I have 2 Boston Acoustics Rally-10 10 inch subwoofers.
These are 8ohm models. They are designed to be used in parallel to allow amplifiers to produce more power bridged to mono!
Combined these will handle over 350 watts!
I had these same style woofers in my car system a few cars ago, and when used in a 1.5 cubic foot box ported with a 4 inch port with 1.4 in diameter, these had good low end extension, and yet still played with great pitch and definition!
You will not be disappointed, as you can't find any off brand or 'store' brands that are as good as these! Especially for the price!