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Skar Audio engineered this custom vehicle specific ported quad 8-inch subwoofer enclosure specifically to fit under the rear cab seat of 2019-Up Chevrolet Silverado/GMC Sierra Crew Cab trucks. Unmatched by anything else on the market today this subwoofer enclosure was designed from the ground up by our master craftsman to ensure it is a perfect fit in the vehicle all while preserving the limited cargo space most audiophiles are reluctant to give up. Featuring a split bi-chamber design the enclosure is extremely strong with each of the chambers housing two subwoofers and each utilizing their own individual ports. The ported engineering of this enclosure allows for deep and thunderous bass output across the low end frequency spectrum. Constructed out of only the finest materials including premium-grade MDF the quality of this box is evident from the minute you open the packaging. From there each speaker hole features it’s own independent wiring terminal cup which is pre-wired internally to 12-gauge OFC speaker wire leads. Finally the enclosure is finished in an attractive automotive-grade black trunk-liner carpeting allowing it to blend in with your your vehicles interior.