Sealed and Ported, Wedge and Down Fire, 8 to 15 Inch

PowerBass Subwoofer Boxes and Enclosures

Sealed and ported enclosures cut for PowerBass subwoofers in wedge and down-fire, CNC-machined in Tullahoma, Tennessee.

PowerBass builds subwoofers across a wide range, and the enclosure that suits one of them does not suit another. These cabinets are cut per model: the sealed ones to the airspace PowerBass specifies, the ported ones to an alignment solved from its published parameters, in whichever shape the install allows.

Two decisions, in order. The vehicle picks the shape: down-fire if height is the constraint, wedge if floor space is. Then the driver picks how low it goes, and that range is wider than the diameters suggest.

Sealed and ported PowerBass enclosures from 8 to 15 inch, single and dual, in rear-firing wedge and down-fire, all Performance Optimized on a 1.5 inch double baffle.

Cut, assembled and finished in Tullahoma, Tennessee, to the airspace PowerBass publishes for each sealed build and to its published parameters for the ported ones.

Driver parameters, recommended airspaces and fitment dimensions are taken from PowerBass published data, including their owner's manuals and cutout templates. We build enclosures to those figures; we do not stock PowerBass drivers and make no claim to represent the brand.

Shop the Lineup

Proline X PO 10-S DF XLT sealed down fire enclosure, front panel on 1.75 inch feet, 21.1 by 4.9 inches.

FitsPowerBass XL-1040T

PowerBass XL-1040T Box: Sealed 10" Down Fire Enclosure

$ 249.99

In Stock

Details

Performance Optimized Series PO 8D-S W XL speaker enclosure by Proline, featuring a black frame with two circular openings, shown on a dark blue background with dimensions labeled 32 inches wide and 11 inches deep.

FitsPowerBass XL-844

PowerBass XL-844 Dual Box: Sealed 8" Wedge Enclosure

$ 269.99

In Stock

Details

Proline X PO 12-S DF XLT sealed down fire enclosure, front panel on 1.75 inch feet, 24.9 by 5.3 inches.

FitsPowerBass XL-1240T

PowerBass XL-1240T Box: Sealed 12" Down Fire Enclosure

$ 259.99

In Stock

Details

Proline X PO 10-S W XL1044 sealed wedge, front baffle with gloss black insert and pre-wired leads, 22.1 by 13 inches.

FitsPowerBass XL-1044

PowerBass XL-1044 Box: Sealed 10" Wedge Enclosure

$ 289.99

In Stock

Details

Proline Performance Optimized Series PO 10-S W 2XLD subwoofer enclosure shown on a dark blue background with product dimensions, specifications, and branding.

FitsPowerBass 2XL-1040D

PowerBass 2XL-1040D Box: Sealed 10" Wedge Enclosure

$ 289.99

In Stock

Details

Proline X PO 10D-S DF XLT sealed down-fire enclosure, 30 inches wide by 5.86 inches tall, feet add 1.75 inches. Optimized for PowerBass XLT.

FitsPowerBass XL-1040T

PowerBass XL-1040T Dual Box: Sealed 10" Down Fire Enclosure

$ 279.99

In Stock

Details

Proline X PO 12D-S DF XLT sealed down-fire enclosure, three-quarter view of both flush-mount baffle openings and the side terminal cup. Optimized for PowerBass XLT.

FitsPowerBass XL-1240T

PowerBass XL-1240T Dual Box: Sealed 12" Down Fire Enclosure

$ 289.99

In Stock

Details

Proline X PO 8-P W S84 ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 11.75 inches.

FitsPowerBass S-84

PowerBass S-84 Box: Ported 8" Wedge Enclosure

$ 349.99

In Stock

Details

Proline X PO 10-S DFW XLT sealed down-fire wide enclosure for the PowerBass XL-1040T, 41 inches wide by 4.9375 inches tall, feet add 1.75 inches of height.

FitsPowerBass XL-1040T

PowerBass XL-1040T Box: Sealed 10" Down Fire Wide Enclosure

$ 339.99

In Stock

Details

Proline X PO 12-S W XL sealed wedge enclosure, front baffle with gloss black insert and pre-wired leads, 28.1 by 15 inches. Optimized for PowerBass.

FitsPowerBass XL-1244

PowerBass XL-1244 Box: Sealed 12" Wedge Enclosure

$ 369.99

In Stock

Details

Proline Performance Optimized Series PO 12-S W 2XLD subwoofer enclosure, showing a black acrylic front cover with a circular wood-grain insert and dimension markings of 19.77 inches by 15 inches.

FitsPowerBass 2XL-1240D

PowerBass 2XL-1240D Box: Sealed 12" Wedge Enclosure

$ 369.99

In Stock

Details

Proline X PO 12-S DFW XLT sealed down-fire wide enclosure for the PowerBass XL-1240T, 41 inches wide by 5.3125 inches tall, feet add 1.75 inches of height.

