What's the difference between Professional and Performance Optimized?

Both are driver-matched. The Professional Series adds double-layer baffle construction (minimum), threaded inserts matched to each driver manufacturer's bolt pattern, polyfill, and 12 gauge OFC pre-wiring landed at the composite terminal cup. The Performance Optimized series uses single-baffle construction and ships without polyfill, prewiring, or feet for installer customization. Professional is the right choice when the build is competition-grade or when the driver demands the structural support of double-baffle construction.

Why double-layer baffles?

The baffle holds the driver. On a high-output build, it's the panel under the most direct mechanical stress. Single-baffle construction eventually flexes under sustained high excursion, which alters the driver's effective mounting and changes its acoustic behavior. Double-layer baffle construction holds dimension under sustained competition-level output. For a JL Audio W7 or Image Dynamics IDMAX in a serious build, this isn't optional.

Can I use Professional Series enclosures with drivers you don't carry?

Yes. The Professional Series fits the Kicker Solo X line as standard, and we build enclosures for owner-supplied drivers from Skar, Sundown, Digital Design, and Ground Zero on a fitment service basis. The threaded inserts are pre-positioned for the manufacturer's bolt pattern, the cabinet is calculated to the driver's Thiele-Small parameters, and the build supports the install regardless of where the driver was purchased.

What threaded insert spec is used?

Stainless 8/32 threaded inserts pressed into the baffle, matched to each manufacturer's bolt pattern. Some drivers use 8/32, some use other sizes; the inserts in each enclosure are sized to the labeled driver's spec. Driver mounting uses standard machine screws (not supplied; use the spec from the driver manufacturer).

Why include polyfill?

Polyfill is included in sealed Professional Series enclosures because in a sealed alignment, polyfill works with the tuning. It reduces standing wave reflections inside the cabinet and effectively increases the apparent internal volume, giving the driver a slightly larger acoustic environment than the cabinet's physical dimensions. The polyfill quantity in each enclosure is sized to the specific cabinet volume.

What size amplifier do I need?

Match your amplifier's RMS output at your wired impedance to the driver's RMS rating. The Professional Series enclosure doesn't change the power requirement. JL Audio W7 drivers run 750 to 1500W RMS depending on size. Image Dynamics IDMAX drivers run 1000W RMS. Kicker Solo X drivers run 1000 to 2000W RMS. Audiomobile Encore drivers run 1000W RMS. Match the amplifier to the driver's RMS rating at the final wired impedance. Most Professional Series builds run on a high-current monoblock amplifier.

Subwoofer enclosure banner image with sub enclosures from proline x

Proline X - Professional Series Subwoofer Enclosures

Tuning Frequency 28Hz - 34Hz

Material Double Stack Baffle

Power Rating 1000W+ RMS

Ideal For Competition / SQ

Best Pro for JL Audio W7

Professional Series Enclosure JL Audio 13w7 Ported Box

Proline X

Proline X Enclosure | Professional Series | Fits JL Audio 12w7 Subwoofer

Built for the JL Audio 12W7. Double-layer baffle, threaded inserts matched to W7 bolt pattern, calculated for W7 Thiele-Small parameters.

$ 479.99

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Best Pro for Image Dynamics IDMAX

Car audio subwoofer enclosure with American flag design on a white background

Proline X

Proline X | Image Dynamics IDMAX 12 Sealed Subwoofer Enclosure | Professional Series

Sealed Professional Series for the Image Dynamics IDMAX 12. SQL-grade build with double-baffle construction and threaded inserts.

$ 299.99

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Best Pro for Kicker Solo X

Proline X

Proline X Enclosure | X Series | Fits Kicker Solo X 12" Subwoofer

Fits the Kicker Solo X 12. Driver not sold here, but the enclosure is built to Solo X parameters with double-baffle support for the driver's high-excursion behavior.

$ 749.99

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Best Pro Compact

Professional Series 6.5 inch Subwoofer Box

Proline X

Professional Series 6.5 inch Subwoofer Ported Box

Ported 6.5 inch Professional Series enclosure for compact builds where output and footprint both matter.

$ 199.99

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Shop the Lineup

Proline X Pro KIK 12 S

Proline X Enclosure | X Series | Fits Kicker Solo X 12" Subwoofer

$ 749.99

In stock and ready to ship!

Proline X Enclosure X Series Fits Kicker Solo X 8-inch Subwoofer Dual - Proline X Subwoofer Enclosures for car audio systems

Proline X Pro KIK 10D

Proline X Enclosure | X Series | Fits Kicker Solo X 10" Subwoofer | Dual

$ 749.99

In stock and ready to ship!

Proline X Enclosure Professional Series Fits Prodigy 15-inch NB5 - Proline X Subwoofer Enclosures for car audio systems

Proline X Pro Prodigy

Proline X Enclosure | Professional Series | Fits Prodigy 15" NB5

$ 1,199.99

In stock and ready to ship!

Proline X Pro KIK 15 X

Proline X Enclosure | X Series | Fits Kicker Solo X 15" Subwoofer

$ 999.99

In stock and ready to ship!

Proline X Enclosure X Series Fits Dual Kicker Solo X 12-inch Subwoofer - Proline X Subwoofer Enclosures for car audio systems

Proline X Pro KIK 12D

Proline X Enclosure | X Series | Fits Dual Kicker Solo X 12" Subwoofer

$ 1,299.99

In stock and ready to ship!

Proline X Pro KIK 15D

Proline X Enclosure | X Series | Fits Kicker Solo X 15" Subwoofer | Dual

$ 1,750.00

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Built Different. Built Better.

Every Proline X enclosure is manufactured in our Tullahoma, Tennessee facility using materials and construction methods that most enclosure brands don't touch.