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NVX NE121P

Single 12" Slot Ported 3/4" MDF Black Carpeted Subwoofer Enclosure – 1.75 Cu. Ft. with Polyfil and NVX Logo

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• 12" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 1.75 cubic feet
• Premium Black Carpet with Black NVX Logo

Learn more about the ne121p
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$135.99

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Current Promotions (1 offer)


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 NE121P

40% off


Priced separately $186 94

Promo Savings of $20 00

Total price:

$166 94

Product Highlights


• 12" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 1.75 cubic feet
• Premium Black Carpet with Black NVX Logo

Description


NVX brand icon

Authorized dealer

Product Details:

  • Not compatible with NVX VC-Series Subwoofers
  • 12" 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: 13-7/8"
  • Subwoofer cutout diameter: 11-7/32"
  • Internal box volume: 1.75 cubic feet
  • Dimensions: 16.50" D x 20.00" W x 16.00" H
  • Authorized Internet Dealer
  • 1-year Sonic Electronix Warranty

Port Specifications:

  • Tuning Frequency: 38 Hz
  • Port Width: 1.5"
  • Port Height: 14.50"
  • Port Length: 17.52"

Product history:

NVX NE121P thumbnail
(newest, current model)
Atrend 12SQV thumbnail
(previous model, replaced by NVX NE121P)
Ground Shaker SQP 1 12 thumbnail
(previous model, replaced by Atrend 12SQV)

Frequently Asked Questions (FAQ)


NE121P 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, NE121S is the way to go.
Most likely not. For example, the NE121P has a generous mounting depth of up to nearly 14". That’s enough clearance for even the beefiest competition-grade magnets to breathe without slamming against the rear wall.
The slot port is tuned to 38Hz, which is the sweet spot for low-end extension. It uses the air inside the box to amplify the deepest notes, giving you that physical rumble that a sealed box just can't match at the same power level.
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.

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Specifications & Details


Box/Enclosure specifications
Subwoofer Size
12"
Subwoofer Cutout Shape
Round / Circle
Box Type
Ported
Number of Subwoofers
1
Box Style/Shape
Square/Rectangle
Cutout Diameter or Length
11-7/32"
Maximum Speaker Depth
13-7/8"
Total Box Volume
1.75 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
1.5" x 14.50"
Port Length
17.52"
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Item Details


Manufacturer:

NVX

Model Number:

NE121P

Weight:

30.00lbs

Internal SKU:

ne121p

Internal Product ID:

222821

Product and How-to Videos


Customer Ratings & Reviews


NVX NE121P thumbnail image

5 star
0%
4 star
50%
3 star
50%
2 star
0%
1 star
0%



Durability
3.5
Value
5
Features
5
Design
5
Usability
4

Customer Reviews

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Nice sounding box but abit tall.

Great sturdy box, carpeting was nicest done only thing i disliked about it was its hight it too tall my trunk is 14.75. But this thing is 16" tall had to cuz the foam that was under the mat to make it barely fit and also re.oved the back seat...it was worth it though, im running a rf-p3d2 12"

By robinson on February 27, 2026 Checkmark Icon Verified purchase
2023 Toyota GR86


By Austin on February 26, 2026 Checkmark Icon Verified purchase
2010 Honda Odyssey




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