My current HT sub is crap, it's 'David-301 D-BOX 12" powered sub from costco'. It's pathetic! Could i use a car audio sub with that amp and get better SPL and SQ? Would it even be worth it? The sub i have available is a alpine DVC 4ohm+4ohm, Fs 29Hz, Vas 45L, Qts 0.47. I am willing to build a box to spec if i need to.