Dual Sundown Audio Xv3 8" Custom Subwoofer Enclosure – High-Output Ported Box

Experience elite-level performance from your Sundown Audio Xv3 8" subwoofers with this purpose-built, handcrafted enclosure from Basshead Supply. This dual 8" subwoofer box is optimized for maximum output, precise tuning, and built-to-last quality using premium birch construction and a screwless, seamless design.

Performance Specifications – Dual Xv3 8" Subwoofer Enclosure

• Internal Volume: 2.0 cubic feet (net)
• Tuning Frequency: 34 Hz – tuned for deep, musical bass
• Port Area: 27.025 square inches
• Port Dimensions: 11.5″ x 2.35″
• Subwoofer Cutout Diameter: 7.36″ (per subwoofer)
• Power Handling: Built to support up to 2000W RMS (dual subs)

Construction Details & Build Features

• Material: 3/4” (18mm) premium Baltic Birch plywood
• Front Baffle: Solid 1” (24mm) 17-ply birch veneer baffle
• Bracing: Internal 18mm center baffle brace for added rigidity
• Finish: Carbon gray stain with durable polyurethane sealant
• Assembly: Fully glued (Titebond III) with zero visible screw holes for a seamless exterior
• Pre-Wiring: Pre-installed 10-gauge OFC wire and recessed satin nickel brass binding posts

Enclosure Dimensions

• Height: 13″
• Width: 18.5″
• Depth: 25.75″

Custom Built-to-Order – Lead Time & Return Policy

Production Time: 2–3 weeks from order date
Refunds: No refunds once your custom enclosure has been cut

Crafted in the USA – Basshead Supply Branded Series 🇺🇸

This dual 8-inch Sundown Xv3 enclosure is part of the Basshead Supply “Branded Series”—a line of subwoofer-specific enclosures designed to outperform prefab alternatives in every way. Built with precision, power, and pride in the United States, each box delivers premium craftsmanship and acoustic excellence.

From the rigid birch wood frame to the sleek gray-stained finish, this enclosure is built to stand out—and to stand up to serious bass. It’s the perfect match for your Sundown Xv3 8s, whether you're building a competition-ready setup or just want a clean daily ground-pounder that delivers every time.

Order yours today and take your build to the next level with a box that’s ready to perform, straight out of the package.