Enclosure Finder

Find the Right Subwoofer Enclosure

Behind-seat truck boxes, loaded systems with the driver already mounted, and enclosures cut for one specific subwoofer. Every Proline X box is CNC cut to order in our Tullahoma, Tennessee shop and matched to the driver it houses, so the box and the sub work as one system instead of two parts that happen to fit.

Built In-House on ShopSabre CNC
Designed by an SQ Competition Judge
Hands-On Expertise Since 1985
Fast Shipping from Tennessee
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Truck and Vehicle Specific Enclosures

Behind-seat and underseat enclosures engineered for one cab and one model year range. These are the boxes we build most, and they fit without trimming, shimming, or losing your seat travel. Check the year range on the listing before ordering, because the platforms changed and the boxes are not interchangeable.

Building a truck we do not list yet? Tell us the year, cab, and driver and we will quote a one off. Call or text 931-563-5151.

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Shop by Your Subwoofer

The fastest route if you already own the driver. These enclosures are built around published Thiele Small parameters for each specific subwoofer, with net volume, port tuning where applicable, and mounting depth matched to that model rather than approximated from a generic size chart.

We are the only enclosure builder cutting boxes for the ResoNix GUS. If your driver is not listed, we run the routers ourselves and can cut a variant that is not in the catalog, including a different net volume or cutout diameter. Call or text 931-563-5151.

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Shop by Enclosure Type

Loaded means the subwoofer arrives already mounted and wired, so it is ready for an amplifier out of the box. Sealed gives you a shallower rolloff and tighter transient response in a smaller cabinet. Ported trades size for output near the tuning frequency. Unsure which your driver wants? Divide its resonant frequency by its electrical Q and run the result through our EBP calculator.

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Shop by Subwoofer Size

Useful when you know the size you have space for but have not settled on a driver yet. Remember that cone diameter alone does not determine box volume. Two 12 inch subwoofers can call for very different enclosures depending on their compliance and resonance.

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Shop by Proline X Series

Four series, each a different construction approach. Performance is universal fit by size. Performance Optimized and Professional are cut for one specific driver. Micro is stack fabricated for shallow mount subwoofers. If you already know the line you want, start here.