What does Micro series mean for a subwoofer enclosure?

Micro series enclosures are built with a reduced external footprint compared to standard enclosures in the same product lineup. The cabinet dimensions are smaller to fit vehicles where space is a limiting factor. Internal volume is still tuned to support proper subwoofer operation, so the compact size does not indicate a compromise in acoustic design. The Proline X Micro Series maintains the same Stack Fab construction method used across the broader Proline X line.

What is the difference between the 10-inch and 12-inch enclosure options?

The 10-inch and 12-inch enclosures differ in internal volume, port tuning, and mounting cutout dimensions to match the respective Alpine driver sizes. A 10-inch Alpine subwoofer requires a smaller net internal volume than a 12-inch driver to reach its optimal operating range. Selecting the wrong enclosure size for your driver will affect frequency response and can place the driver outside its recommended Thiele-Small parameters. Always match the enclosure to the specific Alpine driver model you are installing.

Can I use this enclosure with a single or dual subwoofer setup?

These enclosures are available in both single and dual woofer configurations. The double mounting face supports one or two driver positions depending on the specific enclosure you select. Dual configurations wire the drivers either in series or parallel to match amplifier impedance requirements. Confirm your amplifier's stable impedance range before selecting a dual driver enclosure.

What is Stack Fab construction and why does it matter?

Stack Fab is a cabinet construction method where multiple layers of MDF are bonded together under pressure to form the enclosure walls. The resulting panels are denser and more resistant to flex than single-sheet MDF of the same thickness. In a subwoofer enclosure, cabinet rigidity directly affects how accurately the internal volume behaves — a cabinet that flexes changes its effective internal volume under pressure. Audio Intensity uses Stack Fab across the Proline X line to maintain consistent cabinet behavior at high output levels.

Does this enclosure come ready to install?

These enclosures ship with prewiring run from the terminal cup, polyfill installed, and rubber feet attached. The terminal cup uses an ABS and carbon fiber body with stainless steel hardware and is built in-house. Woofer mounting hardware is not included — standard screws are used and need to be sourced separately. The enclosure is otherwise ready for driver installation once you have the appropriate mounting screws.

Subwoofer enclosure banner image with sub enclosures from proline x

Proline X Micro Series Subwoofer Boxes | Alpine

The Proline X Micro Series subwoofer boxes are compact enclosures built specifically for Alpine 10-inch and 12-inch subwoofers. They address a common problem in car audio installations: finding a properly tuned, structurally sound enclosure that fits in space-constrained vehicles without requiring custom fabrication.

Each enclosure is constructed using Stack Fab — a method that bonds multiple layers of MDF under pressure to produce a dense, resonance-resistant cabinet. The double mounting face accommodates both single and dual woofer configurations, and the woofer cutout is recessed to allow flush driver installation.

The Advanced Terminal Cup is built in-house using an ABS and carbon fiber body with stainless steel hardware. Each box ships with prewiring run from the terminal cup, polyfill already installed, and rubber feet attached. Woofer mounting uses standard screws, which are not supplied.

These enclosures are suited for builders who need a verified fit for Alpine drivers in a reduced-footprint cabinet without sacrificing construction quality.

Tuning Frequency Sealed / Tight

Material High-Density MDF

Power Rating Small Footprint

Ideal For Space Saving

Black rectangular box with a round mirror on a white background

Proline X M10-S Alp

Proline X Micro Series 10" Sealed Enclosure - Fits Alpine RSW10

$ 249.99

In stock and ready to ship!

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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.

Langboard Elite MDF

48.5 lb/ft³ density and 200 psi internal bond strength, the highest-grade MDF available for enclosure construction.

1-Year Warranty

Full coverage on materials and construction defects. We stand behind every enclosure we build.

Driver-Matched Tuning

Internal volume, port tuning, and cabinet dimensions are spec'd to each driver diameter, not a universal fit applied across sizes.

Made in Tullahoma, TN

CNC-manufactured in our Tennessee facility on ShopSabre routers. Not imported. Not outsourced.

Proline X Micro Series subwoofer boxes built for Alpine fitment

What the Micro series is

The Proline X Micro Series is the compact tier of the Proline X lineup. These enclosures are built with a reduced external footprint, making them a practical option for vehicles where interior space is limited. The Micro designation indicates a smaller cabinet profile, not a reduction in construction quality. Internal volume and port tuning are maintained to support proper subwoofer operation.

Stack Fab cabinet construction

Each cabinet is built using the Stack Fab method — multiple layers of MDF bonded together under pressure. This process produces a cabinet wall that is denser and more uniform than standard single-sheet MDF construction. The result is a cabinet that resists flex and panel resonance under high excursion loads. Stack Fab construction also allows for tighter dimensional tolerances across the enclosure.

Double mounting face and recessed woofer

The double mounting face supports both single and dual woofer configurations in the same cabinet design. The woofer cutout is recessed, allowing the driver basket to sit flush with or below the mounting surface. This is relevant for installations where speaker grilles or tight clearances require a low-profile driver position. Standard screws are used for woofer mounting and are not included.

Advanced Terminal Cup

The terminal cup is built in-house and uses an ABS and carbon fiber body with stainless steel hardware. It is pre-wired from the terminal cup to the driver position, reducing installation time and the risk of wiring errors. The terminal cup design provides a secure connection point that holds up to repeated use and vibration. All wiring runs are completed before the enclosure ships.

Included accessories

Each enclosure ships with rubber feet, prewiring from the terminal cup, and polyfill already installed inside the cabinet. Rubber feet isolate the cabinet from the vehicle floor and reduce the transfer of vibration. Polyfill affects the acoustic behavior of the enclosure, helping the driver perform as though it is in a slightly larger space. These are included as part of the standard build.

Alpine driver fitment

These enclosures are built to accept Alpine 10-inch and 12-inch subwoofers. The mounting dimensions and internal volume are matched to Alpine driver specifications. Builders using Alpine subwoofers can install directly without modification to the mounting face. This collection does not support other driver brands or sizes outside of the stated Alpine fitment.