NVX NE81P Empty Single 8" Vented Subwoofer Enclosure

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NVX NE81P Empty Single 8" Vented Enclosure-video

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Product highlights

• 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

Universal – fits most vehicles.

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List price $89.99

-17%

$74.99

with warranty

Starting at $14/mo

or 4 payments of $19

Free shipping in USA. Provide zip for delivery date.

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Current Promotions (1 offer)

40% off a Sound Deadening Trunk Kit!

Get the most out of your Loaded Enclosure with the NVX SDTK20. Eliminates road noise, quiet vibrations, and increase the sound quality and output of audio system, 50%. Simply click the "Add Both to Cart" button. This offer cannot be combined with any other coupons or offers.

NVX NE81P Empty Single 8

NVX NE81P Empty Single 8" Vented Enclosure

https://images.sonicelectronix.com/images/5427831/main/sdtk20.jpg

40% off

NVX NE81P Empty Single 8" Vented Enclosure

$74 ⁹⁹

NVX SDTK20

$49 ⁹⁹

Priced separately $124 ⁹⁸

Promo Savings of $20 ⁰⁰

Total price:

$104 ⁹⁸

Product Highlights

• 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

Description

Authorized dealer

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"

Frequently Asked Questions (FAQ)

Why should I choose a ported enclosure like the NE81P over its sealed counterpart (NE81S)?

NE81P is great for peak SPL and room-shaking rumble. The ported slot releases air pressure and amplifies the low-end. This is ideal for large SUVs and trucks and when you want thunderous bass. However, if you want a tight bass, NE81S is the way to go.

I'm working on a custom-box for my 8" subwoofer. Can I work on a bigger box like the NE101P 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.

Can the NE81P fit in a small sedan with a tiny trunk? Can I get decent bass in a small space?

Yes. This 0.75 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.

Can I add more Polyfill to the NE81P?

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.

What’s with the choice to build NE81P with rounded corners?

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.

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Specifications & Details

Box/Enclosure specifications

Subwoofer Size

8"

Subwoofer Cutout Shape

Round / Circle

Box Type

Ported

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

.75 cubic feet

Wood Thickness

3/4"

Number of Terminals

1

Terminal Type

Binding posts (banana clip ready)

Box Exterior Color

Black

Box Finish

Carpet

Tuning Frequency

38 Hz

Port Details

Number of Ports

1

Tuning Frequency

38 Hz

Port Diameter

1" x 10"

Port Length

21"

Warranty and Return Policy

Parts Warranty Duration

1 year

Labor Warranty Duration

1 year

Warranty Provider

Sonic Electronix

Customer Ratings & Reviews

NVX NE81P Empty Single 8

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By Eliseo on June 23, 2026 Checkmark Icon

Verified purchase

Report abuse

Looks good, sounds good at a good price

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

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By Abram on May 21, 2026 Checkmark Icon

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2017 Jeep Renegade

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