whats the best subwoofer?

I have to agree with wvsquirrel. Im running 2 15inch RF punch Hx2s. The RFL by MTX is pretty good too. i dont know how much that is over 400$ though.dream it, build it, fiberglass it

my personal favorite is jl audiomecp

Lots of good affordable ones out there but around a hundred bucks. Diamond Audio CM3's, Infinity Reference or Kappas, MTX 6000, Kicker Comp VR's, RF Puch HE's. I go by my ears so these are just ones i have personally heard.

i've got a set of infinity reference and kappa's (all 4 are 10").  really accurate in the sealed box.  the kappa's sound better though.  but the reference are only like $80 a pop now.toyota echo...perfect sound named vehicle

i like the alphasonik 800 series 12's

-Image dynamics idmax series -Mb Quart Both have amazing SQ Dyer

Definately look into the Image Dynamics IDMAX subs, they are unreal! excellent SQ and power handling

I agree with purerf. I have a pair or 12" punch hx2's with a MA Audio 5011x wired to 1ohm. I pound the crap out of them in a daily driver and they haven't complained one bit. I am stepping up to the diamond audio tdx 15's in my truck. You can get them for $399.99 with no shipping charge from Onlinecarstereo.com. I only paid $250 total for both of my hx2's.Pioneer DEH-P980BT, Zapco DCREF1000.4,Pioneer TS-C520PRS, Adire Extremis, MTX TA91002, TC Sounds TC-3000 15"