I have a HLK avr5550. Theres a subout RCA plug on the back panel of mine (its a mono subout) which i have connected to my sub line in. The model you have should have something similar. i dont know about the sub u are using. If its an active sub ie it has its own amp then it most likely will have a line in RCA jack. I use subwoofer cable made by monster cable. Hope this helps you.