
Sundown Audio XV3 8" Triple Bundle
Many in-stock orders ship within 1-2 business days, but timing varies by item. Custom, built-to-order, oversized, special-order, and supplier-direct products may need extra processing time. Free shipping applies to qualifying orders over $99 within the contiguous US. Freight items may require delivery coordination; any shipping exceptions are shown before checkout. Approved returns may be subject to a restocking fee.
Most products are covered by the manufacturer's warranty against defects. Damage from over-powering or improper installation isn't covered — we'll help coordinate any valid claim.
Tell us your vehicle, subwoofers and electrical setup and our team will help you match the right gear. Reach out before you buy.
Bundle Includes: (3) Sundown Audio X-Series v.3 8" 800W X-8 Subwoofer + (1) Sundown Audio XV3 8" Triple Ported Subwoofer Enclosure
Priced at 10% off the combined retail price of the subwoofers and enclosure bought separately. Select your impedance below.
Sundown Audio X-Series v.3 8" 800W X-8 Subwoofer
- RMS Power — 800W (conservative rating)
- Voice Coil — Dual 2-ohm or dual 4-ohm
- Xmax — 19mm linear (~2.4″ p-p before coil leaves the gap)
- Motor — Custom-tooled 8″ frame with aluminum magnet-ID shorting ring
This Listing Includes: (3) Sundown Audio X-Series v.3 8″ X-8 Subwoofers
The Sundown X-8 v.3 is one of the most popular 8″ subwoofers Sundown has ever produced, building on the v1 and v2 and improving on both. The key is its FEA-optimized spider and surround, paired with the custom-tooled 8″ frame that represents the maximum performance possible on that platform. The motor and coil deliver roughly 19mm of one-way linear Xmax — about 2.4″ peak-to-peak before the coil leaves the gap — and an aluminum magnet-ID shorting ring reduces inductive distortion. The 800-watt RMS rating is quite conservative. Available in D2 and D4, it’s right at home in small sealed or ported enclosures.
Features
- FEA-optimized spider and surround for low distortion
- Custom-tooled 8″ frame platform maxed for output
- ~19mm one-way linear Xmax (~2.4″ p-p before the coil leaves the gap)
- Aluminum magnet-ID shorting ring for reduced inductive distortion
- Conservative 800-watt RMS rating
Specifications
| RMS Power | 800W |
| Impedance | Dual 2-ohm or Dual 4-ohm |
| Xmax | 19mm |
| RE (D2 / D4) | 4.0 / 6.0 ohms |
| FS (D2 / D4) | 47.4 / 49.6 Hz |
| VAS (D2 / D4) | 3.6 / 3.2 L |
| Qts (D2 / D4) | 0.31 / 0.36 |
| BL (D2 / D4) | 26.0 / 30.7 |
| Sensitivity (D2 / D4) | 82.1 / 81.8 dB @ 1w/1m |
| Sealed Enclosure | 0.3 – 0.4 cu ft |
| Ported Enclosure | 0.75 – 1.0 cu ft |
| Recommended Tuning | 32Hz |
| Recommended Port Area | 12 – 16 sq in |
| Displacement | 0.13 cu ft |
| Mounting Depth | 6.8″ |
| Outside Diameter | 8.70″ |
| Cut-Out | 7.36″ |
Sundown Audio XV3 8" Triple Ported Subwoofer Enclosure
- Net Volume - 3.0 cu ft
- Tuning - 34.0 Hz
- Port Area - 43.2 sq in
- Sub Cutout - 7.375"
- Construction - 3/4" (18mm) birch plywood construction
This Listing Includes: (1) Basshead Supply ported enclosure for the Sundown Audio XV3 8" subwoofer
This enclosure is custom built specifically for the Sundown Audio XV3 8" subwoofer. Basshead Supply's Performance Series enclosures are subwoofer-specific boxes engineered for strong, clean output, built with a refined assembly process that leaves no visible screw holes. Every box is glued with Titebond III and internally braced, then pre-wired with a recessed satin-nickel binding post and OFC 10-gauge wire - built by hand in the USA. Made to order (2-3 week lead time) and shipping from JS Ultimate Sounds, your Basshead Supply dealer.
Features
- 3/4" (18mm) birch plywood construction
- 13 ply birch veneer construction (1" Baffle 17 ply)
- Gray stained finish
- Refined assembly - no visible screw holes
- Glued with Titebond III and internally braced
- Pre-wired recessed satin-nickel binding post with OFC 10-gauge wire
- Built by hand in the USA
Specifications
| Net Volume | 3.0 cu ft |
| Tuning | 34.0 Hz |
| Port Area | 43.2 sq in |
| Port Dimensions | 13.5" x 3.2" |
| Sub Cutout | 7.375" |
| Construction | 3/4" (18mm) birch plywood construction |
| Finish | Gray stained finish |
| Wiring | Pre-wired metal binding post with 10ga OFC wire |
| Dimensions (HxWxD) | 15.0" x 33.875" x 18.0" |


