What does Micro Series mean and how is it different from a standard Proline X enclosure?

The Micro Series designation refers to a reduced external footprint compared to standard Proline X enclosures built for the same driver size. The internal volume is tuned to a sealed alignment, but the outer dimensions are optimized for installs where a full-depth box will not physically fit. Common use cases include narrow trunk floors, shallow under-seat spaces, and custom cavities with tight clearance requirements. Polyfill is included in each enclosure to acoustically offset the reduced internal volume.

Are these sealed or ported and what does the sealed alignment mean for bass output?

These are sealed Image Dynamics subwoofer enclosures — there is no port or vent in the cabinet. A sealed alignment produces tighter transient response and a more gradual low-frequency rolloff compared to ported designs, which makes them more predictable to tune with a DSP or amplifier crossover. The tradeoff is that sealed boxes generally require more amplifier power to match the SPL output of an equivalent ported enclosure. Polyfill is pre-loaded in each cabinet to increase effective acoustic volume and extend usable low-frequency output from the compact design.

Which Image Dynamics driver sizes and woofer configurations do these boxes support?

The Proline X Micro Series supports 8-inch, 10-inch, and 12-inch Image Dynamics subwoofers in both single and dual woofer configurations. The double mounting face accommodates all three driver diameters, and the recessed baffle keeps each driver flush regardless of size. Before selecting an enclosure, verify that your Image Dynamics driver's recommended sealed enclosure volume is compatible with the box's internal volume — mismatching Thiele-Small parameters to enclosure volume will affect frequency response and usable output. Dual configurations require two drivers of the same size and impedance.

Are mounting screws included and how does the threaded insert system work?

Yes — 8/32 machine screws are included with each enclosure. Woofer mounting uses these screws threaded into pre-installed inserts in the baffle, which is a more durable system than driving wood screws directly into MDF. Threaded inserts maintain consistent torque and do not degrade when a driver is removed and reinstalled, which matters for anyone upgrading drivers or adjusting configurations later. The recessed woofer cutout positions the driver flush with the baffle surface, keeping the surround clear of the cabinet edge during mounting.

What is Stack Fab construction and why is it used in the Proline X Micro Series?

Stack Fab is a method of building cabinet walls by stacking MDF layers and bonding them under pressure into a single dense panel. The resulting wall is more rigid than standard single-sheet MDF of the same nominal thickness, with fewer internal voids or inconsistencies. In a sealed subwoofer enclosure, rigid walls are essential — panel flex under driver excursion changes the effective internal volume and introduces unwanted resonance into the output. The Proline X Micro Series uses Stack Fab to maintain wall rigidity and dimensional accuracy within a compact cabinet envelope.

Subwoofer enclosure banner image with sub enclosures from proline x

Proline X Micro Series Subwoofer Boxes | Image Dynamics

The Proline X Micro Series sealed Image Dynamics subwoofer enclosures are built for vehicle installs where space is constrained but output requirements are not. These boxes use a reduced external footprint to fit locations where a standard-depth sealed enclosure will not clear — narrow trunk floors, under-seat cavities, and custom builds with strict dimensional limits.

Cabinets are constructed using Stack Fab — MDF layers bonded under pressure into a single dense wall panel that resists flex under sustained driver excursion. The double mounting face supports 8-inch, 10-inch, and 12-inch Image Dynamics subwoofers in single and dual configurations. The recessed woofer cutout keeps the driver flush with the baffle. Woofer mounting uses 8/32 machine screws into pre-installed threaded inserts, which are included. The in-house Advanced Terminal Cup is built from ABS and carbon fiber with stainless steel hardware and is prewired from the factory.

Each enclosure includes rubber feet and polyfill pre-loaded in the cabinet. No bench prep or internal wiring is needed before install.

Tuning Frequency Sealed / Tight

Material High-Density MDF

Power Rating Small Footprint

Ideal For Space Saving

←

→

All products loaded

}

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 sealed Image Dynamics subwoofer boxes compact footprint

What the Proline X Micro Series is

The Proline X Micro Series is a line of sealed subwoofer enclosures built around a reduced external footprint. They are designed for vehicle installs where depth or width clearance prevents a standard-sized box from fitting. Available for 8-inch, 10-inch, and 12-inch Image Dynamics subwoofers in single and dual configurations, the Micro Series covers a range of output targets within a smaller cabinet envelope. This is a space-specific solution within the Proline X lineup, not a reduction in build quality or acoustic standard.

Sealed enclosure alignment

These are sealed enclosures — the driver operates in a fully enclosed air volume with no port or vent. A sealed alignment produces controlled transient response and a gradual low-frequency rolloff that integrates predictably with most amplifier subwoofer channels. Each cabinet is pre-loaded with polyfill, which increases the effective acoustic volume and allows the compact enclosure to approach the performance of a larger sealed box. This is particularly relevant in the Micro Series where the external dimensions are reduced by design.

Stack Fab cabinet construction

Cabinet walls are built using Stack Fab construction — MDF layers stacked and bonded under pressure into a single dense panel. This produces consistent wall thickness and a rigid structure that resists panel flex under repeated driver excursion and sustained power. Panel flex in a sealed enclosure changes the effective internal volume and introduces resonance into the output. Stack Fab eliminates this variable and is used as the standard construction method across the Proline X lineup.

Driver sizing and woofer mounting

The double mounting face accepts 8-inch, 10-inch, and 12-inch Image Dynamics subwoofers in single and dual configurations. The recessed woofer cutout positions the driver flush with the baffle, protecting the surround during handling and reducing overall install depth. Mounting uses 8/32 machine screws into pre-installed threaded inserts — the screws are supplied. Threaded inserts hold torque consistently and allow the driver to be removed and reinstalled without stripping the mounting points, which is not possible with wood screws driven directly into MDF.

Terminal cup and factory wiring

Each enclosure uses the Proline X Advanced Terminal Cup, built in-house from ABS and carbon fiber with stainless steel hardware. Internal wiring from the terminal cup to the driver connection point is completed at the factory. This removes wiring as a variable at install and eliminates the need to work inside the cabinet after the driver is mounted. The stainless steel hardware resists corrosion across the temperature and humidity cycles common in vehicle environments.

Inclusions and install readiness

Each Proline X Micro Series enclosure ships with rubber feet, polyfill pre-loaded in the cabinet, prewiring from the terminal cup completed, and 8/32 machine screws for driver mounting. Rubber feet isolate the cabinet from the cargo floor and reduce vibration transfer. At install, mount the driver, connect the terminal cup, and secure the box — nothing else is required. This build-out standard is consistent across how Audio Intensity prepares the Proline X range for end users and installers.