Custom Enclosure for Sundown Audio 12" SA Classic Subwoofer – Handcrafted SPL Performance Box

Unlock the full potential of your Sundown Audio 12” SA Classic subwoofer with this precision-built custom enclosure from Basshead Supply. Designed specifically for the SA Classic 12", this box is tuned for deep, powerful bass and built with premium-grade materials to ensure unmatched durability and sound quality.

Performance Specifications

• Net Internal Volume: 1.75 cubic feet
• Tuning Frequency: 33 Hz
• Port Area: 25.3125 square inches
• Port Dimensions: 13.5″ x 1.875″
• Subwoofer Cutout Size: 11.01″
• Power Handling (Single): Up to 2000W RMS

Premium Construction Features

• 3/4” (18mm) Russian Baltic Birch Plywood
• Solid 1” (24mm) baffle – 17-ply birch veneer
• Invisible screwless design – ultra-clean exterior
• Assembled using industrial-grade Titebond III wood glue
• Reinforced with internal bracing for max strength
• Carbon gray stained finish with polyurethane topcoat

Design Dimensions

• Height: 15″
• Width: 21.71″
• Depth: 17″

Plug-and-Play Ready

• Pre-installed satin nickel brass binding posts
• Prewired with 10-gauge OFC speaker wire
• Compatible only with Sundown Audio 12" SA Classic Subwoofer

Important Notes

Lead Time: 2–3 weeks (made to order)
No refunds after enclosure production begins (cut-out stage)

Built with Passion in the USA 🇺🇸

At Basshead Supply, our goal with the “Branded Series” is to create subwoofer-specific enclosures that combine precision tuning, rugged construction, and head-turning aesthetics—all at a competitive price. Every enclosure is handcrafted in the United States by passionate audio enthusiasts who know what bass lovers need: power, precision, and pride.

Whether you're looking to dominate SPL lanes or simply get the most out of your Sundown setup, this custom 12" subwoofer box is the perfect foundation for your build.