You don't need AC 12 or AC 11. It works fine with a digital cable from a G68 (ADV) but you need to configure your DSP5200 (one master) for Digital input. Then use a coax cable to connect the G68 to the DS5200 speakers and center. You also need to configure your G68 with Meridian Config program to set up 2 DSP5200 and 5200 Center.