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2021 Jeep Gladiator

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Subwoofers and enclosures, specifically designed for your 2021 Gladiator, as well as universal fit solutions

Overview Upgrade your Stereo Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Add Remote Start Dads & Grads Sale

Subwoofers and Boxes for 2021 Jeep Gladiator

A subwoofer that works with, or is designed for, your 2021 Jeep Gladiator will add bass, clarity and depth to your music and system. A quality subwoofer will give realism and an overall rich, complete sound that you otherwise would not get with a factory car sound system.

Custom-fit subwoofer box

Custom-fit Subwoofer Boxes & Enclosures

Get a sub box designed specifically for your Gladiator.

Subwoofer bass packages

Universal Subwoofer Bass Packages

These packages include an amp, sub(s), an enclosure and amplifier wiring. They should fit your Jeep Gladiator, but verify your trunk/rear vehicle area.

Universal Subwoofers

Universal Subwoofers

These sub(s) are perfect for adding to a empty box or custom built enclosure. They should work with your Jeep Gladiator, but verify your trunk/rear vehicle area.

Universal-fit loaded and powered sub boxes

Universal-fit Loaded Subwoofer Boxes

These boxes include sub(s) and some include an amp. They should fit your Jeep Gladiator, but verify your trunk/rear vehicle area.

Universal-fit empty unloaded sub boxes

Empty Universal-fit Sub Box Enclosures

These boxes are ready for you to add a sub and amp. They should fit your ride, but verify your trunk/rear vehicle area.

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RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
S Series (16)
W3 v3 Series (11)
X Series (10)
Apocalypse Series (9)
SoloX Series (9)
Club Series (8)
M Series (8)
Power Series (8)
Reference Series (8)
Solo-Baric L7T Series (8)
Spike Series (8)
TW3 Shallow Mount Series (8)
VEGA Series (8)
Z Series (8)
HED Series (7)
Mille Pro Series (7)
Nightshade (NS) Series (7)
Punch Series (7)
SA Series (7)
CompQ Series (6)
CompVX Series (6)
Hifonics Elite Series (6)
IXS Shallow Series (6)
R Series (6)
R2 Series (6)
Solo-Baric L7S Series (6)
VMAX Series (6)
SA Classic Series (5)
Space Series (5)
Stage Series (5)
W1 v3 Series (5)
ZXI Series (5)
55 Series (4)
Diamond Elite Series (4)
DMD Series (4)
Hippo Series (4)
Prime Series (4)
SoloXS L7XS Series (4)
SQ Series (4)
T1 Slim Series (4)
TW1 Series (4)
W6 v3 Series (4)
W7 Anniversary Edition Series (4)
W7 Series (4)
A Series (3)
Cento Series (3)
CompRT Series (3)
DES Series (3)
Excelon Reference Series (3)
EXL Series (3)
Gen-X (3)
SWT Series (3)
TW5 Shallow Mount Series (3)
VS Series (3)
Dieci Series (2)
Discus Series (2)
DMD-SH Series (2)
E-Series (2)
EPICX Series (2)
eXcelon Series (2)
HCCA Series (2)
Mille Legend Series (2)
Power T1 Series (2)
Punch P3 Shallow Mount Series (2)
R-Series (2)
Select Series (2)
Solo-Baric L7 Series (2)
SPL Show Series (2)
SRW Series (2)
Status Series (2)
Summo Series (2)
TS Series (2)
VC Series (2)
W0 v3 Series (2)
XS-Series (2)
ZR Series (2)
75 Series (1)
Arena Series (1)
Atom Series (1)
C6 Series (1)
CompVR Series (1)
D Series (1)
DBX Series (1)
GTR Series (1)
GTS Series (1)
Hooligan Series (1)
LCS Series (1)
M6 Series (1)
MicroSub Series (1)
Power T2 Series (1)
Power T3 Series (1)
Punch P3 Series (1)
S65 Series (1)
Stadium Series (1)
Stealthbox Series (1)
StowAway Series (1)
Stroker Series (1)
Type-R Series (1)
U Series (1)
Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.
Top-Mount Depth (Mounting Depth)
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Minimum Sealed Box Volume
This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
Maximum Sealed Box Volume
This value indicates the maximum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
  Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
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DS18 EBM-FFPGLAD-4X8

Empty Quad 8" Vented Underseat Enclosure for select 2020-2024 Gladiator

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DS18 EBM-FFPGLAD-4X8

Empty Quad 8" Vented Underseat Enclosure for select 2020-2024 Gladiator

• 8" Quad Ported Subwoofer Enclosure
• Medium Density Fiberboard (MDF) construction
• Custom fit front-firing under seat construction
• Integrates seamlessly to truck's cabin
• Total box volume: 4 cubic feet

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• 8" Quad Ported Subwoofer Enclosure
• Medium Density Fiberboard (MDF) construction
• Custom fit front-firing under seat construction
• Integrates seamlessly to truck's cabin
• Total box volume: 4 cubic feet

