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1977 Jeep J20

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Subwoofers and enclosures, specifically designed for your 1977 J20, as well as universal fit solutions

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Subwoofers and Boxes for 1977 Jeep J20

A subwoofer that works with, or is designed for, your 1977 Jeep J20 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.

Subwoofer bass packages

Universal Subwoofer Bass Packages

These packages include an amp, sub(s), an enclosure and amplifier wiring. They should fit your Jeep J20, 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 J20, 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 J20, 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.
Punch Series (72)
CompRT Series (43)
S Series (43)
W3 v3 Series (40)
CompR Series (38)
CompC Series (35)
SA Series (35)
Prime Series (30)
E-Series (29)
CompVR Series (28)
X Series (28)
CompVX Series (27)
Y-Series (27)
Prime R2 Series (25)
R2 Series (24)
HED Series (23)
VC Series (23)
CompQ Series (22)
Power Series (22)
SoloX Series (21)
Comp Series (20)
CompVT Series (20)
VMAX Series (20)
W1 v3 Series (20)
Apocalypse Series (19)
Power T1 Series (19)
SML Series (19)
Solo-Baric L7T Series (19)
VEGA Series (19)
U Series (18)
Z Series (18)
W0 v3 Series (17)
Reference Series (16)
TW3 Shallow Mount Series (16)
Type-R Series (16)
N-Series (15)
Punch P3 Series (15)
Solo-Baric L7S Series (15)
35 Series (14)
NEO Series (14)
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Hifonics Elite Series (7)
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MicroSub Series (4)
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Select Series (4)
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KM Series (2)
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Mille Legend Series (2)
Polk Audio MM1 Series (2)
Power T2 Series (2)
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SL Series (2)
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S65 Series (1)
SPL Monster Series (1)
Tarantula T5 Series (1)
TKO Series (1)
UFO Series (1)
W0 v2 Series (1)
XD Series (1)
XO 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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Rockford Fosgate Power T2 T2S2-16

5000W Peak (2500W RMS) 16" Power Series Single 2-ohm Car Subwoofer

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Rockford Fosgate Power T2 T2S2-16

5000W Peak (2500W RMS) 16" Power Series Single 2-ohm Car Subwoofer

• Peak Power: 5000 watts
• RMS Power: 2500 watts
• Impedance: Single 2 ohm
• Glass Fiber Cone
• Injection molded foam Surround
• Mount depth: 10.47"
• Sensitivity: 90 dB

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Kicker TRTP102 (48TRTP102)

800W Peak (400W RMS) Loaded Dual 10" Sealed Truck Enclosure

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Kicker TRTP102 (48TRTP102)

800W Peak (400W RMS) Loaded Dual 10" Sealed Truck Enclosure

• Sealed truck enclosure with 2 10" CompRT Series Subwoofer
• 250-400 watts RMS Power Rating
• Final Impedance: 2-ohm
• Dimensions: 25 5/8" L x 5 5/8" H x 13 1/4" W

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JL Audio 12TW3-D8

400W RMS 12" TW3 Series Dual 8-ohm Shallow Subwoofer

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JL Audio 12TW3-D8

400W RMS 12" TW3 Series Dual 8-ohm Shallow Subwoofer

• RMS Power: 400 watts
• Impedance: Dual 8 ohm
• Polypropylene-Mica Cone
• Rubber Surround
• Mount depth: 3.50"
• Sensitivity: 84.23 dB

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Alpine RS-W10D2

1800W Peak (600W RMS) 10” R-Series Dual 2-ohm Shallow Car Subwoofer

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Alpine RS-W10D2

1800W Peak (600W RMS) 10” R-Series Dual 2-ohm Shallow Car Subwoofer

• Peak Power: 1800 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• Butyl Rubber Surround
• Mount depth: 3.25"
• Sensitivity: 79 dB

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Rockford Fosgate Prime R2 R2SD2-10

400W Peak (200W RMS) 10" Prime Series Dual 2-ohm Shallow Car Subwoofer

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Rockford Fosgate Prime R2 R2SD2-10

