Sundown Audio has built its reputation on heavy-duty subwoofers that thrive on serious power. But to unlock their full potential, the enclosure must match the driver’s requirements. Atrend’s Sundown-specific boxes are engineered around proper port area, tuning, and net internal volume—so your system performs exactly as intended.
Popular Sundown Subwoofers
- X-12 / X-15 Series: High-excursion subs that demand large ported enclosures with proper bracing and airflow.
- ZV6 Series: SPL-oriented drivers requiring oversized ports to keep velocity low under extreme power.
- U Series: A versatile daily-driving subwoofer that thrives in tuned vented enclosures around 32–35 Hz.
Atrend boxes are designed with these drivers in mind, ensuring the correct volume and port geometry are applied so Sundown subs stay loud, clean, and reliable.
Why Port Area and Tuning Matter for Sundown
Sundown drivers move massive amounts of air. If the port area is too small, velocity spikes and causes noisy “chuffing.” If the tuning frequency is off, output shifts away from the sub’s sweet spot. Atrend enclosures are engineered to maintain balanced port velocity and hit recommended tuning frequencies—whether your goal is low-end depth or SPL competition performance.
Built to Handle Real Power
- High-grade MDF or birch panels from 3/4″ up to and beyond 1″
- Internal bracing to eliminate panel flex and distortion
- Premium terminals and airtight assembly
- Finishes in carpet, vinyl, stained birch, or hydrographics
Our Sundown boxes are built with the same “indestructible” standard Sundown owners expect from their subs.
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Don’t See Your Sundown Model Listed?
We don’t build enclosures for every single Sundown driver—but that’s where our Build Your Own Box program comes in. Tell us your model, vehicle, and goals, and we’ll engineer a box with the correct port area, tuning, and net volume—built from 3/4″–1″ MDF or birch, braced, and USA-made.
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Conclusion
Sundown Audio subs demand serious enclosures, and Atrend delivers. With boxes engineered for proper port area, tuning, and net volume—and the BYOB program as a custom option—you get the most reliable path to extreme output and long-lasting performance.