Single 15″ Subwoofer Enclosure – Vented 31Hz (Digital Plan)

This Single 15-Inch Vented Subwoofer Enclosure is engineered for powerful, efficient bass with the ability to deliver competition-level output while remaining fully suitable for daily listening. Designed specifically for the Memphis MOJO15 or similar high-power 15-inch subwoofers, this enclosure balances deep low-frequency extension with aggressive SPL capability.

Tuned to 31Hz, the enclosure provides strong low-end authority with clean, controlled output across the musical bass range. When paired with proper amplification and tuning, this design is capable of producing 140+ decibel output while handling 2,000+ watts of input power, making it ideal for loud daily systems, demos, and weekend competition setups.

Internal Volume & Structural Design

• Net Internal Volume: 6.25 cubic feet (before displacement)

• Designed to maintain optimal airspace after subwoofer, port, and bracing displacement

• Optimized for high-efficiency airflow and stable pressure loading

To control enclosure flex and maintain acoustic accuracy under extreme output, this design incorporates dual window bracing that runs from the top panel to the bottom panel, providing vertical structural support throughout the enclosure. This bracing system dramatically reduces panel flex, improves efficiency, and helps preserve consistent output at high power levels.

External Dimensions

• Length: 18 ½ in

• Width: 45 in

• Height: 21 ½ in

These dimensions provide the internal volume and port area needed for efficient airflow, reduced distortion, and reliable performance under high power.

Performance-Driven Design

• Vented enclosure optimized for efficiency and output

• Tuned to 31Hz for deep, musical bass

• Dual top-to-bottom window bracing to prevent box flex

• Designed to support 140+ dB daily output

• Suitable for 2,000+ watts of input power

• Ideal for high-power 15″ subwoofers like the MOJO15

Unlike extreme competition-only enclosures, this design is intended to be daily-drivable, offering powerful bass without sacrificing musicality or long-term reliability when properly tuned.

Digital Plan Includes

• Complete cut sheets and dimensions

• Panel layout for ¾″ material

• Port specifications and tuning details

• Dual window bracing layout (top-to-bottom support)

• 3D reference views for easy assembly

This digital enclosure plan is ideal for builders and bass enthusiasts who want big-box output, strong efficiency, and real-world usability from a single 15-inch subwoofer.