Custom Enclosure for Sundown Audio Xv3 12" Subwoofer – 2.5 ft³ Ported Box for Maximum Bass

Unlock the full potential of your Sundown Audio Xv3 12" subwoofer with this precision-engineered, handcrafted enclosure by Basshead Supply. Built for extreme output and smooth, low-frequency response, this box is tuned, braced, and finished to elevate your subwoofer’s performance and appearance.

Performance Specifications – Xv3 12" Subwoofer Box

• Net Internal Volume: 2.5 cubic feet
• Tuning Frequency: 31 Hz – ideal for deep musical bass with daily drivability
• Port Area: 35 square inches
• Port Dimensions: 14″ x 2.5″
• Subwoofer Cutout Diameter: 11.01″
• Power Handling: Built to support high-power setups (2000W RMS+)

Construction Quality & Premium Materials

• Material: Full 1" thick Russian Baltic Birch plywood
• Build: 17-ply birch veneer throughout – no MDF
• Finish: Carbon gray stain with a durable polyurethane protective topcoat
• Assembly: Seamless screwless exterior assembled using industrial-strength Titebond III glue
• Wiring: Prewired with 10-gauge OFC speaker wire
• Terminals: Recessed satin nickel brass binding posts

External Dimensions

• Height: 16″
• Width: 27.375″
• Depth: 19″

Custom Built-to-Order – Production Time & Policy

Lead Time: 2–3 weeks from order date
Returns: No refunds once enclosure enters the cut-out phase (made-to-order item)

Handcrafted in the USA – Basshead Supply Branded Series 🇺🇸

This custom 12" enclosure for the Sundown Audio Xv3 subwoofer is part of the Basshead Supply “Branded Series,” created for enthusiasts who demand the best in enclosure design, durability, and audio performance. Proudly made in the United States, each box is built with attention to detail and expert craftsmanship.

From the full 1" birch construction to the clean screwless finish and heavy-duty bracing, this box stands above prefab alternatives. Whether you're building a daily system or pushing SPL limits, this enclosure delivers clean output and long-lasting strength.

Order today and experience the clarity, power, and punch that only a properly tuned enclosure can bring to your Sundown Xv3 12" setup.