Bro I got 2 sundown SD 8's in a ported box made by Dan horner in MN he won mwspl his class at over 163db honestly was gonna buy a SA 15 he's a sundown dealer sold me these 2 and a twisted sounds 1k they do 144 DB in current box stock electrical amp used only 4 hrs an subs the same got a SUV for winter so will part with if interested there 169 new sell both for 220 ship box at cost