Alright SMD, I'm new here, but I've been somewhat in car audio for a while, as of right now I downsized from what I had to 1 Alpine type R 12" in a 2000 ford explorer. People told me that those were some of the best that i could get, but..looking around here i've realized how much they get put down here, and now I'm really considering getting an 18" sub and building my own box to put in the back of my truck. Just want some input on what what brand sub i should get, my budget is going to be about $400 most likely. I'll need an amp too.. just post and let me know, been looking at Fi, DD, Dc, and AA, honestly can't decide, and don't know what i should get. Thanks in advance
ALSO: I COULD USE SOMEBODY TO DESIGN A BOX FOR A SINGLE 18" SUB, PORTED. THANKS