400W Peak (200W RMS) 10" Prime Series Dual 2-ohm Shallow Car Subwoofer

• Peak Power: 400 watts
• RMS Power: 200 watts
• Impedance: Dual 2 ohm
• Mica Injected Polypropylene - MIPP Cone
• Foam Surround
• Mount depth: 3.417"
• Sensitivity: 82 dB

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Massive Audio Hippo H84X

1600W Peak (800W RMS) 8" Hippo Series Dual 4-ohm Subwoofer

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Massive Audio Hippo H84X

1600W Peak (800W RMS) 8" Hippo Series Dual 4-ohm Subwoofer

• Peak Power: 1600 watts
• RMS Power: 800 watts
• Impedance: Dual 4 ohm
• Kevlar Fiber-Enforced Non-Pressed Paper Cone
• Tall and narrow Foam Surround
• Mount depth: 5.51"
• Sensitivity: 84 dB

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Rockford Fosgate Punch P2 P2D4-12

800W Peak (400W RMS) 12" Punch Series Dual 4-ohm Car Subwoofer

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Rockford Fosgate Punch P2 P2D4-12

800W Peak (400W RMS) 12" Punch Series Dual 4-ohm Car Subwoofer

• Peak Power: 800 watts
• RMS Power: 400 watts
• Impedance: Dual 4 ohm
• Kevlar Reinforced Pulp Paper Cone
• Santoprene Rubber Surround
• Mount depth: 6.40"
• Sensitivity: 86 dB

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Atrend 10SPLDV

Empty Dual 10" SPL Vented Subwoofer Enclosure

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Atrend 10SPLDV

Empty Dual 10" SPL Vented Subwoofer Enclosure

• 10" Dual SPL Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 2.7 cubic feet

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Deaf Bonce Apocalypse DB-SA252 D2

2000W Peak (1000W RMS) 12” Apocalypse Series Dual 2-ohm Car Subwoofer

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Deaf Bonce Apocalypse DB-SA252 D2

2000W Peak (1000W RMS) 12” Apocalypse Series Dual 2-ohm Car Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 2 ohm
• Pressed Paper Cone
• Foam Surround
• Mount depth: 6.6"
• Sensitivity: 85 dB

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Alpine S2-W10D4

1800W Peak (600W RMS) 10" S-Series Dual 4-ohm Car Subwoofer

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Alpine S2-W10D4

1800W Peak (600W RMS) 10" S-Series Dual 4-ohm Car Subwoofer

• Peak Power: 1800 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Carbon Fiber Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 4.54"
• Sensitivity: 84.9 dB

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JL Audio 13TW5v2-4

600W RMS 13.5" TW5v2 Series Single 4-ohm Shallow Car Subwoofer

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JL Audio 13TW5v2-4

600W RMS 13.5" TW5v2 Series Single 4-ohm Shallow Car Subwoofer

• RMS Power: 600 watts
• Impedance: Single 4 ohm
• Mica Injected Polypropylene - MIPP Cone
• Santoprene Rubber Surround
• Mount depth: 2.625"
• Sensitivity: 85.63 dB

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JL Audio PowerWedge TW3 CS110TG-TW3

400W RMS Loaded Single 10" Sealed Truck Enclosure

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JL Audio PowerWedge TW3 CS110TG-TW3

400W RMS Loaded Single 10" Sealed Truck Enclosure

• Sealed truck enclosure with 1 10" TW3 Shallow Mount Series Subwoofer
• 400 watts RMS
• Final Impedance: 2-ohm
• Dimensions: 19" L x 12.375" H x 4.35" W x 6.25" W2

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Rockford Fosgate Power T1D210 + Belva MDFS10 Subwoofer Enclosure

600W 10" Power T1 Series Dual 2 ohm Subwoofer + 10" Sealed Enclosure

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Rockford Fosgate Power T1D210 + Belva MDFS10 Subwoofer Enclosure

600W 10" Power T1 Series Dual 2 ohm Subwoofer + 10" Sealed Enclosure

• 1200W Peak
• 600W RMS
• High Excursion TPE (Thermo-Plastic Elastomer) Surround
• SWIFT Impedance Selection
• Dual Opposing Spiders
• Parabolic Triangular Cone Geometry

