SKU: 91628827508

Sundown Audio - U-Series v.1 6.5"

Sale price$135.00 Regular price$150.00
Save 10%

Pay in installments of $37.50 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 5 - Aug 10

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Sundown Audio - U-Series v.1 6.5"500 Watts RMS 1000 Watts Peak Dual 2 or 4 ohm voice coils Optimized for small ported enclosures Aluminum 1. 75 voice coil former for superior heat dissipation High temperature copper voice coil Double stitched surround Heavy duty cast basket Spring loaded terminals accept up to 8 gauge wire Stitched on heavy duty tinsel leads Solid pole with vent channels and aluminum shorting ring cap Rear gap venting Top Plate Cooling Channels Perfect for high power

  • 500 Watts RMS/1000 Watts Peak
  • Dual 2 or 4 ohm voice coils
  • Optimized for small ported enclosures
  • Aluminum 1.75” voice coil former for superior heat dissipation
  • High-temperature copper voice coil
  • Double stitched surround
  • Heavy-duty cast basket
  • Spring-loaded terminals accept up to 8-gauge wire
  • Stitched-on heavy-duty tinsel leads
  • Solid pole with vent channels and aluminum shorting ring cap
  • Rear gap-venting
  • Top-Plate Cooling Channels

Perfect for high-power underseat enclosures and designed to be at home in the competition lanes or playing your favorite tunes, the U Series is the premier “standard suspension” woofer in the Sundown lineup. A double-stacked 9” wide ferrite magnet system is coupled to a thick top plate. A thick set of shorting rings are also used inside the magnets and on the pole cap, smoothing out frequency response while doubling as a heat sink and airflow guide. An all-new, substantially thicker custom aluminum frame was designed specifically for the U Series, and equipped with heat-dissipation ribs. The v.2 motor also features an extended pole piece to keep the coil controlled under high stress!

Specifications

RE (Ohms) 4.0586 6.6274
FS (Hz) 41.9533 38.6925
VAS (L) 2.9053 3.7701
Qes 0.5238 0.5005
Qms 8.5834 7.2470
Qts 0.4937 0.4681
Le (mH) 4.0112 5.5892
BL (NA) 16.7428 20.0082
Mms (Grams) 137.2546 124.3518
Cms (uM/N) 104.8528 136.0613
Sens (dB @ 1w/1m) 77.8706 78.1460
Xmax 19mm 19mm
T/S SPECS U-6.5SW" D2 U-6.5SW" D4
   

Enclosure Specifications

  • Ported Enclosure
    • Size: .25-.35 cu. ft. net
    • Port Area: 4-5 sq. in.
    • Port Tuning: 35hz -40hz
  • Sealed Enclosure
    • Size: 0.125-0.2 cu. ft. net
    • Displacement:  .04 cu. ft. 
  • Depth:  5.71"
  • Outside Diameter: 7.17"
  • Cutout: 5.94"

Physical Dimensions

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 91628827508

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.2 ★★★★★
Based on 19 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
M
Verified Purchase
mfdumont
Alexandria, US
★★★★★ 5
Great price and perfect fit.
Size: 26"+20"+12"B(U/J Hook)
All three blades worked great for my 2023 Grand Cherokee. Well worth the money! Make sure you know how to take the old blades off! I had issues with the rear blade, but finally worked it out. The rear blade is 12 inches long, but the factory blade was 10 inches, presumably to clear the roof camera. FYI the 12 inch blade works fine.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
T
Verified Purchase
Tom C.
Belleville, US
★★★★★ 5
Easy Install and Skip Free
Size: 19"+18"+10"(U/J Hook)
This is a good kit - the second one I bought for a different car. Wipers seem to wipe ok. That is if you first remove the little blade guards that come with each wiper, just like the ice skaters use for their Olympic level blades. And having all three blades (two front and one back) ordered specifically to fit the car, I didn't have to guess and take multiple trips to AutoZone or Advance or O'Riellys. Sometimes the reviewer bot likes to know about some specifics as well. So . . . these fight a great battle to resist rain. And with a lever inside the car, these wipers are easy to use once installed. They are really fast when they slide out of the box. Having had some cars where the wipers fell off, I can attest to the safety that any wiper gives the driver, regardless of it's durability or speed. So I look forward to the safety these wipers will afford over having metal arms scratching across the windshield like fingernails on a chalk board.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 22, 2026
S
Verified Purchase
scott thomas
West Palm Beach, US
★★★★★ 5
Quality Wipers
Size: Combo Pack (23" & 19"), Style: Top Lock Narrow
These Bosch Aerotwin wipers are a perfect fit for my 2020 Audi Q5 and work exactly as expected. Installation was quick and straightforward, and they snapped right into place with no issues. They wipe smoothly and quietly, leaving the windshield crystal clear even during heavy rain. Performance feels very close to OEM quality—no streaking, no skipping, just consistent and reliable cleaning. They also hold up well at highway speeds without lifting or making noise. Overall, a great upgrade or replacement for the Q5. Highly recommend if you want dependable, factory-style performance without paying dealership prices.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
J
Verified Purchase
Jean Paul
Fort Morgan, US
★★★★★ 5
Perfect Fit for Volvo XC90
Size: Combo Pack (23" & 19"), Style: Top Lock Narrow
These Bosch Aerotwin wiper blades fit my 2021 Volvo XC90 Inscription perfectly. Installation was quick and straightforward, and they perform exceptionally well. They provide a smooth, streak-free wipe even in heavy rain, and operate quietly without chatter. The build quality feels premium and durable. Overall, a great upgrade that delivers excellent visibility and reliability in all conditions.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
A
Verified Purchase
anthony f. san felippo
San Leandro, US
★★★★★ 5
Great Product
Size: Combo Pack (26" & 20"), Style: Top Lock Narrow
Fits my 2022 Tesla Model S Plaid perfectly! Easy to install and cheaper than going through Tesla
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026

recommand products