Name: NVX NE121P
Brand: NVX
SKU: ne121p
Price: 136.95 USD
Availability: InStock
Rating: 4.4074 (26 reviews)

Shop all NVX

by NVX

Current Promos
About
FAQ
Similar Products
Specs & Details
Product Videos
Reviews
Add-ons
Related Searches

Limited time!

Product videos

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

Learn more about the ne121p

Discover more. Set your vehicle.

$135.99

with warranty

Starting at $13/mo

or 4 payments of $34

Purchase $400 or More of NVX and Save 15%!

Free shipping in USA. Provide zip for delivery date.

Quantity Qty

In Stock

Brand new

Buy it now

Alternative financing

No Credit Option

Flexible Lease Payments

Early Purchase Options

Quick Approval Decision

Our X-Factor Guarantees

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

Award-Winning Service

FREE Shipping Orders $49+

60-Day Easy Returns

Guaranteed Lowest Price

In-House Experts

NVX - Worth the Envy - Direct to Consumer Car Audio

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 NE121P

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

40% off

NVX NE121P

$136 ⁹⁵

NVX SDTK20

$49 ⁹⁹

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

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

Frequently Asked Questions (FAQ)

Why should I choose a sealed enclosure like the NE121P over its ported counterpart (NE121S)?

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.

Will a high-excursion 12" sub with a massive magnet hit the back panel of NE121P?

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.

My hip-hop tracks feel like they’re missing deep beats, sounding hollow. How does the NE121P help?

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.

Can I add more Polyfill to the NE121P?

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 NE121P 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.

Specifications & Details

Box/Enclosure specifications

Subwoofer Size

12"

Subwoofer Cutout Shape

Round / Circle

Box Type

Ported

Number of Subwoofers

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

Terminal Type

Binding posts (banana clip ready)

Box Exterior Color

Black

Box Finish

Carpet

Tuning Frequency

38 Hz

Port Details

Number of Ports

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

Customer Ratings & Reviews

Overall rating distribution

5 star		58%
4 star		35%
3 star		4%
2 star		4%
1 star		0%

Filter by Star Rating

Show only Verified Purchases

By feature average rating

Durability		4.5
Value		4.8
Features		4.7
Design		4.7
Usability		4.7

Customer Photos & Videos

Customer Reviews

Sort by:

review on the box amp and speaker that I bought great buy on all

The following review is for a previous version (12SQV).

it was a great buy the sub was is the best sub I've ever bought definitely worth the value and the amp it was definitely worth the value also

By sonicSam on April 21, 2015 Checkmark Icon

Verified purchase

46 found this helpful

Report abuse

Your choice...

The following review is for a previous version (12SQV).

I bought the single 12 inch box for my rockford fosgate P3, the box makes my sub hit very clean and hard. The only problem is that Sonic Electronics ships the sub box with NO protection. I recieved the box with 3 dings in it but sonic couldnt help me out. So its hit or miss...

By Ryan on May 19, 2016 Checkmark Icon

Verified purchase

36 found this helpful

Report abuse

It's a good box

The following review is for a previous version (12SQV).

It's a good box but it didn't fit my re sub I had to cut the opening alittle so it can fit

By Robert on September 3, 2015

37 found this helpful

Report abuse

No clean bass!

The following review is for a previous version (SQP 1 12).

Been running a sealed box sounded great too!. Everyone pushed me into a ported box (this one) raving how hard it will hit.. installed my Alpine SWR-12D2... on my PPI 1000.1 amp @ 1 ohm. Sounds great on Rap! So if thats ALL you listen too then get this box... But on Dub step and rock, the sound quality crap. Back in the early 2000s i ran a similar sub on a circle port Q logic box and it sounded way better then this box. So for all you lovers or ported boxes im not bi est. I do like ported if tuned right. The problem is if you are not running a box specifically designed for the sub you have I would go sealed and make sure your sub is getting the exact RMS it can take. The sealed box I have is the same brand. SOUNDS AWSOME!!

By Kenny on April 23, 2014

35 found this helpful

Report abuse

great buy worth the money

The following review is for a previous version (SQP 1 12).

this box sounds awesome, the carpet is very clean, and is built very nice, makes my alpine type SWX-1243D bump a lot harder then my last box and sounds much cleaner.

By cody on January 6, 2014

31 found this helpful

Report abuse

Atrend 12SQV

The following review is for a previous version (12SQV).

For a prefab box it is good but if you want to get the best out of your speakers build a box to there spec's

By Anonymous on May 25, 2018 Checkmark Icon

Verified purchase

28 found this helpful

Report abuse

Atrend 12SQV

The following review is for a previous version (12SQV).

Solid build great look and fell, fits great in 97 Honda civic coupe trunk

By Anonymous on May 23, 2018 Checkmark Icon

Verified purchase

27 found this helpful

Report abuse

Decent box for the price

The following review is for a previous version (12SQV).

Gets the job done. Not the best looking thing in the world but I am pleased with it. For 70 bucks I couldn't pass it up and I am glad I didn't. Still holding up after a year of almost daily use with a Kicker CompVX in it being pushed pretty hard.

By John on January 22, 2021

26 found this helpful

Report abuse

Atrend 12SQV

The following review is for a previous version (12SQV).

Id have to give it a honest for stars only because of the subwoofer I'm running needs a bigger box. Great for something that's putting out consistent thousand RMS at 35 to 55 Hertz.But for me I'm currently running 1600 rms.

By Anonymous on May 18, 2018

27 found this helpful

Report abuse

12 inch subwoofer enclosure

The following review is for a previous version (12SQV).

It looks well made. I haven't installed it yet. I plan on installing a Rockford Fosgate T0 12inch sub with a RF BDCP1500 pushing it. Cutting the amp down to about 750 watts. I can't wait to hear how it sounds. Judging by past Attend enclosures I've owed, it should be a ground shaker!!!

By gdrakec22 on October 21, 2016

26 found this helpful

Report abuse

See all 26 reviews

Add-ons