Alpine X-W10D4. 10” subwoofer with a Sound ordnance sealed box (BB1064S) With 900 watts rms this thing kicks you in the chest. The bass response is very tight and super accurate being a 10” especially in this sealed box. Pretty much the best that Alpine has to offer. I also have an additional ported box for an extra $40. Do not low ball. This is a brand new item. Simply opened and assembled.
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