The output end of the range

15 Inch Subwoofer Boxes

Fifteen inch cabinets, mostly wedge, CNC-cut in Tullahoma, Tennessee.

15 inch Subwoofer Enclosure - Audio Intensity

The output end of the range

A fifteen is not a louder twelve. It moves substantially more air for the same excursion, which means it reaches its output with less cone travel and less distortion, and it asks for a cabinet volume that rules out most of the places a twelve would go.

Sealed and ported, mostly wedge, machined in Tullahoma, Tennessee. Most are cut to the parameters published for one driver, and the universal P15-S takes any fifteen that clears it.

15 inch cabinets in stock | sealed and ported | wedge leads the range | single and dual | driver-matched and direct fit | cut in Tullahoma

Cut, assembled and finished in Tullahoma, Tennessee, on ShopSabre routers from Langboard Elite MDF.

Net volume for a driver-matched cabinet is calculated from the parameters the driver manufacturer publishes for that model. Universal-cutout cabinets are cut to a standard cutout and a stated volume range instead.

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Best 15 Inch Sealed

Proline X Performance P15-S Sealed Enclosure for 15-inch Subwoofers

Proline X

Proline X P15-S | Single 15" Sealed Subwoofer Enclosure | V3

Performance Series single 15 inch sealed V3. Universal fit for any standard 15 inch driver, the most accessible 15 inch option.

$ 219.99

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Best 15 Inch for ResoNix Owners

Proline X Micro Series 15" Sealed Enclosure - Fits ResoNix GUS 15 - Proline X Subwoofer Enclosures for car audio systems

Proline X

Proline X Micro Series 15" Sealed Enclosure | Built for ResoNix GUS-15

Built for the ResoNix GUS 15. We build for drivers we don't sell, no questions asked. Stack-fab construction, GUS 15 matched.

$ 349.99

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15 Inch Enclosures by Series

The series decides how the cabinet is built and how much bracing it carries. At this size the bracing is doing real work, because the panel areas are large and the pressures are high.

Every active 15 inch cabinet in stock.
SeriesFront baffleCutoutBest for
Performance Optimized1.5 in doubleCut to one driverYou know the driver and want the box matched to it
ProfessionalDouble or tripleCut to one driverReference builds where the cabinet is the point
Micro Series1.5 inCut to one driverThe rare shallow-mount fifteen, where depth is fixed by the vehicle
Performance0.75 in singleUniversalA universal cutout when the driver is not decided
Vehicle SpecificVaries by platformCut to one driverDirect fit in a named vehicle and year range

Shared across every row: Langboard Elite MDF cut on ShopSabre routers in Tullahoma, Tennessee. Plush black carpet. A Proline X ABS and carbon fibre composite terminal cup with stainless hardware, pre-wired in 12-gauge OFC. Construction method varies by series and is stated on each product page.

Wedge Leads at Fifteen Inches and Nowhere Else

A cabinet this tall usually has to lean on something, and a taper on the rear panel turns dead space behind a seat back into usable volume. The baffle stays vertical so the driver still fires forward. That is why the shape that is a minority at every other size is the majority at this one.

Plan the Space Before the Driver

Net volumes at this size run to figures that will not fit a sedan trunk without planning, and a ported fifteen needs room for the port on top of its net volume. Measure the whole opening rather than the face, and settle the cabinet before you settle the driver.

Driver-Matched, and Volumes That Need Planning

Performance Optimized is the bulk of the range, cut to one driver on a 1.5 inch double baffle. Professional sits above it with heavier baffle and bracing work for the drivers that justify it, and Micro Series covers the rare shallow-mount fifteen. There is a direct-fit under-seat build as well, which is unusual enough to be worth its own look.

Net volumes here run to figures that will not fit a sedan trunk without planning. That is the trade a fifteen asks for, and it is why the shape and the space matter more on this page than the driver brand does.

Driver-matched

Performance Optimized Series

The bulk of the range

The bulk of the fifteen inch range. Each cabinet is cut to one driver published parameters on a 1.5 inch double baffle, mostly as a wedge.

Cut to one driver

Reference build

Professional Series

Reference builds

Heavier baffle and internal bracing, which does real work at this size because the panel areas are large and the pressures are high.

Cut to one driver

Shallow mount

Micro Series

Shallow-mount builds

The rare shallow-mount fifteen, stack-fabricated with dowel reinforcement for a space whose depth the vehicle decides.

Cut to one driver

Baffle thickness and construction method vary by series. Each product page states how that cabinet is built and, where it is driver-matched, which model it was cut for.

Categories

Keep Reading

Supporting guides to help you design, build, and tune your system.

15 inch Subwoofer Box Questions

Is a 15 inch subwoofer worth it over a 12?

If you have the volume for it. A fifteen moves substantially more air for the same excursion, so it reaches its output with less cone travel and less distortion. What it asks for is cabinet volume, and a fifteen in a box too small for it will be beaten by a twelve in the right one.

Why are most of these wedge shaped?

Geometry. A cabinet this tall usually has to lean on something, and a taper on the rear panel turns dead space behind a seat back into usable volume while keeping the baffle vertical so the driver still fires forward. At smaller sizes the wedge is a minority shape; at fifteen inches it is the common one.

How much space does a 15 inch box need?

More than most vehicles have without planning for it, and a ported fifteen needs room for the port on top of its net volume. Published external dimensions are on every listing. This is the size where the space decides whether the build is possible at all.

Can a 15 go under a seat?

In specific trucks, with a shallow-mount driver and a cabinet cut for that exact cab, yes. There is a direct-fit under-seat build in this range. Do not assume the same is possible with a conventional fifteen inch driver, because the geometry only works when the driver is shallow enough.

What amplifier does a 15 need?

Work from the driver's RMS at your final wired impedance rather than from peak figures. A fifteen reaches its output with less cone travel than a twelve, which makes it easy to underestimate what it wants. A monoblock rated at the driver RMS at that impedance is the standard approach.

Are these sealed or ported?

Mostly sealed, with a ported group for the drivers built to take that loading. Every sealed cabinet ships with polyfill already installed. Ported cabinets need more airspace again for the same driver, which is a real consideration at this size.

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Last updated August 29, 2026