FitsPowerBass XL-1240T

PowerBass XL-1240T Box: Sealed 12" Down Fire Wide Enclosure

$ 349.99

In Stock

Details

Proline X PO 10-P W L1004D ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 13.5 inches.

FitsPowerBass L-1004D

PowerBass L-1004D Box: Ported 10" Wedge Enclosure

$ 389.99

In Stock

Details

Proline X PO 10-P W M1004 ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 13.5 inches.

FitsPowerBass M-1004

PowerBass M-1004 Box: Ported 10" Wedge Enclosure

$ 389.99

In Stock

Details

Proline X PO 10-P W M1004D ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 13.5 inches.

FitsPowerBass M-1004D

PowerBass M-1004D Box: Ported 10" Wedge Enclosure

$ 389.99

In Stock

Details

Proline X PO 10-P W S1004 ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 13.5 inches.

FitsPowerBass S-1004

PowerBass S-1004 Box: Ported 10" Wedge Enclosure

$ 389.99

In Stock

Details

Proline X PO 10-P W S1004D ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 13.5 inches.

FitsPowerBass S-1004D

PowerBass S-1004D Box: Ported 10" Wedge Enclosure

$ 389.99

In Stock

Details

Proline X PO 10-P W S10T ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 13.5 inches.

FitsPowerBass S-10T

PowerBass S-10T Box: Ported 10" Wedge Enclosure

$ 389.99

In Stock

Details

Proline X PO 10-P W S10TD ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 13.5 inches.

FitsPowerBass S-10TD

PowerBass S-10TD Box: Ported 10" Wedge Enclosure

$ 389.99

In Stock

Details

Proline X PO 10-P W XL1004D ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 13.5 inches.

FitsPowerBass XL-1004D

PowerBass XL-1004D Box: Ported 10" Wedge Enclosure

$ 389.99

In Stock

Details

Proline X PO 10-P W XL1040 ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 13.5 inches.

FitsPowerBass XL-1040

PowerBass XL-1040 Box: Ported 10" Wedge Enclosure

$ 389.99

In Stock

Details

Proline X PO 10-P W XL1040D ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 13.5 inches.

FitsPowerBass XL-1040D

PowerBass XL-1040D Box: Ported 10" Wedge Enclosure

$ 389.99

In Stock

Details

Proline X PO 10-P W XL1040T ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 13.5 inches.

FitsPowerBass XL-1040T

PowerBass XL-1040T Box: Ported 10" Wedge Enclosure

$ 389.99

In Stock

Details

Proline X PO 10-P W XL1044 ported wedge, front baffle with gloss black insert and pre-wired leads, 30 by 13.5 inches.

FitsPowerBass XL-1044

PowerBass XL-1044 Box: Ported 10" Wedge Enclosure

$ 389.99

In Stock

Details

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Two Shapes, and the Vehicle Picks

Every enclosure here is cut for a specific PowerBass driver, sealed or ported. The first decision is not the subwoofer, it is where the cabinet has to live.

Sealed Performance Optimized cabinets for PowerBass subwoofers, across two chassis. The ported wedges are covered below.
	Down Fire	Wedge
Goes where	Under or behind a seat	Trunk or cargo area
Constraint it solves	Vertical height	Floor space
Installed height	6.65 to 9.03 in including the 1.75 in standoff	11 to 18 in, sits against the seat back
Driver	XL-T shallow mount only	XL, 2XL and 3XL conventional depth sealed; L, M, S, XL, 2XL and 3XL ported
Sizes	10 and 12 inch, single or dual	8, 10, 12 and 15 inch
Net airspace	0.30 to 0.40 cu ft per driver	0.50 to 2.25 cu ft per driver
Alignment	Qtc 0.91 to 1.15, firm by necessity in that little air	Sealed Qtc 0.60 to 0.71, well damped; ported tuning per driver
Price from	$239.99	$229.99

Then the Driver Picks How Low It Goes

This is where the range differs most, and it is worth reading before you shop on diameter. Half power lands anywhere from 46 to 62 Hz depending on the driver, and the two sealed 12 inch wedges are 16 Hz apart from each other. A bigger cone does not mean a lower cabinet.

Sealed wedge alignments, ordered by how low each driver reaches. All figures anechoic, before cabin gain, computed from PowerBass published Thiele-Small parameters.
Driver	Offered as	Qtc	F3	Character
XL-1244	12 inch, single or dual	0.714	46.2 Hz	The deepest sealed reach in the range and a textbook Butterworth alignment.
3XL-1510D	15 inch, single	0.680	46.1 Hz	Same reach as the XL-1244 with far more cone and a 1500 watt RMS rating.
2XL-1040D	10 inch, single or dual	0.630	51.2 Hz	Long-throw 10 with 11.5 mm of travel, in the smallest cabinet of the 10s.
XL-1044	10 inch, single or dual	0.637	55.0 Hz	The value 10. Efficient, easy to drive, modest excursion.
XL-844	8 inch, dual only	0.610	59.8 Hz	For builds with no room for a 10. Very stiff suspension, dry and quick.
2XL-1240D	12 inch, single or dual	0.601	62.3 Hz	A Qts of 0.334 puts it past the knee for sealed loading. Big cone, big travel, but it gives up the low end a sealed 12 can otherwise reach.

