Dual Sundown Audio SA Classic 12" Custom Subwoofer Enclosure – High-Performance SPL Box

Bring out the best in your dual Sundown Audio SA Classic 12" subwoofers with this handcrafted, precision-tuned enclosure from Basshead Supply. Engineered for deep, controlled bass and extreme durability, this custom dual 12" box is ideal for daily drivers and SPL setups alike.

Performance Specifications – Dual 12" Subwoofer Box

• Net Internal Volume: 3.5 cubic feet
• Tuning Frequency: 33 Hz
• Port Area: 50.625 square inches
• Port Dimensions: 13.5″ x 3.875″ slot port
• Subwoofer Cutout Diameter: 11.01″
• Power Handling: Up to 4000W RMS (dual SA Classic 12s)

Premium Build Quality & Features

• Material: 3/4” (18mm) Russian Baltic Birch plywood
• Front Baffle: Solid 1” (24mm) – 17-ply veneer for strength and clarity
• Reinforcement: 3/4″ (18mm) internal center baffle brace
• Finish: Carbon gray stain with protective polyurethane topcoat
• Construction: Screwless exterior assembled with Titebond III glue for a clean, seamless look
• Pre-Wiring: 10-gauge OFC speaker wire and recessed satin nickel brass binding posts

Enclosure Dimensions

• Height: 15″
• Width: 33.75″
• Depth: 20″

Made-to-Order – Lead Time & Policy

Lead Time: 2–3 weeks for handcrafted completion
Refund Policy: No refunds after the enclosure has entered the cut-out phase (custom-built item)

Made in the USA – Basshead Supply Branded Series 🇺🇸

Part of our signature “Branded Series,” this dual SA Classic 12" subwoofer enclosure is proudly built by hand in the United States. Every unit is crafted with care and precision, offering premium strength and resonance control to ensure maximum output and clarity.

Unlike generic prefab boxes, this enclosure features invisible screw construction, dense birch wood panels, and a unique carbon gray stain finish—built not just to perform, but to impress.

Whether you're powering daily bass or hitting the lanes with an SPL rig, this dual 12" Sundown Audio SA Classic enclosure provides the ideal balance of output, efficiency, and rugged design.

Order today and experience subwoofer performance done right—custom-built, pre-wired, and ready to bring the bass.