Single 15" Ported Birch Subwoofer Enclosure for Sundown v4 NS Series — 4.25 cu ft, Tuned 30 Hz, 24mm (1-inch) Birch Wood

Engineered for a single 15" Sundown v4 NS Series driver, this ported enclosure produces deep, controlled bass with authoritative low-end punch. The cabinet offers a net internal volume of 4.25 cubic feet and is tuned to 30 Hz to deliver impactful, precise low-frequency response. Built from sturdy 24mm (1-inch) birch wood, the box provides durable construction and acoustic stability for consistent performance. Ideal for Sundown v4 NS Series subwoofers that benefit from a ported design for extended bass extension.