What makes the Performance Wedge Series different from standard boxes?

These enclosures use an angled back panel to better fit against the rear seat in trunks. They're easier to install and reduce wasted space.

Can I choose the finish?

Yes. Each Performance Wedge box is available in either plush black carpet or charcoal trunkliner finish.

Is the enclosure pre-wired?

Yes. Each model includes 12-gauge oxygen-free copper (OFC) speaker wire, pre-installed from the woofer terminal to the binding posts.

What subwoofers fit in these enclosures?

We offer single, dual, and triple setups for 8", 10", 12", and 15" woofers. Exact fitment will vary by model and mounting depth — check product specs for details.

Are these boxes sealed or ported?

Both sealed and ported options are available, depending on the specific model. Each listing includes full tuning specs and airspace details.

Subwoofer enclosure banner image with sub enclosures from proline x

Proline-X Performance Wedge Series Enclosures

Performance Wedge Series Enclosures are designed with an angled profile to fit tightly against rear seats and vehicle walls while delivering clean and controlled bass output. The wedge shape allows these enclosures to sit flush in cars, trucks, and SUVs where straight-wall boxes may waste space or interfere with seat positioning. Each enclosure is engineered with proper internal airspace and rigid construction to support consistent low-frequency performance. The Performance Wedge Series focuses on efficient use of space without sacrificing sound quality or output. These enclosures work well with a wide range of subwoofers and amplifier power levels, making them suitable for daily driving systems and performance-oriented upgrades. This collection highlights wedge-style enclosures built for reliable fitment, clean bass response, and long-term durability. If you want strong bass performance with a box that fits cleanly into tight vehicle layouts, the Performance Wedge Series offers a practical and performance-focused solution.

Tuning Frequency 36Hz (Angled)

Material High-Density MDF

Power Rating High Output

Ideal For Truck / Hatchback

Proline X P12-WS III-G

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

$ 159.99 $ 179.99 11% OFF

In stock and ready to ship!

Performance Optimized Wedge Style Ported 10 inch Subwoofer Enclosure | Prodigy NB2 10 - Proline X Subwoofer Enclosures for car audio systems

Proline X POW 10-P NB2

Proline X Single 10" Ported System | Loaded with Prodigy NB2

$ 289.99 $ 319.99 9% OFF

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.

Performance Wedge Series Enclosures Designed for Angled Fitment and Clean Bass

Angled Wedge Design for Better Vehicle Fitment

The wedge shape allows the enclosure to sit flush against rear seats. It follows the angle of seat backs. This improves fitment in tight spaces. It reduces wasted space. Installation stays clean and secure.

Efficient Use of Cargo and Cabin Space

Performance Wedge enclosures are designed to save space. They fit close to vehicle walls. Cargo room remains usable. Seating position is not affected. The layout stays practical.

Clean and Controlled Bass Output

Each enclosure is built with proper internal volume. Subwoofer movement stays controlled. Bass response remains tight. Distortion is reduced at normal listening levels. Performance stays consistent.

Designed for Daily Driving Systems

These enclosures are built for real vehicle use. They handle vibration and movement. Construction focuses on durability. Output remains stable during long listening sessions. Reliability is maintained over time.

Compatible With Many Subwoofer Options

The Performance Wedge Series supports a wide range of subwoofers. It works with common mounting depths. It pairs well with moderate to higher amplifier power. System planning stays flexible. Fitment remains predictable.

A Balanced Upgrade for Space and Performance

The Performance Wedge Series offers a clear improvement over basic box designs. It combines efficient fitment with clean bass output. It suits daily drivers and upgraded systems. It maintains Proline-X build standards. It delivers dependable performance in a compact form.