Then the Ported Wedges

For more output than a sealed cabinet gives, ported wedges are cut for six PowerBass lines from 8 to 15 inch. Each carries a triangular corner slot port solved from that driver's published parameters, with the tuning frequency and net volume stated on the listing, and each ships without polyfill because fill would move the tuning.

Ported PowerBass wedges in stock, grouped by line. Single-driver cabinets.
Line	Models	Sizes	Net volume	Tuning
S	S-84, S-1004, S-1004D, S-10T, S-10TD, S-1204, S-1204D, S-12T, S-12TD	8, 10, 12	0.69 to 1.73 cu ft	32.5 to 35.5 Hz
M	M-1004, M-1004D, M-1204, M-1204D, M-1504, M-1504D	10, 12, 15	1.15 to 2.22 cu ft	28 to 33.5 Hz
L	L-1004D, L-1204D, L-1504D	10, 12, 15	1.13 to 2.02 cu ft	31 to 34.5 Hz
XL	XL-1004D, XL-1040, XL-1040D, XL-1040T, XL-1044, XL-104MF, XL-1204D, XL-1240, XL-1240D, XL-1240T, XL-1244, XL-124MF	10, 12	0.82 to 2.23 cu ft	32.5 to 37 Hz
2XL	2XL-1204D, 2XL-1240D	12	1.08 to 1.45 cu ft	32.5 to 35 Hz
3XL	3XL-1501D, 3XL-1502D	15	2.33 to 2.36 cu ft	32 to 32.5 Hz

Shared across every cabinet: Langboard Elite MDF cut on ShopSabre routers in Tullahoma, Tennessee. A 1.5 inch double front baffle. Plush black carpet. A Proline X ABS and carbon fibre composite terminal cup with stainless hardware, pre-wired in 12-gauge OFC. Threaded inserts at every mounting location. Polyfill installed in the sealed builds.

PowerBass Subwoofer Box Directory by Model

We build sealed and ported enclosures for 37 PowerBass subwoofer models, 8 to 15 inch, in down-fire and wedge styles from single, dual, triple and quad woofer cabinets. Open a model to see every box cut for it, with net volume, tuning and outside dimensions. Full specs and fitment notes are on each product page.

PowerBass 2XL-1040D 2 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Sealed, Single	Performance Optimized	0.75 ft³	Sealed	23.76" W x 13" H x 11.32" D, tapering to 6.59"
Wedge Sealed, Dual	Performance Optimized	1.50 ft³	Sealed	32.00" W x 15" H x 13.15" D, tapering to 7.69"

PowerBass 2XL-1204D 2 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.45 ft³	32.5 Hz	30.00" W x 15.50" H x 14.52" D, tapering to 8.88"
Wedge Wide Sealed, Triple	Performance Optimized	2.76 ft³	Sealed	44" W x 17" H x 14.84" D, tapering to 8.65"

PowerBass 2XL-1240D 4 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.08 ft³	35.0 Hz	29.50" W x 15.50" H x 12.77" D, tapering to 7.12"
Wedge Sealed, Single	Performance Optimized	0.75 ft³	Sealed	19.77" W x 15" H x 12.30" D, tapering to 6.84"
Wedge Sealed, Dual	Performance Optimized	1.50 ft³	Sealed	32.00" W x 16" H x 13.17" D, tapering to 7.35"
Wedge Wide Sealed, Triple	Performance Optimized	1.97 ft³	Sealed	44" W x 17" H x 12.64" D, tapering to 6.45"

PowerBass 3XL-1501D 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	2.36 ft³	32.5 Hz	30.00" W x 18.50" H x 17.86" D, tapering to 11.12"

PowerBass 3XL-1502D 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	2.33 ft³	32.0 Hz	30.00" W x 18.50" H x 17.61" D, tapering to 10.88"

PowerBass 3XL-1510D 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Sealed, Single	Performance Optimized	2.25 ft³	Sealed	23.22" W x 18" H x 18.61" D, tapering to 12.06"

PowerBass L-1004D 3 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.13 ft³	34.5 Hz	30.00" W x 13.50" H x 13.41" D, tapering to 8.50"
Wedge Wide Sealed, Triple	Performance Optimized	1.81 ft³	Sealed	40" W x 17" H x 12.49" D, tapering to 6.30"
Wedge Wide Sealed, Quad	Performance Optimized	2.00 ft³	Sealed	44" W x 17" H x 12.49" D, tapering to 6.30"

PowerBass L-1204D 2 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.40 ft³	32.0 Hz	30.00" W x 15.50" H x 14.14" D, tapering to 8.50"
Wedge Wide Sealed, Triple	Performance Optimized	3.36 ft³	Sealed	44" W x 17" H x 16.50" D, tapering to 10.32"

