NVX NE121S Empty Single 12" Sealed Subwoofer Enclosure

Home

Car Audio & Electronics

Car Subwoofers

Empty Car Subwoofer Enclosures & Boxes

All Empty Car Subwoofer Boxes

NVX NE121S

NVX

Shop all NVX

by NVX

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

NVX NE121S Empty Single 12" Sealed Enclosure Image 1 — NVX NE121S Empty Single 12" Sealed Enclosure

NVX NE121S Empty Single 12" Sealed Enclosure Image 2 — NVX NE121S Empty Single 12" Sealed Enclosure

NVX NE121S Empty Single 12" Sealed Enclosure Image 3 — NVX NE121S Empty Single 12" Sealed Enclosure

NVX NE121S Empty Single 12" Sealed Enclosure Image 4 — NVX NE121S Empty Single 12" Sealed Enclosure

NVX NE121S Empty Single 12" Sealed Enclosure Image 5 — NVX NE121S Empty Single 12" Sealed Enclosure

NVX NE121S Empty Single 12" Sealed Enclosure Image 6 — NVX NE121S Empty Single 12" Sealed Enclosure

NVX NE121S Empty Single 12" Sealed Enclosure Image 7 — NVX NE121S Empty Single 12" Sealed Enclosure

NVX NE121S Empty Single 12" Sealed Enclosure Image 8 — NVX NE121S Empty Single 12" Sealed Enclosure

NVX NE121S Empty Single 12" Sealed Enclosure Image 9 — NVX NE121S Empty Single 12" Sealed Enclosure

NVX NE121S Empty Single 12" Sealed Enclosure-video

NVX NE121S Empty Single 12" Sealed Enclosure Image 1

NVX NE121S Empty Single 12" Sealed Enclosure Image 2

NVX NE121S Empty Single 12" Sealed Enclosure Image 3

NVX NE121S Empty Single 12" Sealed Enclosure Image 4

NVX NE121S Empty Single 12" Sealed Enclosure Image 5

Product highlights

• 12" Single Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 1.00 cubic feet
• Premium Black Carpet with Black NVX Logo

Learn more about the ne121s

Universal – fits most vehicles.

Similar items | Update vehicle | Vehicle store

List price $99.99

-10%

$89.99

with warranty

Starting at $16/mo

or 4 payments of $23

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

Other Ram 1500 owners bought

Axxess AXLOC-CH5

2-Channel 110W Line Output Converter with Gain Controller for select 2011-2025 vehicles from Ram, Dodge, Jeep with Non-Amplified Systems

-10.48%

$93.99

List price $104.99

Install New Speakers in select 1999-2026 vehicles from Dodge, Ram, Jeep

-37.52%

$9.99

List price $15.99

72-6514-12 main

Metra 72-6514-12 Speaker Harness for 1999-2026 Dodge, Ram, Jeep

Install New Speakers in select 1999-2026 vehicles from Dodge, Ram, Jeep

-14.30%

$11.99

List price $13.99

Metra 72-7902 Speaker Harness for 1990-2024 Ram, Dodge, Jeep

Install New Speakers in select 1990-2024 vehicles from Ram, Dodge, Jeep

-28.59%

$9.99

List price $13.99

iDataLink ADS-MIC1

Factory Microphone Retention Interface Module for select 2010-2024 vehicles from Ford, Subaru, Toyota (Requires ADS-MSR, MRR, or MR2 Module)

-20.00%

$79.99

List price $99.99

LVE-DOD-RAMQCCG3-D12S main

NVX Loaded BOOST Box - 2002-2018 Ram Quad, Crew Cab - LVE-DOD-RAMQCCG3-D12S

For select 2002-2018 1500 and Ram 1500 Quad and Crew Cab - Dual 12" 800W RMS Loaded BOOST Sealed Truck Enclosure

-18.98%

$349.99

List price $431.99

Scosche VWA4B Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 2000-2026 vehicles from Audi, Chevrolet, Volkswagen

-17.73%

$12.99

List price $15.79

Scosche CR1297DDB Dash Kit

Install a new Single-DIN or Double-DIN car stereo in select 2013-2015 1500 and 2500 and 3500 (Matte Black)

$39.99

LVE-DOD-RAMQCCG3-S10S main

NVX Loaded BOOST Box - 2002-2018 Ram Quad, Crew Cab - LVE-DOD-RAMQCCG3-S10S

For select 2002-2018 1500 and Ram 1500 Quad and Crew Cab - Single 10" 350W RMS Loaded BOOST Sealed Truck Enclosure

-20.64%

$199.99

List price $251.99

HRN-SR-CH3 main

iDataLink Maestro HRN-SR-CH3 Wiring Harness

Install a New Car Stereo in select 2013-2023 vehicles from Ram, Jeep, Fiat (Requires ADS-MSR module)

