Hello all , need some acvice please . Running an Onkyo SKS-HT528 speaker system off a Onkyo receiver TX-SR507 . Have setup with the Audyssey 2EQ all seemed ok except for the subwoofer . I have connected as per instruction ( I think ) and the Audyssey appeared to find it , but , normally 1st thing for about 5 minutes, the sub makes loud banging noises as if turning itself off then on , driving me bonkers !! Any ideas , thanks in advance .