PowerBass L-1504D 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	2.02 ft³	31.0 Hz	30.00" W x 18.50" H x 15.86" D, tapering to 9.12"

PowerBass M-1004 3 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.15 ft³	33.5 Hz	30.00" W x 13.50" H x 13.54" D, tapering to 8.62"
Wedge Wide Sealed, Triple	Performance Optimized	1.81 ft³	Sealed	40" W x 17" H x 12.40" D, tapering to 6.21"
Wedge Wide Sealed, Quad	Performance Optimized	2.01 ft³	Sealed	44" W x 17" H x 12.40" D, tapering to 6.21"

PowerBass M-1004D 3 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.15 ft³	33.5 Hz	30.00" W x 13.50" H x 13.54" D, tapering to 8.62"
Wedge Wide Sealed, Triple	Performance Optimized	1.81 ft³	Sealed	40" W x 17" H x 12.40" D, tapering to 6.21"
Wedge Wide Sealed, Quad	Performance Optimized	2.29 ft³	Sealed	44" W x 17" H x 13.16" D, tapering to 6.97"

PowerBass M-1204 2 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.25 ft³	32.5 Hz	30.00" W x 15.50" H x 13.39" D, tapering to 7.75"
Wedge Wide Sealed, Triple	Performance Optimized	3.33 ft³	Sealed	44" W x 17" H x 16.41" D, tapering to 10.23"

PowerBass M-1204D 2 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.38 ft³	31.5 Hz	30.00" W x 15.50" H x 13.89" D, tapering to 8.25"
Wedge Wide Sealed, Triple	Performance Optimized	3.36 ft³	Sealed	44" W x 17" H x 16.50" D, tapering to 10.32"

PowerBass M-1504 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	2.22 ft³	28.0 Hz	30.00" W x 18.50" H x 16.86" D, tapering to 10.12"

PowerBass M-1504D 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	2.22 ft³	28.0 Hz	30.00" W x 18.50" H x 16.86" D, tapering to 10.12"

PowerBass S-10T 3 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	0.88 ft³	35.5 Hz	30.00" W x 13.50" H x 11.91" D, tapering to 7.00"
Wedge Wide Sealed, Triple	Performance Optimized	5.21 ft³	Sealed	40" W x 17" H x 23.00" D, tapering to 16.81"
Wedge Wide Sealed, Quad	Performance Optimized	5.85 ft³	Sealed	44" W x 17" H x 23.00" D, tapering to 16.81"

PowerBass S-10TD 2 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	0.81 ft³	35.5 Hz	30.00" W x 13.50" H x 11.41" D, tapering to 6.50"
Wedge Wide Sealed, Triple	Performance Optimized	5.21 ft³	Sealed	40" W x 17" H x 23.00" D, tapering to 16.81"

PowerBass S-12T 2 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.57 ft³	33.5 Hz	30.00" W x 15.50" H x 14.64" D, tapering to 9.00"
Wedge Wide Sealed, Triple	Performance Optimized	5.67 ft³	Sealed	44" W x 17" H x 23.00" D, tapering to 16.81"

PowerBass S-12TD 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.73 ft³	35.0 Hz	30.00" W x 15.50" H x 15.14" D, tapering to 9.50"

PowerBass S-84 3 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	0.69 ft³	35.0 Hz	30.00" W x 11.75" H x 10.90" D, tapering to 6.62"
Wedge Wide Sealed, Triple	Performance Optimized	1.18 ft³	Sealed	40" W x 13" H x 10.86" D, tapering to 6.13"
Wedge Wide Sealed, Quad	Performance Optimized	1.58 ft³	Sealed	44" W x 13" H x 11.84" D, tapering to 7.10"

PowerBass S-1004 3 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.11 ft³	33.0 Hz	30.00" W x 13.50" H x 13.16" D, tapering to 8.25"
Wedge Wide Sealed, Triple	Performance Optimized	2.01 ft³	Sealed	40" W x 17" H x 13.03" D, tapering to 6.84"
Wedge Wide Sealed, Quad	Performance Optimized	2.68 ft³	Sealed	44" W x 17" H x 14.26" D, tapering to 8.07"

PowerBass S-1004D 3 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.09 ft³	32.5 Hz	30.00" W x 13.50" H x 12.91" D, tapering to 8.00"
Wedge Wide Sealed, Triple	Performance Optimized	2.01 ft³	Sealed	40" W x 17" H x 13.03" D, tapering to 6.84"
Wedge Wide Sealed, Quad	Performance Optimized	2.68 ft³	Sealed	44" W x 17" H x 14.26" D, tapering to 8.07"

PowerBass S-1204 2 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.57 ft³	33.0 Hz	30.00" W x 15.50" H x 14.64" D, tapering to 9.00"
Wedge Wide Sealed, Triple	Performance Optimized	3.36 ft³	Sealed	44" W x 17" H x 16.51" D, tapering to 10.32"

PowerBass S-1204D 2 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.61 ft³	32.5 Hz	30.00" W x 15.50" H x 14.64" D, tapering to 9.00"
Wedge Wide Sealed, Triple	Performance Optimized	3.36 ft³	Sealed	44" W x 17" H x 16.51" D, tapering to 10.32"

