Rear-Loaded Horn Enclosure for Single 6.5″ Driver (Digital Plan) – 30Hz Tuning

This Rear-Loaded Horn enclosure is purpose-built for extreme efficiency and competition-level SPL performance from a single 6.5-inch subwoofer. Designed around the CT Sounds MESO 6.5 or similar high-power, long-excursion drivers, this enclosure proves that small drivers can deliver serious output when paired with the right horn design.

Horn-loaded enclosures dramatically increase acoustic efficiency by converting cone movement into controlled, high-pressure output. Compared to traditional sealed or ported designs, this enclosure allows the subwoofer to play significantly louder with less power—making it ideal for SPL competition, demo vehicles, and advanced bass builds.

Tuned to 30Hz, this design focuses on strong low-frequency output and aggressive projection. When tested, this enclosure has been proven to achieve an SPL score of 133 dB at 37Hz, demonstrating its real-world performance capability.

External Dimensions

L × W × H: 31 in × 40 in × 7 ½ in

Horn Geometry Specifications

This enclosure features a precision-designed horn path optimized for efficiency, airflow, and SPL performance:

• Throat: 6 inches

• Neck: 119 ½ inches (horn path transition section)

• Mouth: 12 inches

These dimensions are carefully calculated to support proper horn expansion, minimize losses, and maximize output within the intended frequency range.

Competition-Focused Performance

• Rear-loaded horn architecture for superior efficiency

• Proven 133 dB @ 37Hz SPL performance

• Optimized for high-power 6.5″ subwoofers

• Ideal for competition and aggressive demo use

This is not a traditional daily-driver enclosure. It is designed for builders who prioritize output, efficiency, and measurable SPL results.

⚠️ Competition Use Only

This horn enclosure is intended for competition and demo applications. Proper amplifier tuning, filtering, and gain control are required. Continuous high-volume playback or improper setup may result in subwoofer damage. Recommended for experienced builders familiar with horn-loaded systems.

Digital Plan Includes

• Complete cut sheets and panel dimensions

• Full horn path layout

• Throat, neck, and mouth measurements

• Tuning and design specifications

• 3D reference views for accurate construction

This digital plan is ideal for competitors and advanced builders looking to extract maximum SPL performance from a compact 6.5-inch driver using proven horn-loaded design principles.