I've installed the XS-10FA's, XS12's, and 12" XXX's. The FA's sounded much better compared to the Kicker KM10's and Clarion FA subs, the XS12's compared to several others and IMO sounded about the best in it's price point, and the XXX's were compared to a DD 3512. I know the XXX's can take a pretty good beating as I've played the 2 in my boat pretty hard with no problems....
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