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NVX NE81P w/Sundown Audio X V.4 8" D4

Single 8" Slot Ported 3/4" MDF Black Carpeted Subwoofer Enclosure – 0.75 Cu. Ft. with Polyfil and NVX Logo w/1000W RMS 8" X Series Dual 4-ohm Car Subwoofer

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• 8" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: .75 cubic feet
• Premium Black Carpet with Black NVX Logo

Learn more about the ne81p_xv48d4
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2026-07-27 11:08:20
List price $569.98
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-19%

$459.98

 with warranty
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NVX - Worth the Envy - Direct to Consumer Car Audio

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Description


NVX brand icon

Authorized dealer

NVX NE81P

Single 8" Slot Ported 3/4" MDF Black Carpeted Subwoofer Enclosure – 0.75 Cu. Ft. with Polyfil and NVX Logo
Quantity: 1

Product Details:

  • Not compatible with NVX VC-Series Subwoofers
  • 8" Single Ported Subwoofer Enclosure
  • Made from 3/4" Medium Density Fiberboard (MDF) construction
  • Built with precision CNC technology for exceptional accuracy
  • Pre-lined with Poly-Fil for improved acoustic response
  • Premium Black Carpet with Black NVX Logo
  • Spring Loaded Push Terminals
  • Maximum subwoofer mounting depth: 8-5/8"
  • Subwoofer cutout diameter: 7-3/8"
  • Internal box volume: .75 cubic feet
  • Port Tuning Frequency (Fb): 38 Hz
  • Dimensions: 15.25" D x 15.00" W x 11.50" H
  • Authorized Internet Dealer
  • 1-year Sonic Electronix Warranty

Port Specifications:

  • Tuning Frequency: 38 Hz
  • Port Width: 1"
  • Port Height: 10"
  • Port Length: 21"

Sundown Audio X-8 v.4 D4 8" (X8V4D2)

2500W Peak (1250W RMS) 8" X Series Dual 4-ohm Car Subwoofer (SW-XV48D4)
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  • 8" Dual 4 ohm X Series Subwoofer
  • Power Handling:
    • Peak: 2500 watts
    • RMS: 1250 watts
  • Pressed Paper Cone
  • Pressed Foam Surround
  • Hyper-extended pole construction
  • Finite Element Analysis (FEA) optimized spider and surround
  • Newly revised version of classic custom-tooled 8" frame
  • Features an aluminum magnet ID shorting ring for reduced distortion
  • Motor and coil are capable of 20 mm of linear x-max one-way
  • 2.5" High Temperature Voice coil
  • 19 mm Xmax
  • Triple Stacked magnet motor structure
  • Resonance Frequency (Fs): 44.15 Hz
  • Sensitivity: 79.8 dB
  • Recommended sealed box volume: 0.3 cubic feet - 0.4 cubic feet
  • Recommended ported box volume: 0.75 cubic feet - 1 cubic feet
  • Top-mount depth: 7.56"
  • Cutout diameter: 7.32"
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

  • Priced Individually


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Specifications & Details


Subwoofer Specifications
Series
X Series
Subwoofer Size
8"
RMS Power Handling
1000 watts
Sensitivity
79.8 dB
Subwoofer Design
Round / Circle
Enclosure Specifications
Box Type
Ported
Number of Subwoofers
1
Box Style/Shape
Square/Rectangle
Wood Thickness
3/4"
Number of Terminals
1
Terminal Type
Binding posts (banana clip ready)
Box Exterior Color
Black
Box Finish
Carpet
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Item Details


Manufacturer:

NVX

Model Number:

NE81P_XV48D4

Weight:

57.00lbs

Internal SKU:

ne81p_xv48d4

Internal Product ID:

228866

Customer Ratings & Reviews


NVX NE81P w/Sundown Audio X V.4 8

5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
4.4
Value
4.3
Features
4.5
Design
5
Usability
5

Customer Photos & Videos


Customer Reviews

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The following review is for NE81P, which is a part of the bundle you are viewing.
By Eliseo on June 23, 2026 Checkmark Icon Verified purchase


Looks good, sounds good at a good price

The following review is for NE81P, which is a part of the bundle you are viewing.

I'm not an expert, but this enclosure impressed me.
Nice, black carpeting... Lettering is matte black, not blue like the online pictures... Which is better IMO. Enclosure has some weight to it, which makes it feel heavy duty.
This enclosure was the perfect volume size for my P3 subwoofer, and it sounds great.
If I could improve on this box, I would say the terminals could have been installed more straight instead of at an angle. It also could've been installed more toward the bottom. But those are minor gripes. I'm happy with this box and what I paid for it.

By Lee on June 16, 2026 Checkmark Icon Verified purchase


The following review is for SW-XV48D4, which is a part of the bundle you are viewing.
By Guillermo on May 22, 2026 Checkmark Icon Verified purchase


The following review is for NE81P, which is a part of the bundle you are viewing.
By Abram on May 21, 2026 Checkmark Icon Verified purchase
2017 Jeep Renegade


The following review is for SW-XV48D4, which is a part of the bundle you are viewing.
By Barrie on March 1, 2026 Checkmark Icon Verified purchase


Amazing sound!!

The following review is for SW-XV48D4, which is a part of the bundle you are viewing.

Wanted to dip into the
lows ,and still thump a little… just barely breaking it in-but I couldn’t be happier with the sound quality. I was genuinely shocked. I fully expected it to thump and hit low, but didn’t realize it was gonna sound this good while doing it. Time will tell how it holds up… but so far this thing is outstanding. I can’t wait to crank it up after a little break in period.

By John on August 10, 2025 Checkmark Icon Verified purchase



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