I recently purchased a 12" SSD Dual 2 copper coil. I had to wait on the sub and amp but got them in about 2 weeks later. They're rated at 800w RMS so I got an 800w at 1 ohm amp for it. I ran the sub for about 20-30 minutes from my home to work. I had the gain between half and 3/4 up, the bass boost dail about 1/4 of the way and the sub sounded great. Well after work I got back in my blazer and when I turned the HU back up the sub just wasn't putting out what it had been. So I used a different HU, changed all the wires, re-tightened the power wire to the battery. Got a new amp in addition to the new one I had ordered for the sub(the one I had used on the sub in the first place). Reset the HU, re-set all my gains, and nothing new happened. After all that the sub sounds is still barely making any noise at all, even if I turn the LPF up high and the gain 3/4 or beyond the sub barely responds. I even checked the tinsel leads because I heard of a bunch of problems with those, those seem fine too. Can someone please tell me what the problem is or is there any way I can get a refund/exchange for a new sub?