SKU: 60567051043

Sundown Audio - X-Series v.4 8”

Sale price$292.50 Regular price$325.00
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Description

Sundown Audio - X-Series v.4 8”1250 Watts RMS 2500 Watts Peak Dual 2 or 4 ohm voice coil Made for extremely deep bass Triple stacked magnet 2. 5 voice coil Hyper extended pole Built to order Designed with an extended pole piece and an incredible four inches of peak to peak excursion, the X v. 4 is engineered for ultra deep bass and high power handling. Engineered to set a new standard in the low frequency small ported box subwoofer category, the X Series can also work in up to a

  • 1250 Watts RMS / 2500 Watts Peak
  • Dual 2 or 4 ohm voice coil
  • Made for extremely deep bass
  • Triple-stacked magnet
  • 2.5” voice coil
  • Hyper-extended pole
  • Built to order

Designed with an extended pole piece and an incredible four inches of peak-to-peak excursion, the X v.4 is engineered for ultra-deep bass and high power handling. Engineered to set a new standard in the low-frequency/small-ported-box subwoofer category, the X Series can also work in up to a 50% larger enclosure if you desire even more low-end extension.

The X v.4 series differentiates itself with its incredibly linear suspension, ensuring the lowest level of bass extension in a small enclosure while maintaining extremely low levels of distortion. Notably, the v.2 series features a much larger motor structure (220mm vs. 190mm on the v.1 series), improved motor ventilation, and an all-new Mega-Roll v.2 surround, providing a more linear and rugged update to the world-famous Mega-Roll v.1 surround design.

Specifications

T/S SPECS X V.4 8″ D2 X V.4 8″ D4
RE (Ohms) 3.6 6.0
FS (Hz) 41.299 44.150
VAS (L) 4.126 3.562
Qes 0.436 0.497
Qms 1.941 2.300
Qts 0.356 0.409
Le

BL (NA) 21.576 27.141
Mms (Grams) 215.153 220.090
Cms  68.389 59.044
Sens (dB @ 1w/1m) 80.1

79.8

Xmax 19mm

19mm

Enclosure Specifications


X v.4 8
Sealed Enclosure 0.3-.04cuft
Ported Enclosure 0.75-1.0 cu ft
Recommended Tuning 32hz
Recommended Port Area 12-16 sq in
Displacement 0.13 cu ft
Depth 7.56"
Outside Diam. 8.71"
Cutout 7.32"
 

Shipping Notes
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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]
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SKU: 60567051043

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Ashley Hunsberger
Port Orchard, US
★★★★★ 5
The cutest backpack!
Size: One Size, Color: Lilac Ditsy Floral
I was worried maybe this backpack wouldn’t last us the school year. I was pleasantly surprised as we are nearing the end of the year. It’s the most adorable pink and purple bag! It is on the smaller side but we’ve still been able to fit a normal sized folder in it plus her extra clothes and snacks with some room still.
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Reviewed in the United States on March 24, 2026
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Heather-Leigh Scott
Louisville, US
★★★★★ 5
VERY NICE BUT TOO BIG
Size: One Size, Color: Lilac Ditsy Floral
Let me start by saying its a great product and looked to be made very well. I did have to return it though because it was far too big for my child. Other than size being 1 size fits all with no dimensions given and, yes, somewhat smaller than other backpacks (for adults) it seemed to be a decent backpack. Too bad we couldn't use it but if you have a older kid would would great for.
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Reviewed in the United States on December 5, 2025
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Melissa
Cuba, US
★★★★★ 3
Size too small.
Size: One Size, Color: Beige Leopard
It was too small. Couldn’t fit my everyday planner in it.
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Reviewed in the United States on December 29, 2025
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Savannah
Boise, US
★★★★★ 5
Good Quality
Size: One Size, Color: Light Pink
Bought this for my 2 year old daughter for daycare. Big enough to fit her blanket, diapers wipes and extra clothing. Good quality and fits her well. She loves it.
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Reviewed in the United States on December 3, 2025
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Mocha
West Palm Beach, US
★★★★★ 4
Too small
Size: One Size, Color: Light Blue Shark Waves
Its too small for my kindergartener.
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Reviewed in the United States on December 9, 2025

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