The MB Quart ONX254SQ 10" square subwoofer is your subwoofer of choice, should you seek a rugged, punchy sub with tight space restrictions. The construction and design of the unit mimics that of the Kicker Solobaric however has a classier look. The rubber surround is what is most impressive to me, allowing for deep excursion, can't be beat. The unit even has an optional 12v input for illuminating the Quart logo on the dust cap, for those that want to get styling! I have a ONX254SQ installed in the recommend sealed 1.5cf customer enclosure. It is wired by only one of its single DVC's to an MB Quart Formula 240 watt amplifier (bridged mono). The combination of the Quart sub and amp really thumps in my 2009 Mazda 5. For a single 10" subwoofer, the system produces clean, tight and accurate bass that rattles my house windows while I'm in my driveway. Highly recommended for those with smaller vehicles that want the 'boom' to sound like a pair of 12's!
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