Dual Sundown Audio SA Classic 12" Custom Subwoofer Enclosure – Premium Handcrafted Bass Box

Maximize your bass output with this custom enclosure built specifically for dual Sundown Audio SA Classic 12″ subwoofers. Crafted with precision by Basshead Supply, this box is engineered for power, clarity, and long-term performance—perfect for both daily drivers and competition-level systems.

High-Performance Specifications

• Net Internal Volume: 3.5 cubic feet
• Tuning Frequency: 33 Hz
• Port Area: 50.625 square inches
• Port Dimensions: 13.5″ x 3.875″
• Subwoofer Cutout Size: 11.01″
• Power Handling: Up to 4000W RMS (dual subwoofers)

Premium Materials & Construction

• Constructed with 3/4” (18mm) Russian Baltic Birch plywood
• Solid 1” (24mm) front baffle – 17-ply veneer for extreme rigidity
• 3/4” (18mm) center baffle brace for added structural support
• Screwless exterior – seamless, clean design
• Glued with high-strength Titebond III wood adhesive
• Carbon gray stain with durable polyurethane finish

Installation Dimensions

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

Ready to Play – Prewired & Professionally Finished

• Pre-wired with 10-gauge OFC speaker wire
• Recessed satin nickel brass binding posts installed
• Directly compatible with dual 12" SA Classic subwoofers by Sundown Audio

Important Ordering Information

Build Time: 2–3 weeks
No refunds once enclosure production begins (after cut-out stage)

Handcrafted in the USA Basshead Supply “Branded Series”

This dual 12" custom subwoofer enclosure is part of our exclusive “Branded Series,” designed to provide subwoofer-specific enclosures that combine elite audio performance, superior materials, and standout aesthetics—without the high-end price tag.

Every box is hand-built in the United States with pride and passion. No visible screws. No shortcuts. Just pure performance, ready to unleash up to 4000W RMS of clean, hard-hitting bass.

Upgrade your sound with a custom enclosure that’s engineered for the Sundown SA Classic 12s—because your subs deserve better than prefab.