Alpine R2-DB8V-TRK

2000W Peak (700W RMS) Loaded Dual 8" R-Series Vented Truck Enclosure for select 2007-2024 vehicles from Ford, Jeep, Ram

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Alpine R2-DB8V-TRK

2000W Peak (700W RMS) Loaded Dual 8" R-Series Vented Truck Enclosure for select 2007-2024 vehicles from Ford, Jeep, Ram

• Ported truck enclosure with 2 8" R Series Subwoofer
• 350 watts each RMS (1000 watts each Peak)
• Final Impedance: 2-ohm
• Dimensions: 13-3/4" L x 8-3/4" H x 40" W x 40" W2

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Alpine S2-DB8V-TRK

600W Peak (300W RMS) Loaded Dual 8" Vented Enclosure for select 2007-2024 vehicles from Jeep, GMC, Ford

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Alpine S2-DB8V-TRK

600W Peak (300W RMS) Loaded Dual 8" Vented Enclosure for select 2007-2024 vehicles from Jeep, GMC, Ford

• Ported enclosure with 2 8" S Series Subwoofer
• 300 watts RMS (600 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 40-51" L x 8.75" H x 13.75" W

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DS18 JT-S64

Empty Quad 6.5" Sealed Underseat Enclosure for select 2020-2026 Gladiator

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DS18 JT-S64

Empty Quad 6.5" Sealed Underseat Enclosure for select 2020-2026 Gladiator

• 6.5" Quad Sealed Under Seat Subwoofer Enclosure for select 2020-2026 Gladiator
• Medium Density Fiberboard (MDF) construction
• Total box volume: 1.3 cubic feet
• Mounting bracket and hardware included
• Built-in RGB LED lights in DS18 logos badge

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DS18 JT-S84LD

3600W Peak (1800W RMS) Loaded Quad 8" Sealed Enclosure with Digital LED Lights for select 2020-2026 Gladiator

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DS18 JT-S84LD

3600W Peak (1800W RMS) Loaded Quad 8" Sealed Enclosure with Digital LED Lights for select 2020-2026 Gladiator

• Sealed enclosure with 4 8" Subwoofer
• 1800 watts RMS (3600 watts Peak)
• Final Impedance: 1-ohm
• Dimensions: 44.3" L x 7.2" H (front) / 5.8" H (rear) x 11.2" W

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JL Audio Stealthbox® SBX-J-JTGLAD/10TW1

Custom Fit 10" Subwoofer Enclosure for select 2020-2026 Gladiator

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JL Audio Stealthbox® SBX-J-JTGLAD/10TW1

Custom Fit 10" Subwoofer Enclosure for select 2020-2026 Gladiator

• Sealed enclosure with 2 10" Stealthbox Series Subwoofer
• 300 watts RMS each
• Final Impedance: 2-ohm

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• Sealed enclosure with 2 10" Stealthbox Series Subwoofer
• 300 watts RMS each
• Final Impedance: 2-ohm

AudioControl TX-JTD8

1000W RMS Loaded Dual 8" Vented Enclosure for select 2020-2024 Gladiator

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AudioControl TX-JTD8

1000W RMS Loaded Dual 8" Vented Enclosure for select 2020-2024 Gladiator

• Ported under seat enclosure with 2 8" Subwoofer
• Compatible with select 2020-2024 Gladiator
• 1000 watts RMS pair / 500 watts RMS each
• Final Impedance: 4-ohm
• Dimensions: 48" L x 7.5" H x 10.5" W

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MB Quart MBQJT-SUB-1

Custom underseat enclosure with two 8" subs fits select 2020-2026 Gladiator

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MB Quart MBQJT-SUB-1

Custom underseat enclosure with two 8" subs fits select 2020-2026 Gladiator

• 400 Watt Jeep® Gladiator (JT) Tuned Dual Subwoofers System
• 8" Series Subwoofer(s)
• High Density Polyethylene (HDPE) custom-fit enclosure
• Enclosure Dimensions: 23.42" L x 16.06" W x 15.35" H

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NVX SQW104

1200W Peak (600W RMS) 10" SQ-Series Dual 4-ohm Shallow-Mount Car Subwoofer

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NVX SQW104

1200W Peak (600W RMS) 10" SQ-Series Dual 4-ohm Shallow-Mount Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 3.23"
• Sensitivity: 83 dB

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• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 3.23"
• Sensitivity: 83 dB

NVX SQW124

1200W Peak (600W RMS) 12" SQ-Series Dual 4-ohm Shallow-Mount Car Subwoofer

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NVX SQW124

1200W Peak (600W RMS) 12" SQ-Series Dual 4-ohm Shallow-Mount Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 3.51"
• Sensitivity: 84 dB

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List price $359.99
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• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 3.51"
• Sensitivity: 84 dB

