I have a single behind the seat 12 ported box and I have a little cheap skar that’s going out so I want to upgrade to a sundown sld 12 but don’t know which would be better for my setup d2 or d4. I have skar 2000.1 amp which is rated at 2152 rms at 1 ohm 1400rms at 2 ohms and 800 at 4 ohms I...