for sq i love the image dynamics id10 v.3 (im going with the 12's)
after reading alot of post about edesigns they seem to be sketchy to me and the preorder was already supposed to be shipped and there still not shipping
a few more options would be the koda 10 from adire it has the new xbl2 technolgy and should sound very smooth and have alot of clean thump to it with 18mm xmax and only needing 250-300 watts to reach xmax
another sub is the Creative Sounds SX10 which was the first cheaper 10 to use the xbl2 tech (home sub but works very well in cars)
i like my jl audio 10w0 better than any of the fosgate subs i've had...he, he2, hx2. it only takes like 5.5 inches to mount and only needs 150 watts. and it still hits just as hard, or harder than the other ones. plus the more power a sub can handle, the more money you will have to spend on an amp. thats just my $0.02.
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