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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)
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VMAX Series (20)
W1 v3 Series (20)
Apocalypse Series (19)
Power T1 Series (19)
SML Series (19)
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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)
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Select Series (4)
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Polk Audio MM1 Series (2)
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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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JL Audio 8W7AE-3

500W RMS 8" W7AE Series 3-ohm Car Subwoofer

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JL Audio 8W7AE-3

500W RMS 8" W7AE Series 3-ohm Car Subwoofer


• RMS Power: 500 watts
• Impedance: Single 3 ohm
• Polypropylene Cone
• Polyether Foam Surround
• Mount depth: 6.83"
• Sensitivity: 82.7 dB

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Rockford Fosgate Power T1 T1D415

2000W Peak (1000W RMS) 15" Power Series Dual 4-ohm Car Subwoofer

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Rockford Fosgate Power T1 T1D415

2000W Peak (1000W RMS) 15" Power Series Dual 4-ohm Car Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 4 ohm
• Kevlar Reinforced Pulp Paper Cone
• Santoprene Rubber Surround
• Mount depth: 8.39"
• Sensitivity: 87.5 dB

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Massive Audio SUMMOXL154

3000W Peak (1500W RMS) 15" Summo Series Dual 4-ohm Car Subwoofer

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Massive Audio SUMMOXL154

3000W Peak (1500W RMS) 15" Summo Series Dual 4-ohm Car Subwoofer

• Peak Power: 3000 watts
• RMS Power: 1500 watts
• Impedance: Dual 4 ohm
• Non-Pressed Paper Cone
• Foam Surround
• Mount depth: 8.58"
• Sensitivity: 93.8 dB

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Deaf Bonce Machete MF-15R D4

2400W Peak (1200W RMS) 15” Machete Series Dual 4-ohm Car Subwoofer

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Deaf Bonce Machete MF-15R D4

2400W Peak (1200W RMS) 15” Machete Series Dual 4-ohm Car Subwoofer

• Peak Power: 2400 watts
• RMS Power: 1200 watts
• Paper Cone
• Foam Surround
• Impedance: Dual 4 ohm
• Mount depth: 7.1"
• Sensitivity: 89.20 dB

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American Bass VFL Comp Signature 18" (VFLCOMP-1822)

10000W Peak (5000W RMS) 18" VFL Competition Series Dual 2-ohm Subwoofer

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American Bass VFL Comp Signature 18" (VFLCOMP-1822)

10000W Peak (5000W RMS) 18" VFL Competition Series Dual 2-ohm Subwoofer

• Peak Power: 10000 watts
• RMS Power: 5000 watts
• Impedance: Dual 2 ohm
• Kevlar Fiber-Enforced Non-Pressed Paper cone
• High Roll Foam surround
• Mount depth: 11"

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Rockford Fosgate Power T2 T2S2-13

4000W Peak (2000W RMS) 13" Power Series Single 2-ohm Car Subwoofer

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Rockford Fosgate Power T2 T2S2-13

4000W Peak (2000W RMS) 13" Power Series Single 2-ohm Car Subwoofer

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Single 2 ohm
• Glass Fiber Cone
• Injection molded foam Surround
• Mount depth: 9.7"
• Sensitivity: 87 dB

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Kicker CDF104 (48CDF104)

300W Peak (150W RMS) Loaded Single 10" Downward Firing Sealed Subwoofer Enclosure

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Kicker CDF104 (48CDF104)

300W Peak (150W RMS) Loaded Single 10" Downward Firing Sealed Subwoofer Enclosure

• Sealed enclosure with 1 10" Comp Series Subwoofer
• 75-150 watts RMS Power Rating
• Final Impedance: 4-ohm
• Dimensions: 20 11/16" L x 7 1/16" H x 12 1/4" W

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JBL Stage 1200D

2000W Peak (1000W RMS) Loaded Dual 12" Vented Enclosure

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JBL Stage 1200D

2000W Peak (1000W RMS) Loaded Dual 12" Vented Enclosure

• Ported enclosure with 2 12" Stage Series Subwoofer
• 1000 watts RMS (500 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 30-1/8" L x 15" H x 13-11/16" W

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Sundown Audio SML-10 D4 10" (SML10D4)

1200W Peak (600W RMS) 10" SML Series Dual 4-ohm Shallow Car Subwoofer (SW-SML10D4)

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Sundown Audio SML-10 D4 10" (SML10D4)

1200W Peak (600W RMS) 10" SML Series Dual 4-ohm Shallow Car Subwoofer (SW-SML10D4)

