Is Acoustic Research Performance cable(AP053) good enough to work between H/K 520 and Dayton 15" or I better move to something more expensive? (A/R Pro series, AVCable's etc)? And why do you have so many inputs/outputs on the PE-250? After all subwoofer cable is just RCA-to-RCA cable, so it needs only one in and one out, right? PE-250 has like 6 ins and 6 outs.