Well my Diamond sub needs to be fixed, I am going to get an estimate on that as soon as I leave work (around 5 pm) if it costs alot to be fixed, I will need a replacement. My NINe.4 is running all my comps on channels A and B. I will run the sub bridged on channels C & D, and set the amp correctly. It REALLY sucks right now because I have NO BASS!! My Diamond mid comps are sent it in for warranty and my mid bass sub is out of order. Hopefully my Diamond sub won't cost alot to fix but I'd like to have an insurance policy in case it costs alot