-21.06%

$29.99

List price $37.99

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 NE121S Empty Single 12

NVX NE121S Empty Single 12" Sealed Enclosure

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

40% off

NVX NE121S Empty Single 12" Sealed Enclosure

$89 ⁹⁹

NVX SDTK20

$49 ⁹⁹

Priced separately $139 ⁹⁸

Promo Savings of $20 ⁰⁰

Total price:

$119 ⁹⁸

Product Highlights

• 12" Single Sealed Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Internal box volume: 1.00 cubic feet
• Premium Black Carpet with Black NVX Logo

Description

Authorized dealer

Product Details:

Not compatible with NVX VC-Series Subwoofers
12" 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: 10-1/8"
Subwoofer cutout diameter: 11-7/32"
Internal box volume: 1.00 cubic feet
Dimensions: 13.00" D x 15.00" W x 15.00" H
Authorized Internet Dealer
1-year Sonic Electronix Warranty

Frequently Asked Questions (FAQ)

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

NE121S is better for audiophiles who want a tight but not forceful bass. Like other sealed enclosures, NE121S 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 NE121P instead.

What kind of subwoofer should be best paired with the NE121S?

Look for a 12” sub with a mounting depth that doesn’t exceed 10-1/8” and could fit within a 11-7/32” cutout diameter. It should operate within a 1 cubic feet volume for a tight, punchy bass without the woofer over-extending.

Will a high-excursion 12" sub with a massive magnet hit the back panel of NE121S?

Most likely not. For example, the NE121S has a generous mounting depth of up to 10-1/8". That’s enough clearance for even the beefiest competition-grade magnets to breathe without slamming against the rear wall.

As a metalhead, I want that tight, "kick-in-the-chest" bass for the drums. Can the NE121S handle those low frequencies?

Absolutely. Since it's a single sealed box, it provides the air spring needed for fast, accurate response. It ensures your bass notes stop and start instantly, making it perfect for double-bass pedals or fast rock drums.

Can I add more Polyfill to the NE121S?

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.

Other products for your Ram 1500

51KRDL7T102 main

Kicker KRDL7T10 (51KRDL7T102)

1000W RMS Loaded Dual 10" Sealed Truck Enclosure for select 2002-2024 vehicles from Ram, Dodge

-10.53%

$849.99

List price $949.99

DRQC20AC-TN main

MTX Audio Thunderform DRQC20AC-TN (Charcoal, Amplified)

select 2002-2018 vehicles from Ram, Dodge Amplified 2 10" 4 ohm Vehicle Specific Thunderform Subwoofer Enclosure

$899.95

51KTDL7T102 main

Kicker 51KTDL7T102

1000W RMS Loaded Dual 10" Sealed Truck Enclosure for select 2011-2024 2500 and 3500 and 1500 Classic

-10.53%

$849.99

List price $949.99

SB-D-QDRAM/10W3v3 main

JL Audio Stealthbox® SB-D-QDRAM/10W3v3 (Open Box, Like New)

Custom fit subwoofer enclosure for select 2002-2024 vehicles from Ram, Dodge

$1,249.99

DRQC20C-TN main

MTX Audio Thunderform DRQC20C-TN (Charcoal, Loaded)

Two 10" 4 ohms Loaded Vehicle Specific Thunderform Subwoofer Enclosure for select 2002-2018 vehicles from Ram, Dodge

$719.95

SB-D-QDRAMD/10TW1 main

JL Audio Stealthbox® SB-D-QDRAMD/10TW1

Custom fit subwoofer enclosure for select 2002-2024 vehicles from Ram, Dodge

$1,699.99

LVE-DOD-RAMQCCG3-D12S main

NVX Loaded BOOST Box - 2002-2018 Ram Quad, Crew Cab - LVE-DOD-RAMQCCG3-D12S

For select 2002-2018 1500 and Ram 1500 Quad and Crew Cab - Dual 12" 800W RMS Loaded BOOST Sealed Truck Enclosure

-18.98%

$349.99

List price $431.99

LVE-DOD-RAMQCCG3-S10S main

NVX Loaded BOOST Box - 2002-2018 Ram Quad, Crew Cab - LVE-DOD-RAMQCCG3-S10S

For select 2002-2018 1500 and Ram 1500 Quad and Crew Cab - Single 10" 350W RMS Loaded BOOST Sealed Truck Enclosure

-20.64%

$199.99

List price $251.99

51K5RDL7T102 main

Kicker 51K5RDL7T102

1000W RMS Loaded Dual 10" Sealed Truck Enclosure for select 2002-2024 vehicles from Ram, Dodge

-10.53%

$849.99

List price $949.99

LVE-DOD-RAMQCCG3-D10S main

NVX Loaded BOOST Box - 2002-2018 Ram Quad, Crew Cab - LVE-DOD-RAMQCCG3-D10S

For select 2002-2018 1500 and Ram 1500 Quad and Crew Cab - Dual 10" 700W RMS Loaded BOOST Sealed Truck Enclosure