PowerBass XL-104MF 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.27 ft³	35.0 Hz	30.00" W x 13.50" H x 13.54" D, tapering to 8.62"

PowerBass XL-124MF 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	2.23 ft³	32.5 Hz	30.00" W x 15.50" H x 17.52" D, tapering to 11.88"

PowerBass XL-844 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Sealed, Dual	Performance Optimized	1.00 ft³	Sealed	32.00" W x 11" H x 11.80" D, tapering to 7.80"

PowerBass XL-1004D 3 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.15 ft³	34.0 Hz	30.00" W x 13.50" H x 13.54" D, tapering to 8.62"
Wedge Wide Sealed, Triple	Performance Optimized	2.01 ft³	Sealed	40" W x 17" H x 13.08" D, tapering to 6.90"
Wedge Wide Sealed, Quad	Performance Optimized	2.68 ft³	Sealed	44" W x 17" H x 14.33" D, tapering to 8.14"

PowerBass XL-1040 3 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.22 ft³	34.0 Hz	30.00" W x 13.50" H x 14.04" D, tapering to 9.12"
Wedge Wide Sealed, Triple	Performance Optimized	2.01 ft³	Sealed	40" W x 17" H x 13.08" D, tapering to 6.90"
Wedge Wide Sealed, Quad	Performance Optimized	2.68 ft³	Sealed	44" W x 17" H x 14.33" D, tapering to 8.14"

PowerBass XL-1040D 3 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.15 ft³	34.0 Hz	30.00" W x 13.50" H x 13.54" D, tapering to 8.62"
Wedge Wide Sealed, Triple	Performance Optimized	2.01 ft³	Sealed	40" W x 17" H x 13.08" D, tapering to 6.90"
Wedge Wide Sealed, Quad	Performance Optimized	2.68 ft³	Sealed	44" W x 17" H x 14.33" D, tapering to 8.14"

PowerBass XL-1040T 7 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	0.82 ft³	37.0 Hz	30.00" W x 13.50" H x 11.54" D, tapering to 6.62"
Down Fire Sealed, Single	Performance Optimized	0.30 ft³	Sealed	21.05" W x 15" D x 4.90" H
Down Fire Wide Sealed, Single	Performance Optimized	0.546 ft³	Sealed	41" W x 12" D x 4.9375" H
Down Fire Sealed, Dual	Performance Optimized	0.60 ft³	Sealed	30.00" W x 15" D x 5.86" H
Down Fire Wide Sealed, Dual	Performance Optimized	0.606 ft³ total / 0.303 ft³ per chamber	Sealed	41" W x 12" D x 5.5625" H
Wedge Wide Sealed, Triple	Performance Optimized	1.24 ft³	Sealed	40" W x 17" H x 10.64" D, tapering to 4.45"
Wedge Wide Sealed, Quad	Performance Optimized	1.54 ft³	Sealed	44" W x 17" H x 11.14" D, tapering to 4.95"

PowerBass XL-1044 5 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.12 ft³	34.0 Hz	30.00" W x 13.50" H x 13.41" D, tapering to 8.50"
Wedge Sealed, Single	Performance Optimized	0.75 ft³	Sealed	22.13" W x 13" H x 11.82" D, tapering to 7.09"
Wedge Sealed, Dual	Performance Optimized	1.50 ft³	Sealed	32.00" W x 15" H x 13.15" D, tapering to 7.69"
Wedge Wide Sealed, Triple	Performance Optimized	1.82 ft³	Sealed	40" W x 17" H x 12.49" D, tapering to 6.30"
Wedge Wide Sealed, Quad	Performance Optimized	2.19 ft³	Sealed	44" W x 17" H x 13.01" D, tapering to 6.82"

PowerBass XL-1204D 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.68 ft³	33.0 Hz	30.00" W x 15.50" H x 15.52" D, tapering to 9.88"

PowerBass XL-1240 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.24 ft³	34.0 Hz	30.00" W x 15.50" H x 13.52" D, tapering to 7.88"

PowerBass XL-1240D 1 box

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.68 ft³	33.0 Hz	30.00" W x 15.50" H x 15.52" D, tapering to 9.88"

PowerBass XL-1240T 6 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.29 ft³	33.5 Hz	30.00" W x 15.50" H x 13.64" D, tapering to 8.00"
Down Fire Sealed, Single	Performance Optimized	0.40 ft³	Sealed	24.89" W x 15" D x 5.30" H
Down Fire Wide Sealed, Single	Performance Optimized	0.720 ft³	Sealed	41" W x 14" D x 5.3125" H
Down Fire Sealed, Dual	Performance Optimized	0.80 ft³	Sealed	30.00" W x 15" D x 7.28" H
Down Fire Wide Sealed, Dual	Performance Optimized	0.806 ft³ total / 0.403 ft³ per chamber	Sealed	41" W x 14" D x 6.125" H
Wedge Wide Sealed, Triple	Performance Optimized	1.40 ft³	Sealed	44" W x 17" H x 11.04" D, tapering to 4.85"

