I've got a Kenwood KAC-648s 4/3/2 Channel amp. I am trying to get it to run an MTX Thunder 7500 10" Dual Voice coil sub....That's it, no other speakers at this time. How can I get this to work. I've tried a bunch of wiring combos but nothing out of the sub. Yes, the amp has power and should be getting signal from the line converter I had to hook up to the stock deck in my truck