-19.12%

$329.99

List price $407.99

Similar Products

Best selling similar products

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

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

Specifications & Details

Box/Enclosure specifications

Subwoofer Size

12"

Subwoofer Cutout Shape

Round / Circle

Box Type

Sealed

Number of Subwoofers

1

Box Style/Shape

Square/Rectangle

Cutout Diameter or Length

11-7/32"

Maximum Speaker Depth

10-1/8"

Total Box Volume

1.00 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

Customer Ratings & Reviews

NVX NE121S Empty Single 12

Overall rating distribution

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

Filter by Star Rating

1

2

3

4

5

Show only Verified Purchases

By feature average rating

Durability		5
Value		5
Features		5
Design		5
Usability		5

Customer Reviews

Sort by:

Loading...

Works great with my Kicker CWR124

By GrimGodiva on June 9, 2026 Checkmark Icon

Verified purchase

Report abuse

Add-ons

NVX XKIT42 - 4 Gauge Amp Kit

Pure Virgin Copper, 4 Gauge Amplifier Installation Kit

(125)

$109.99

List price $143.99

Belva BAK42 - 4 Gauge Amp Kit

CCA 4 Gauge Wiring Kit with RCA & Speaker Wire

(169)

$34.99

List price $59.99

8 Gauge - Stinger Amp Kit

Single amplifier 4000 Series complete installation kit.

(8)

$60.99

List price $119.00

NVX SDRLR1 Universal Roller Tool

Install your sound damping with the SDRLR1 tool

(127)

$10.99

List price $13.99

20 ft. of Dynamat Xtreme Trunk Kit

Keep your trunk from rattling and improve bass quality by using a sound dampening trunk kit.

(47)

$156.95

List price $187.44

NVX SDBP40 - 40 ft. (10% More Than Competition)

40 ft. Bulk Pack of Sound Dampening Material

(132)

$104.99

List price $119.99

Banana Clip Terminals

These high grade banana clips allow you to plug into your banana clip ready terminal for a secure connection.

(18)

$2.99

List price $6.99

Related Products

• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Enhanced Pressed Paper Cone
• High Roll Foam Surround
• Mount depth: 5.56"
• Sensitivity: 87 dB

$69.99

List price $83.99

• Peak Power: 1600 watts
• RMS Power: 800 watts
• Impedance: Dual 4 ohm
• Enhanced Pressed Paper Cone
• High Roll Foam Surround
• Mount depth: 6.5"
• Sensitivity: 85 dB

(4)

$149.99

List price $227.99

• Peak Power: 1600 watts
• RMS Power: 800 watts
• Impedance: Dual 2 ohm
• Enhanced Pressed Paper Cone
• High Roll Foam Surround
• Mount depth: 6.5"
• Sensitivity: 85 dB

(3)

$149.99

List price $227.99

Your Browsing History

Hamilton Beach 168321

1.5-QT Ice Cream Maker with Easy Lock Lid

$28.99

List price $34.99

BOYO Vision AVN701S

In-Dash DVD, CD, MP3 Receiver w/ 7" TFT LCD Monitor, Built-in GPS Navigation and Bluetooth

$439.99

List price $649.99

YOUR GARAGE Save up to 10 different vehicles in your garage

Vehicle
Store Delete

2023 BMW X3

2015 Ram 1500

Add vehicle Clear all vehicles

Where to find vehicle info

Are you sure you want to clear your garage?

This action cannot be undone. Confirm

Cancel

This page was not designed for products.

If you continue, you will be redirected to a category customized for your vehicle. Continue

Cancel

Shop your 2015 1500

Change vehicle | Shop without vehicle

Account

Login/Register Your orders Start a return Get order support

Shopping help

Help desk Frequently asked questions Coupons and promo codes Find car audio that fits my car Speaker fit guide Payments accepted Return policy Shipping policy

Company

About and contact us Why shop here? Business hours Career opportunities

Everyday heroes

Military discount Responder discount Student discount Teacher discount

Brand stores

Shop by brand

Alpine Cerwin-Vega Infinity JBL JL Audio JVC Kenwood Kicker NVX Pioneer Rockford Fosgate Sony

Useful links

Financing & Leasing Affiliate program Learning center Product video Testimonials Site map Privacy policy Accessibility California Prop 65 **Acima Disclosures

© 2000-2025 Sonic Electronix
Headquarters: 1100 W Broadway, Louisville 40203 | Mailing: 724 S 11th St. Bay 4, Louisville, KY 40210 Prices, specifications, and images are subject to change without notice. Select products on sale or discounted, coupons, or other promotions and bundles may not be combined. Sonic Electronix is not responsible for typographical or illustrative errors. All trademarks and trade names are the property of their respective trademark holders. Terms Of Use