Polk Audio DXi690. The local stereo shop owner has a Crewmax with a full Hertz system with two JL Audio W7's and I must say it sounds so clean, nothing stupid loud like some subs and stereos you hear. I'm gonna try to copy his system here soon. If you're looking to add a subwoofer definitely look into the W7's! I have a 10" Kicker Solo-baric L7 and I love it but the JL Audio W7 better imho.
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