter will do nicely ("Senkbohrer" in german) * A roll of electrical insulating tape * Your favourite soldering equipment Description: * First, extend the hole for the old 3.5mm socket to 12mm (photo 1 before modification and 2 after