Hey there, can anyone help me. Ive got a pioneer amp & reciever, (model sx-339) and need to know the best way to connect my wharfdale powered sub so that the volume is controled by the amp. Am I right in thinking the 3.5mm "control" out on the rear of the unit would do this? Obviously to connect the sub I'll use a 3.5mm to rca converter. Is this the best way to go about this? And if so what shall I run into the 3.5mm "control" input? Please can someone help?