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October 27 to November 2, 2026
Sundown Audio UV1 8" Triple Bundle (Baltic Birch)
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.
How this package ships
- Two separate deliveries. Your subwoofers ship from JS Ultimate Sounds and usually arrive first.
- Separate tracking numbers. You will get one for each delivery, so a tracking link showing only part of your order is normal.
- The enclosure is built to order by Basshead Supply and ships direct from them in about 2 to 3 weeks.
- The subwoofers are not pre-installed. You mount them in the enclosure once both have arrived.
- The enclosure arrives finished in a gray stain, ready to install.
What is included
- (3) Sundown Audio U-Series 8" v.1 Subwoofer 1500W RMS
- (1) Sundown Audio UV1 8" Triple Ported Subwoofer Enclosure, Baltic Birch
Priced 10% below buying the subwoofers and enclosure separately.
Choose your impedance below.
Sundown Audio U-Series 8" v.1 Subwoofer 1500W RMS
- Power — 750W RMS / 1,500W Peak
- Voice Coil — Dual 2-ohm or Dual 4-ohm, high-temperature copper
- Former — 2.25” aluminum voice coil former
- Excursion — 18mm one-way linear excursion
- Basket — Heavy-duty cast basket (US Patent D691595)
This Listing Includes: (3) Sundown Audio U-Series 8" v.1 Subwoofers
The U-8 is built for serious output from a compact 8-inch frame, handling 750W RMS and 1,500W peak on dual 2-ohm or dual 4-ohm coils. A 2.25” aluminum voice coil former and high-temperature copper coil maximize heat dissipation, while the solid pole with vent channels, aluminum shorting ring cap, rear gap-venting, and top-plate cooling channels keep the motor running cool. A full 18mm of one-way linear excursion (with mechanical capacity in excess of double the linear limits) paired with a Mega-Roll-style surround delivers incredible linearity. Optimized for small ported enclosures, the U-8 plays like an SA-8 v3 with more power handling, more x-max, and more output potential.
Features
- Optimized for small ported enclosures
- Aluminum 2.25” voice coil former for superior heat dissipation
- Double-stitched surround with stitched-on heavy-duty tinsel leads
- Solid pole with vent channels, aluminum shorting ring cap, and rear gap-venting
- Spring-loaded terminals accept up to 8-gauge wire
Specifications
| RMS Power | 750W |
| Peak Power | 1,500W |
| Impedance Options | Dual 2-ohm (D2), Dual 4-ohm (D4) |
| Voice Coil Former | 2.25” aluminum |
| Linear Excursion | 18mm one-way |
| Basket | Heavy-duty cast (US Patent D691595) |
Sundown Audio UV1 8" Triple Ported Subwoofer Enclosure
- Net Volume - 2.25 cu ft
- Tuning - 35.0 Hz
- Port Area - 32.49 sq in
- Sub Cutout - 7.3"
- Construction - 3/4" (18mm) plywood construction
This Listing Includes: (1) Basshead Supply ported enclosure for the Sundown Audio UV1 8" subwoofer
This enclosure is custom built specifically for the Sundown Audio UV1 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. Custom built to order by Basshead Supply and shipped directly from them, about 2 to 3 weeks.
Features
- 3/4" (18mm) plywood construction
- 13 ply birch veneer construction
- 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 | 2.25 cu ft |
| Tuning | 35.0 Hz |
| Port Area | 32.49 sq in |
| Port Dimensions | 11.5" x 2.825" |
| Sub Cutout | 7.3" |
| Construction | 3/4" (18mm) plywood construction |
| Finish | Gray stained finish |
| Wiring | Pre-wired metal binding post with 10ga OFC wire |
| Dimensions (HxWxD) | 13.0" x 32.0" x 16.625" |
