I added low pass filters and bought a Rockford fosgate 8" shallow mount and the poly batting. Part of the problem is the sub gets a full signal and all the highs come through and sound like doodieballs. I spent ~$150 and it's probably 10-20% better. I'd honestly use the money toward an LOC, amp, and decent 10" sub, which could probably be had on the used market for $4-500.Just bought a 2014 st2 and i like the way the factory sub sounds but was curious if there are any cost effective way to make it sound just a little bit better
heck, at $550, you could buy a brand new alpine 500w mono amp, 12" type S sub, ported box, all the wiring needed to hook it all up and have Best Buy do the install for you. good stuff used should cost half or even less.I'd honestly use the money toward an LOC, amp, and decent 10" sub, which could probably be had on the used market for $4-500.