Garage
Shop

NVX NE81S

Single 8" Sealed 3/4" MDF Black Carpeted Subwoofer Enclosure – 0.45 Cu. Ft. with Polyfil and NVX Logo

NVX
Shop all NVX
Limited time!
Out of stock
Product videos
highlight-star-icon

• 8" Single Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: .45 cubic feet
• Premium Black Carpet with Black NVX Logo

Learn more about the ne81s
Light bulb Icon

Discover more. Set your vehicle.

2026-07-27 11:08:20
List price $65.99
Thanks , You Pay:
-9%

$59.99

 with warranty
Starting at $11/mo or 4 payments of $15 Buy now, pay later and installment payment plans are offered by Afterpay and Affirm. Learn more

Heads up

We confirm fitment and offer accessories for speakers. Please set your vehicle first if you would like to purchase more than one ne81s.

Set your vehicle or Return to product page
Purchase $400 or More of NVX and Save 15%!
Quantity
Out of stock - Order risk-free, cancel any time.
Brand new

Acima Logo

No Credit Option

Flexible Lease Payments

Early Purchase Options

Quick Approval Decision

Swoosh Icon Icon of Swoosh

For over 25 years, we've been your X-Factor – the team dedicated to having the biggest impact on your shopping experience!

Award winning icon
Award-Winning Service
Shipping icon
FREE Shipping Orders $49+
60 days return policy icon
60-Day Easy Returns
lowest price guarantee icon
Guaranteed Lowest Price
inHouseExpert
In-House Experts
NVX - Worth the Envy - Direct to Consumer Car Audio

Product Highlights


• 8" Single Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: .45 cubic feet
• Premium Black Carpet with Black NVX Logo

Description


NVX brand icon

Authorized dealer

Product Details:

  • Not compatible with NVX VC-Series Subwoofers
  • 8" Single Sealed 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: .45 cubic feet
  • Dimensions: 11.25" D x 11.50" W x 11.50" H
  • Authorized Internet Dealer
  • 1-year Sonic Electronix Warranty

Frequently Asked Questions (FAQ)


NE81S is better for audiophiles who want a tight but not forceful bass. Like other sealed enclosures, NE81S is quite smaller so it would save some space in your car. However, if you really want an earth-shattering low-end, go ahead with NE81P instead.
We don't recommend it especially because the cutout diameter of your 8" sub wouldn't work with the NE101S's 9.25" cutout diameter. NE81S is already enough to cover various 8" subwoofers.
Yes. This 0.45 cu. ft. box is incredibly compact. It's the right choice for adding musical low-end to a daily driver while still leaving plenty of room for groceries, a spare tire, or your gym bag.
We don't recommend. NVX includes just enough to help the box act about 15-20% larger sound-wise. Adding too much can actually choke the sub's movement. Only add more if your sub's specs significantly exceed the box's actual internal volume.
It’s for durability and fitment. Sharp MDF corners under carpet are prone to bruising or chipping during installation. Rounded edges prevent the carpet from tearing and make it much easier to slide the box into tight trunk gaps.

This product is temporarily out of stock. May we recommend...

1SV12B small

Single 12" Vented MDF Subwoofer Enclosure (Belva 1SV12B)

• Single 12" Vented MDF Enclosure
• Holds one 12" subwoofer
• 3/4 MDF (Medium Density Fiberboard) Construction
• Durable black carpeting
• Gold Terminals
• Internal Box Volume: 1.8 cubic ft.

(123)

$79.99

List price $95.99

Dual 12in P small

Tru Spec Dual 12in P (1460YX)

• 12" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 3.50 cubic feet
• Compatible for Sundown SA 12V2 subwoofers (Sold separately)

(6)

$234.99

List price $299.99

MDFS10 small

Single 10" Sealed MDF Subwoofer Enclosure (Belva MDFS10)

• 0.77 cu ft Sealed Enclosure
• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

(121)

$59.99

List price $99.99

NE101S small

NVX NE101S

• 10" Single Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: .65 cubic feet
• Premium Black Carpet with Black NVX Logo

(4)

$69.99

List price $83.99

MDFD12 small

Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12)

• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

(121)

$99.99

List price $119.99

MDFS12 small

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

(172)

$69.99

List price $69.99

UBE-GM-VETC6 small

NVX Empty BOOST Box - 2006-2013 Chevrolet Corvette - UBE-GM-VETC6

• Custom Fit Empty Single 10" BOOST Sealed Enclosure
• Compatible with select 2006-2013 Corvette
• Made with hand-laid fiberglass shell covered in Carpet
• Total box volume: .60 cubic feet

$249.99

List price $275.99

Single 12” small

Tru Spec Single 12" (1447TS)

• 12" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 1.75 cubic feet
• Compatible for Sundown SA12V2 subwoofers (Sold separately)

(9)

$174.99

List price $289.99

NE101P small

NVX NE101P

• 10" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 1.50 cubic feet
• Premium Black Carpet with Black NVX Logo

(39)

$84.99

List price $101.99

NE151P small

NVX NE151P

• 15" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 3.50 cubic feet
• Premium Black Carpet with Black NVX Logo

$149.99

List price $179.99

Specifications & Details


Box/Enclosure specifications
Subwoofer Size
8"
Subwoofer Cutout Shape
Round / Circle
Box Type
Sealed
Number of Subwoofers
1
Box Style/Shape
Square/Rectangle
Cutout Diameter or Length
7-3/8"
Maximum Speaker Depth
8-5/8"
Total Box Volume
.45 cubic feet
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:

NE81S

Weight:

15.00lbs

Internal SKU:

ne81s

Internal Product ID:

222811

Product and How-to Videos


Customer Ratings & Reviews


NVX NE81S thumbnail image

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



Durability
0
Value
0
Features
0
Design
0
Usability
0

Customer Reviews

Sort by:

Loading...
This item does not have any detailed reviews, but has 1 rating from customers

Related Searches


Save up to 10 different vehicles in your garage

Add vehicle
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.