Ive finished connecting my system and I'm peed off to say the least. Ive got q acoustics q7000 5.1 system and denon 2113 amp. all connected up correctly as per instructions ran setup as instructed everything ok apart from the sub, its sound god damn awful, like a fart i have triple checked the connections played with all the settings but no luck it is just connected with the lead that came with it as I'm waiting on the arrival of my other but it still shouldn't sound this bad!! my predicament is which is broke the amp or sub how do i test? i have no other amp or powered sub. I guess it needs returning but which the amp or sub? (i bought them from separate places) any help appreciated as I'm going to ring them tomorrow.