PowerBass XL-1244 4 boxes

Box	Series	Net volume	Tuning	Outside dimensions
Wedge Ported, Single	Performance Optimized	1.26 ft³	32.5 Hz	30.00" W x 15.50" H x 13.39" D, tapering to 7.75"
Wedge Sealed, Single	Performance Optimized	1.25 ft³	Sealed	28.06" W x 15" H x 12.65" D, tapering to 7.19"
Wedge Sealed, Dual	Performance Optimized	2.50 ft³	Sealed	32.00" W x 16" H x 17.28" D, tapering to 11.45"
Wedge Wide Sealed, Triple	Performance Optimized	3.75 ft³	Sealed	44" W x 17" H x 17.56" D, tapering to 11.37"

Cut Per Driver, Not Per Diameter

A 12 inch box is not a category. The XL-1244 wants 1.25 cubic feet and reaches 46 Hz. The 2XL-1240D wants 0.75 and reaches 62. Both are twelves, both shown here in sealed cabinets, and putting either in the other's cabinet would be a mistake.

So every enclosure here is named for the driver it is cut for, and the baffle, the airspace and the bracing follow from that driver's published parameters rather than from a size chart.

Every PowerBass Model We Build For

37 PowerBass models, each with its own cabinets. Ported tunings are the frequency each box is tuned to.

8 inch

S-84: sealed wide wedge in triple and quad; ported wedge in single at 35 Hz. XL-844: sealed wedge in dual.

10 inch

2XL-1040D: sealed wedge in single and dual. L-1004D: sealed wide wedge in triple and quad; ported wedge in single at 34.5 Hz. M-1004: sealed wide wedge in triple and quad; ported wedge in single at 33.5 Hz. M-1004D: sealed wide wedge in triple and quad; ported wedge in single at 33.5 Hz. S-10T: sealed wide wedge in triple and quad; ported wedge in single at 35.5 Hz. S-10TD: sealed wide wedge in triple; ported wedge in single at 35.5 Hz. S-1004: sealed wide wedge in triple and quad; ported wedge in single at 33 Hz. S-1004D: sealed wide wedge in triple and quad; ported wedge in single at 32.5 Hz. XL-104MF: ported wedge in single at 35 Hz. XL-1004D: sealed wide wedge in triple and quad; ported wedge in single at 34 Hz. XL-1040: sealed wide wedge in triple and quad; ported wedge in single at 34 Hz. XL-1040D: sealed wide wedge in triple and quad; ported wedge in single at 34 Hz. XL-1040T: sealed wide wedge in triple and quad; sealed wide down-fire in single and dual; sealed down-fire in single and dual; ported wedge in single at 37 Hz. XL-1044: sealed wide wedge in triple and quad; sealed wedge in single and dual; ported wedge in single at 34 Hz.

12 inch

2XL-1204D: sealed wide wedge in triple; ported wedge in single at 32.5 Hz. 2XL-1240D: sealed wide wedge in triple; sealed wedge in single and dual; ported wedge in single at 35 Hz. L-1204D: sealed wide wedge in triple; ported wedge in single at 32 Hz. M-1204: sealed wide wedge in triple; ported wedge in single at 32.5 Hz. M-1204D: sealed wide wedge in triple; ported wedge in single at 31.5 Hz. S-12T: sealed wide wedge in triple; ported wedge in single at 33.5 Hz. S-12TD: ported wedge in single at 35 Hz. S-1204: sealed wide wedge in triple; ported wedge in single at 33 Hz. S-1204D: sealed wide wedge in triple; ported wedge in single at 32.5 Hz. XL-124MF: ported wedge in single at 32.5 Hz. XL-1204D: ported wedge in single at 33 Hz. XL-1240: ported wedge in single at 34 Hz. XL-1240D: ported wedge in single at 33 Hz. XL-1240T: sealed wide wedge in triple; sealed wide down-fire in single and dual; sealed down-fire in single and dual; ported wedge in single at 33.5 Hz. XL-1244: sealed wide wedge in triple; sealed wedge in single and dual; ported wedge in single at 32.5 Hz.

15 inch

3XL-1501D: ported wedge in single at 32.5 Hz. 3XL-1502D: ported wedge in single at 32 Hz. 3XL-1510D: sealed wedge in single. L-1504D: ported wedge in single at 31 Hz. M-1504: ported wedge in single at 28 Hz. M-1504D: ported wedge in single at 28 Hz.

How to Choose

Shape first, and let the car decide it

If a conventional enclosure fits, take a wedge. The conventional-depth drivers reach lower and sit in a better damped alignment. Down-fire is the answer when height is the constraint, not the preference.

Then sealed or ported

Sealed is the default for accuracy in the least space and forgives imperfect placement. The ported wedge is for output: more of it around the tuning frequency, from a larger cabinet. Both are solved for the specific PowerBass driver, and the listing states which alignment it is.

