DC Audio Dual 15" XL SPL Ported Enclosure

The DC Audio Dual XL SPL 15" Ported Enclosure is a purpose-built, high-airspace enclosure designed specifically for the DC XL SPL 15" subwoofer. It delivers deep, controlled bass through an 8.5 cubic foot interior tuned to 31 Hz.

• Net Volume: 8.5 cubic feet — Provides the interior space needed for the XL SPL 15" in a ported design, supporting extended low-end output.
• Tuning: 31 Hz — Sets the enclosure’s low-frequency emphasis, helping bass extend deeper without sacrificing control.
• Port Area: 122.4 sq in — A larger port area helps maintain air movement at the tuned frequency, contributing to consistent bass response.
• Port Size: 20.0" x 6.12" — Dimensions engineered to achieve the 31 Hz tuning within the 8.5 ft³ volume.
• Cutout: 14.0" — The mounting hole size required for the driver insertion and secure fit.
• Construction: 1" (24mm) Russian Baltic Birch — 17-ply plywood provides rigidity and low enclosure flex for tight bass.
• Baffle: 1" front baffle — Thick, stiff front surface reduces panel resonance for cleaner mid-bass definitions.
• Bracing: 1" center baffle brace — Internal support minimizes panel flex and preserves accurate bass response.
• Finish: Carbon gray stain with polyurethane topcoat — Durable finish that resists wear while maintaining a refined look.
• Wiring: Pre-wired 10ga OFC with metal binding post — Simplifies installation and provides robust high-current connections.
• Power Rating: High power systems — Built to handle demanding amplification when paired with the XL SPL 15" driver.
• Dimensions: Height 22.0", Width 47.75", Depth 22.625" — Large footprint indicates a sizable enclosure suitable for spacious trunk or cargo areas.
• Handcrafted in the USA: Every enclosure is built by hand with zero visible exterior screw holes and fully glued with Titebond III for airtight integrity and durability.
• Lead Time / Availability: Built to order. Ships in 2-3 weeks. All sales final.

The enclosure pairs with a high-power DC XL SPL 15" sub for deep, controlled bass in larger vehicles or installations where trunk depth and mounting width are available. The premium Baltic Birch construction and precise porting deliver a consistent, rigid enclosure that minimizes unwanted resonances, while the show-quality exterior keeps hardware discreet and visually clean.