4'' coil (hard to find even the 18'' solo x dosint have one that big)

cant find one

if you want alot of bass you got to give up some room, im runing 2 bxi 2006d's 2000rms (each) the subs take it like its nothing

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15'' hx2 thay were ok 15'' he2 were good

enough to pop my trunk..ask my bro

hits solow I feel like im having boul movments

I love these speakers..

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alpine cda-7839

shakes the crap outta you. hitts very well in the low lows under 50 hz.

not much to talk about in the upper range over 50 hz. loud but not good.

these subs are very good. i have 2 in a 8 cubic foot box with a 75 square inch port that is 17 inches long. avril lavigne's skater boy first part bass really hits. i had 12 10s in a 14 cubic foot box running 3 times the wattage (3000) and these 18s come real close to them. they are great for bass under 50 hz but im going to suplement them with 8 10s for 50 to 100 hz.

none

everything

It was okay, I guess. Nothing but low bass, but the lows weren''t even that low. Takes up space.

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MA Audio all models, Pioneer, earthquake, mtx, american pro, kenwood, audiobahn, jbl, autotek, hifonics, soundstream, yamaha, sony, bluapunkt, ground zero, mmats, gs redline, gsi, msx, kove, kicker, l