Then pick the driver by extension, not diameter

F3 across the sealed wedges runs 46.1 to 62.3 Hz. The XL-1244 and the 3XL-1510D are the two that reach lowest. The XL-844 and 2XL-1240D are the two that do not, for opposite reasons: the 844 is an eight, and the 2XL-1240D has a Qts better suited to a ported box.

Single or dual is about output, not character

Each chamber in a dual is cut to the same volume the single delivers, so the alignment is identical. What changes is output, cabinet size and the load your amplifier sees.

Then source the driver

We do not stock PowerBass drivers. Every cabinet is cut for a subwoofer you already own or buy elsewhere.

Measuring for One

Down fire: measure height

Installed height is what matters, not cabinet height, because these stand on a 1.75 inch standoff. They also want a hard flat floor beneath them: thick carpet, a spare wheel well or a storage lid all change what the driver loads into.

Wedge: measure the trunk floor

A wedge is deepest at its base, and that base dimension is what has to clear on the trunk floor. Widths run from 19.77 inches on the single 12 up to 32 inches on the duals. Each listing states both depths and the width.

Then confirm the model

Cutout and mounting depth are cut to one specific driver. A shallow mount XL-T and a conventional XL of the same diameter share neither.

A Bigger Cone Is Not a Lower Box

Half power across the sealed cabinets runs from 46.1 Hz to 62.3 Hz, and the two sealed 12 inch wedges sit at opposite ends of that. The XL-1244 reaches 46.2. The 2XL-1240D reaches 62.3, because its Qts of 0.334 is past the knee for sealed loading. Both are correct for their driver. Read the alignment on the listing before you shop on diameter.

Cut to PowerBass Published Data

Airspace comes from the recommended enclosure tables in PowerBass owner's manuals. Cutout, mounting depth and frame diameter come from their cutout templates. Alignment is computed from their published Thiele-Small parameters, and on every 2XL and 3XL model our figures land within 0.02 on Qtc of what PowerBass prints themselves.

Wedge or Down Fire

The sealed wedges lean against the rear seat back and fire into the trunk. They take conventional depth drivers, hold 0.50 to 2.25 cubic feet per chamber and land between Qtc 0.60 and 0.71, which is a properly damped sealed alignment.

The down-fire cabinets exist for a different problem. A shallow mount driver is bought when a normal box will not fit, so these fire at the floor from a 1.75 inch standoff and occupy 6.65 to 9.03 inches of height. The airspace PowerBass specifies for those drivers is small, so the alignment is firmer by necessity.

The ported wedges are the third option. Cut for the L, M, S, XL, 2XL and 3XL lines in 8, 10, 12 and 15 inch, each carries a triangular corner slot port solved from that driver's published parameters, with the tuning frequency and net volume stated on the listing. They ship without polyfill, because fill would move the tuning.

Every cabinet is Performance Optimized. The sealed builds use the airspace PowerBass publishes for the driver, and each product page states its net volume, alignment and external dimensions.

PowerBass Subwoofer Box Questions

Which PowerBass subwoofers do these boxes fit?

Each cabinet is cut for one specific model, and the product title names it. The sealed wedges cover the XL-844, XL-1044, XL-1244, 2XL-1040D, 2XL-1240D and 3XL-1510D, and the sealed down-fire boxes the shallow mount XL-1040T and XL-1240T. The ported wedges cover the S, M, L, XL, 2XL and 3XL lines from 8 to 15 inch, with the model on every listing. Match the model, not the diameter: a shallow mount 10 and a conventional 10 share neither cutout nor mounting depth nor recommended volume.

Should I choose a wedge or a down-fire box?

The vehicle decides. A down-fire cabinet fires at the floor and stands 1.75 inches off it, so installed height runs 6.65 to 9.03 inches and it goes under or behind a seat. A wedge leans against the rear seat back and fires into the trunk, so it needs floor space rather than headroom. If a conventional box fits your trunk, the wedges use better drivers and reach lower.

Why do two 12 inch boxes have such different low-end?

Because the drivers are different. The XL-1244 reaches 46.2 Hz and the 2XL-1240D reaches 62.3 Hz, both anechoic, both in the airspace PowerBass specifies. The 2XL-1240D has a Qts of 0.334, which puts it past the knee for sealed loading, and no sealed cabinet takes it much below 61 Hz. It is the better driver on paper and the worse one in a sealed box. If low extension is the goal, the XL-1244 is the 12 to buy.

Why are the down-fire boxes a higher Qtc than the wedges?

Not by choice. A shallow mount driver exists for installs with no room, and PowerBass specifies 0.30 to 0.40 cubic feet for the XL-T models. That little air produces a firm alignment, Qtc 0.91 on the ten and 1.15 on the twelve. Firing down at a hard floor close to a boundary is what recovers some of the low end in the vehicle.

Do you sell PowerBass subwoofers?

