Sundown Audio Single 18" Xv3 Ported Enclosure - AABE-SA-Xv3-S18SUPB-HD
Lead time is 2-3 weeks, no refunds once enclosures have been cut out! This is a custom made box specifically for the Sundown Audio Xv3 18" subwoofer. At Basshead Supply the goal with the “branded series” enclosures is to offer subwoofer specific enclosures that are well built, well performing and good looking enclosures at an affordable price. Using premium 1” Baltic Birch all around we are able to achieve a very strong and light enclosure. Using our refined assembly process produces an enclosure with NO visible screw holes anywhere on the enclosure. The entire enclosure is glued together with Titebond III and coupled with our 1” baffle and an additional 24mm baffle brace (on the dual subwoofer models) the enclosure is strong enough to handle high power subwoofer setups. Finished off with our carbon gray stain and a polyurethane finish these enclosures have a unique look to set it apart from all the generic prefabs. Complete with a recessed Satin Nickel Brass binding posts and prewired with OFC 10g wire, you are ready to go the moment it arrives. These are also built with love, by hand right here in the UNITED STATES OF AMERICA.
Custom built enclosure specifically for the Sundown Audio Xv3 18" subwoofer.
Specifications
| Net Internal Volume |
7.0 cubic feet |
| Tuning Frequency |
30 Hz |
| Port Area |
95.64 sq in |
| Port Dimensions |
18” (L) x 5.33” (H) |
| Subwoofer Cut-Out Diameter |
17.01 inches |
| Material |
1" Birch Plywood |
| Construction |
17-ply Birch Veneer |
| Finish |
Gray Stained |
| Terminal |
Pre-wired Metal Binding Post |
Dimensions/Weight
- 20" tall
- 39.75" wide
- 24.625″ deep
What Our Experts Think
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Custom-Built for Xv3: Precision-engineered to match the performance profile of the Sundown Xv3 18" subwoofer.
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Deep, Controlled Bass: Optimized port tuning delivers tight, low-frequency response with minimal distortion.
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Durable Construction: High-strength MDF and internal bracing ensure structural integrity under extreme bass loads.
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Maximized Airflow: Large flared port design enhances output and airflow while reducing port noise.
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Ready for High Power: Designed to handle the Xv3’s high wattage and excursion for peak performance.
Q&A
Q: What is the Sundown Audio Single 18" Xv3 Ported Enclosure?
A: A precision-engineered ported enclosure built specifically for the Sundown Audio 18" Xv3 subwoofer, delivering deep, clean bass with high output.
Q: Is this enclosure tuned for daily listening or competition?
A: Designed for high-performance daily use with strong low-frequency response and loud output.
Q: What materials are used in construction?
A: Constructed from ¾" MDF with double baffle reinforcement and a high-flow port system for durability and optimal performance.
Q: Will it fit other 18" subwoofers?
A: No, it's custom-fit for the Sundown 18" Xv3 subwoofer. Compatibility with other models is not guaranteed.
Q: Is it ready to use out of the box?
A: Yes, the enclosure ships fully assembled—just install your subwoofer and wire it up.
Maintenance Tips
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Clean regularly: Wipe down the surface and ports with a soft, dry cloth to prevent dust buildup.
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Moisture control: Store in a dry, climate-controlled area to avoid MDF and carpet damage.
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Inspect wiring: Check speaker terminals and connections monthly for tightness and corrosion.
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Proper power handling: Use an amplifier that matches the subwoofer's RMS rating (~2000-2500W) to prevent damage.
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Secure mounting: Anchor the enclosure properly to minimize movement and prevent vibrations.
