Atrend Single 18 in Ported Box for Sundown M-X-Z-NS (Nightshade) Series Subwoofers- All 1 in Enclosure - Proudly USA Built.

Single 18 in Ported box for Sundown X - Z - Nightshade Series Subwoofers - All 1 in Enclosure - Proudly USA BuiltProudly built in the USA with over 30 years of engineering expertise, this enclosure is crafted to exacting standards using premium MDF materialsThis Enclosure delivers optimal performance for the subwoofer series it's built to support, with ideal net volume, port area, and tuningEngineered with precision miter and dado joints, this enclosure ensures maximum structural integrity and sound qualityHeavy - duty Trick Glue holds each panel with up to 3600 PSI of strength while maintaining vibration resistanceSelect models feature full 1 in MDF construction and additional internal bracing for unmatched durabilityEach enclosure is finished in premium black, plush, or charcoal carpet and includes High-End Spring Loaded terminal cups

• Built from heavy-duty 1" MDF with CNC-cut, miter-joined panels for tight bass and low distortion.
• Precision-tuned vented design fits single 18" woofers; optimized for Sundown; Net: 6.5 ft^3 per sub; Tuned: 32 Hz.
• Optimized port tuning at 32 Hz for tight, responsive low‑end extension.
• Internal air volume (per sub): 6.5 cu ft for optimal driver performance.
• Dimensions (Width x Height x Depth): 32.5 x 19.5 x 22.25