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Kicker CWQ104 (51CWQ104)

1600W Peak (800W RMS) 10" CompQ Series Dual 4-ohm Subwoofer

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Kicker CWQ104 (51CWQ104)

1600W Peak (800W RMS) 10" CompQ Series Dual 4-ohm Subwoofer

• Peak Power: 1600 watts
• RMS Power: 800 watts
• Impedance: Dual 4 ohm
• SoloKon Polypropylene Cone
• Blue-stitched Santoprene Rubber Surround
• Mount depth: 6-3/8"
• Sensitivity: 84.5 dB

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DS18 ZXI8.2D

1200W Peak (600W RMS) 8" ZXI Series High Excursion Dual 2-ohm Subwoofer

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DS18 ZXI8.2D

1200W Peak (600W RMS) 8" ZXI Series High Excursion Dual 2-ohm Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Non-Pressed Paper Cone
• Foam Surround
• Mount depth: 5.51"
• Sensitivity: 86 dB

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Alpine SBT-S10V

1000W Peak (350W RMS) Loaded Single 10" Vented Truck Enclosure

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Alpine SBT-S10V

1000W Peak (350W RMS) Loaded Single 10" Vented Truck Enclosure

• Ported truck enclosure with 1 10" SWT Series Subwoofer
• 350 watts RMS (1000 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 21 7/8" L x 15 1/2" H x 7 1/2" W x 4 1/4" W2

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Atrend 12RPD

Empty Dual 12" Vented Enclosure for Rockford Fosgate P2 and P3 Series Subwoofers

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Atrend 12RPD

Empty Dual 12" Vented Enclosure for Rockford Fosgate P2 and P3 Series Subwoofers

• 12" Dual Ported Subwoofer Enclosure
• Fits Rockford Fosgate P2 and P3 series subwoofers
• 3/4" Medium Density Fiberboard (MDF) construction
• Miter and Dado construction
• Premium carpet finish
• Silver spring loaded terminal cups
• Glued and braced with fasteners
• Total box volume: 3.4 cubic feet

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Wet Sounds WS-SUB 650 ES

150W Peak (75W RMS) Loaded Single 6.5" Vented Marine and Powersports Enclosure

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Wet Sounds WS-SUB 650 ES

150W Peak (75W RMS) Loaded Single 6.5" Vented Marine and Powersports Enclosure

• Ported enclosure with 1 6.5" Subwoofer
• 75 watts RMS (150 watts Peak)
• Final Impedance: 4-ohm

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DS18 IXS12.4S (Open Box, Great)

1600W Peak (800W RMS) 12" IXS Series Single 4-ohm Shallow Car Subwoofer

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DS18 IXS12.4S (Open Box, Great)

1600W Peak (800W RMS) 12" IXS Series Single 4-ohm Shallow Car Subwoofer

• Peak Power: 1600 watts
• RMS Power: 800 watts
• Paper Cone
• Rubber Surround
• Impedance: Single 4 ohm
• Mount depth: 4.33"
• Sensitivity: 85.1 dB

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• Peak Power: 1600 watts
• RMS Power: 800 watts
• Paper Cone
• Rubber Surround
• Impedance: Single 4 ohm
• Mount depth: 4.33"
• Sensitivity: 85.1 dB

JL Audio 12W7AE-3

1000W RMS 12" W7AE Series Single 3-ohm Car Subwoofer

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JL Audio 12W7AE-3

1000W RMS 12" W7AE Series Single 3-ohm Car Subwoofer

• RMS Power: 1000 watts
• Impedance: Single 3 ohm
• Polypropylene Cone
• Polyester Foam Surround
• Mount depth: 9.50"
• Sensitivity: 86.2 dB

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    FAQ for Subwoofer and Sub Box Upgrades in 1977 J20

    Q: Can I upgrade or change the Subwoofer and Sub Box Upgrades in 1977 Jeep J20?

    A: Yes this page includes all the best Subwoofer and Sub Box Upgrades that work in your J20.

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