No. We build the enclosure and you source the driver. The sealed cabinets are cut to the airspace PowerBass publishes for its own model and the ported ones to its published parameters, so they suit a subwoofer you already own or buy elsewhere.

What impedance will I see?

It depends on the driver. The XL-844, XL-1044 and XL-1244 are single 4 ohm voice coils, so a single is 4 ohms and a pair is 2 ohms in parallel. The 2XL models are dual 4 ohm. The 3XL-1510D is dual 1 ohm, which parallels to 0.5 ohms, so series 2 ohm wiring is the default answer on that one. Each product page states its own options.

Are these sealed or ported, and do they ship with polyfill?

Both. The sealed wedges and down-fire cabinets ship with polyfill already installed as a light lining; it damps the inside of the box and is part of how each cabinet was specified, so do not add or remove it. The ported wedges are solved from each driver's published parameters with a triangular corner slot port and the tuning stated on the listing, and they ship without polyfill because fill would move the tuning.

Subwoofer Boxes by Brand

Every box is cut to one driver's published specs. Pick the brand your subwoofer comes from.

Proline X

Proline X Performance Wedge P10-WS III Sealed Enclosure for 10" Subwoofers

$ 159.99 $ 179.99

Proline X

Proline X Performance Wedge P12-WS III Sealed Enclosure for 12" Subwoofers

$ 169.99 $ 179.99

Proline X

Proline X Performance Wedge P12-WDS III Sealed Enclosure for Dual 12" Subwoofers

$ 229.99

Proline X

PowerBass XL-844 Dual Box: Sealed 8" Wedge Enclosure

$ 249.99

Proline X

Proline X P10-S DF | Single 10" Sealed Down Fire Subwoofer Enclosure

$ 169.99

Proline X

Proline X P12-S DF | Single 12" Sealed Down Fire Subwoofer Enclosure

$ 179.99

Proline X

Prodigy NB3-10 Box: Sealed 10" Shallow Down Fire Enclosure

$ 259.99

A dark gray rectangular audio speaker enclosure shown on a dark promotional graphic with dimension labels reading 30 inches wide and 7 inches high, plus text including 'PROLINE' and 'PO 10-S DF T1'.

Proline X

Rockford Fosgate T1 Slim Box: Sealed 10" Shallow Down Fire Enclosure

$ 259.99

Rainbow

Rainbow Audio Dream 0.5K Mono Class D Amplifier

$ 89.99 $ 399.99

US Acoustics

US Acoustics Lisa | 4 Channel Class AB Amplifier | 4 x 50w

$ 159.99

US Acoustics

US Acoustics Wendy | 2 Channel Class AB Amplifier | 2 x 75w

$ 159.99

Prodigy Audio

Prodigy Audio 600 Watt 4 Channel Amplifier | NBM100.4

$ 225.99 $ 270.99

Last updated October 10, 2026

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PowerBass Subwoofer Boxes and Enclosures

Two Shapes, and the Vehicle Picks

Then the Driver Picks How Low It Goes

Then the Ported Wedges

PowerBass Subwoofer Box Directory by Model

Cut Per Driver, Not Per Diameter

Every PowerBass Model We Build For

8 inch

10 inch

12 inch

15 inch

How to Choose

Shape first, and let the car decide it

Then sealed or ported

Then pick the driver by extension, not diameter

Single or dual is about output, not character

Then source the driver

Measuring for One

Down fire: measure height

Wedge: measure the trunk floor

Then confirm the model

Wedge or Down Fire

Categories

PowerBass Subwoofer Box Questions

Which PowerBass subwoofers do these boxes fit?

Should I choose a wedge or a down-fire box?

Why do two 12 inch boxes have such different low-end?

Why are the down-fire boxes a higher Qtc than the wedges?

Do you sell PowerBass subwoofers?

What impedance will I see?

Are these sealed or ported, and do they ship with polyfill?

Subwoofer Boxes by Brand

Pairs Well With This Collection

Proline X Performance Wedge P10-WS III Sealed Enclosure for 10" Subwoofers

Proline X Performance Wedge P12-WS III Sealed Enclosure for 12" Subwoofers

Proline X Performance Wedge P12-WDS III Sealed Enclosure for Dual 12" Subwoofers

PowerBass XL-844 Dual Box: Sealed 8" Wedge Enclosure

Pairs Well With This Collection

Proline X P10-S DF | Single 10" Sealed Down Fire Subwoofer Enclosure

Proline X P12-S DF | Single 12" Sealed Down Fire Subwoofer Enclosure

Prodigy NB3-10 Box: Sealed 10" Shallow Down Fire Enclosure

Rockford Fosgate T1 Slim Box: Sealed 10" Shallow Down Fire Enclosure

Power for Your Subwoofer System

Rainbow Audio Dream 0.5K Mono Class D Amplifier

US Acoustics Lisa | 4 Channel Class AB Amplifier | 4 x 50w

US Acoustics Wendy | 2 Channel Class AB Amplifier | 2 x 75w

Prodigy Audio 600 Watt 4 Channel Amplifier | NBM100.4

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