JL Audio 12W6v3-D4

600W RMS 12" W6v3 Series Dual 4-ohm Car Subwoofer

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JL Audio 12W6v3-D4

600W RMS 12" W6v3 Series Dual 4-ohm Car Subwoofer

• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Mineral-Filled Polypropylene Cone
• Butyl Rubber Surround
• Mount depth: 7.52"
• Sensitivity: 85.4 dB

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JL Audio 10TW3-D4

400W RMS 10" TW3 Series Dual 4-ohm Shallow Subwoofer

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JL Audio 10TW3-D4

400W RMS 10" TW3 Series Dual 4-ohm Shallow Subwoofer

• RMS Power: 400 watts
• Polymer/Mica Composite Cone
• Rubber Surround
• Impedance: Dual 4 ohm
• Mount depth: 3.25"
• Sensitivity: 82.10 dB

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JL Audio 10W0v3-4

300W RMS 10" W0v3 Series Single 4-ohm Car Subwoofer

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JL Audio 10W0v3-4

300W RMS 10" W0v3 Series Single 4-ohm Car Subwoofer

• RMS Power: 300 watts
• Impedance: Single 4 ohm
• Mount depth: 4.90"
• Sensitivity: 84.07 dB

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Cerwin Vega HS102D

800W Peak (200W RMS) 10" HED Series Dual 2-ohm Shallow Subwoofer

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Cerwin Vega HS102D

800W Peak (200W RMS) 10" HED Series Dual 2-ohm Shallow Subwoofer

• Peak Power: 800 watts
• RMS Power: 200 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• Treated Foam Surround
• Mount depth: 3.54"
• Sensitivity: 83.1 dB

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AudioControl SPK-10S2

700W Peak (500W RMS) 10" Spike Series Single 2-ohm High-Performance Car Subwoofer

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AudioControl SPK-10S2

700W Peak (500W RMS) 10" Spike Series Single 2-ohm High-Performance Car Subwoofer

• Peak Power: 700 watts
• RMS Power: 500 watts
• Impedance: Single 2 ohm
• Paper Fiber with Mica Coating Cone
• Rubber Surround
• Mount depth: 5.32"
• Sensitivity: 82.2488 dB

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JL Audio M6-8IB-S-GwGw-4

200W RMS 8" M6 Series Single 4-ohm Marine Subwoofer with Gloss White Sport Grille

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JL Audio M6-8IB-S-GwGw-4

200W RMS 8" M6 Series Single 4-ohm Marine Subwoofer with Gloss White Sport Grille

• RMS Power: 200 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene Cone
• Synthetic Rubber Surround
• Mount depth: 5.07"
• Sensitivity: 86.8 dB

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AudioControl SPK-10S4

700W RMS 10" Spike Series Single 4-ohm High-Performance Car Subwoofer

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AudioControl SPK-10S4

700W RMS 10" Spike Series Single 4-ohm High-Performance Car Subwoofer

• RMS Power: 700 watts
• Impedance: Single 4 ohm
• Paper Fiber with Mica Coating Cone
• Rubber Surround
• Mount depth: 5.32"
• Sensitivity: 83.7199 dB

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Sundown Audio M-12 D2 12" (M12D2)

4000W Peak (2000W RMS) 12" M Series Dual 2-ohm Car Subwoofer (SW-M12D2)

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Sundown Audio M-12 D2 12" (M12D2)

4000W Peak (2000W RMS) 12" M Series Dual 2-ohm Car Subwoofer (SW-M12D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• High Roll Foam Surround
• Mount depth: 10.88"
• Sensitivity: 80.6 dB

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JBL Stage 122 (JBLSUBST122AM)

1000W Peak (250W RMS) 12" Stage Series Single 4-ohm Car Subwoofer

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JBL Stage 122 (JBLSUBST122AM)

1000W Peak (250W RMS) 12" Stage Series Single 4-ohm Car Subwoofer

• Peak Power: 1000 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 6"
• Sensitivity: 91 dB

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JL Audio 12TW3-D4

400W RMS 12" TW3 Series Dual 4-ohm Shallow Subwoofer

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JL Audio 12TW3-D4

400W RMS 12" TW3 Series Dual 4-ohm Shallow Subwoofer

• RMS Power: 400 watts
• Impedance: Dual 4 ohm
• Mica Injected Polypropylene - MIPP Cone
• Rubber Surround
• Mount depth: 3.5"
• Sensitivity: 84.11 dB

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    FAQ for Subwoofer and Sub Box Upgrades in 2021 Gladiator

    Q: Can I upgrade or change the Subwoofer and Sub Box Upgrades in 2021 Jeep Gladiator?

    A: Yes this page includes all the best Subwoofer and Sub Box Upgrades that work in your Gladiator.

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    Shop your 2021 Gladiator
    Why Use a Vehicle Fit Guide?
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    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.

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