Sealed or Ported Truck Subwoofer box?We pick PORTED!

Ported Truck Subwoofer Boxes: Unleashing Maximum Output

The Science and Benefits of Ported Enclosures

Ported (vented) subwoofer boxes are engineered to deliver louder, deeper bass by allowing air to move in and out through a tuned port. This design increases efficiency and output, making it a favorite among bass enthusiasts and SPL competitors.

Key benefits of ported boxes:

• Enhanced bass response: Louder and deeper low frequencies compared to sealed boxes

• Greater efficiency: Requires less amplifier power for the same output

• Custom tuning: Port length and diameter can be optimized for your subwoofer and musical preferences

CustomLowZ specializes in precision-tuned ported enclosures, with options for under-seat, behind-seat, and custom-fit applications. Each box is designed to match your subwoofer’s Thiele/Small parameters, ensuring optimal performance.

Ported Box Examples and Tuning

• Ford F-150 SuperCrew (4) 8s Underseat Box: 2.8 cu ft after displacement, tuned at 34 Hz for low-end performance—even with smaller woofers

• Flat-pack ported kits: Available for a wide range of sub sizes and truck models, with user-selectable port styles and tuning frequencies

“The ported design really allows the Skar EVL 15s to perform at their best, delivering incredible low-end response and overall sound quality. Custom Lows has clearly put a lot of thought and expertise into these plans, making them accessible and reliable for anyone looking to build their own enclosure.”

— Brandon Francione, review of 3 Skar EVL 15s ported enclosure

Performance Tuning and SPL

CustomLowZ’s ported boxes are typically tuned between 30–35 Hz for a balance of sound quality (SQ) and sound pressure level (SPL), but can be customized for higher SPL or lower extension as desired. The company’s expertise in port design—whether slot, round, or kerf—ensures minimal turbulence and maximum output.