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Pressed Paper cone
• Pressed Foam surround
• Mount depth: 3.78"
• Sensitivity: 85.8 dB

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Kicker TCWRT122 (48TCWRT122)

1000W Peak (500W RMS) Loaded Single 12" Sealed Truck Enclosure with Passive Radiator

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Kicker TCWRT122 (48TCWRT122)

1000W Peak (500W RMS) Loaded Single 12" Sealed Truck Enclosure with Passive Radiator

• Sealed truck enclosure with 1 12" CompRT Series Subwoofer
• 500 watts RMS (1000 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 27" L x 13-1/2" H x 3-1/2" W x 7" W2

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Kicker DCWC122 (50DCWC122)

1200W Peak (600W RMS) Loaded Dual 12" Vented Subwoofer Enclosure

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Kicker DCWC122 (50DCWC122)

1200W Peak (600W RMS) Loaded Dual 12" Vented Subwoofer Enclosure

• Ported enclosure with 2 12" CompC Series Subwoofer
• 600 watts RMS (1200 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 31-7/8" L x 16" H x 14" W x 17-1/4" W2

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Cerwin-Vega V8DV4

750W Peak (250W RMS) 8" Vega Series Dual 4-ohm Subwoofer

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Cerwin-Vega V8DV4

750W Peak (250W RMS) 8" Vega Series Dual 4-ohm Subwoofer

• Peak Power: 2400 watts
• RMS Power: 800 watts
• Impedance: Dual 4 ohm
• Carbon Fiber Polypropylene Cone
• Santoprene Rubber Surround
• Mount depth: 4.4"
• Sensitivity: 82 dB

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Cerwin-Vega V8DV2

2400W Peak (800W RMS) 8" Vega Series Dual 2-ohm Subwoofer

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Cerwin-Vega V8DV2

2400W Peak (800W RMS) 8" Vega Series Dual 2-ohm Subwoofer

• Peak Power: 2400 watts
• RMS Power: 800 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Polypropylene Cone
• Santoprene Rubber Surround
• Mount depth: 5.43"
• Sensitivity: 85 dB

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Diamond Audio DPST12

600W Peak (300W RMS) Loaded 11" Spare Tire Passive Subwoofer Enclosure

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Diamond Audio DPST12

600W Peak (300W RMS) Loaded 11" Spare Tire Passive Subwoofer Enclosure

• Sealed enclosure with 1 11" DMD Series Subwoofer
• 300 watts RMS (600 watts Peak)
• Final Impedance: 4-ohm
• Dimensions: 14.2" L x 5.9" W

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• Sealed enclosure with 1 11" DMD Series Subwoofer
• 300 watts RMS (600 watts Peak)
• Final Impedance: 4-ohm
• Dimensions: 14.2" L x 5.9" W

Kicker CWQ152 (51CWQ152)

2400W Peak (1200W RMS) 15" CompQ Series Dual 2-ohm Subwoofer

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Kicker CWQ152 (51CWQ152)

2400W Peak (1200W RMS) 15" CompQ Series Dual 2-ohm Subwoofer

• Peak Power: 2400 watts
• RMS Power: 1200 watts
• Impedance: Dual 2 ohm
• SoloKon Polypropylene Cone
• Blue-stitched Santoprene Rubber Surround
• Mount depth: 8-15/1"
• Sensitivity: 88 dB

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Sundown Audio X-18 v.3 D2 18" (X12V3D2)

5000W Peak (2500W RMS) 18" X Series Dual 2-ohm Car Subwoofer (SW-XV318D2)

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Sundown Audio X-18 v.3 D2 18" (X12V3D2)

5000W Peak (2500W RMS) 18" X Series Dual 2-ohm Car Subwoofer (SW-XV318D2)

• Peak Power: 5000 watts
• RMS Power: 2500 watts
• Impedance: Dual 2 ohm
• Pressed Paper Cone
• Mega Roll V2 Surround
• Mount depth: 13.6"
• Sensitivity: 87.6 dB

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List price $1019.99
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Bazooka MBT1014 (Open Box, Great)

150W Peak Loaded Single 10" Non-Amplified Ported Subwoofer Bass Tube Enclosure

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Bazooka MBT1014 (Open Box, Great)

150W Peak Loaded Single 10" Non-Amplified Ported Subwoofer Bass Tube Enclosure

• Ported enclosure with 1 10" BT Series Subwoofer
• 200 watts Peak
• Final Impedance: 4-ohm
• Dimensions: 20.75" L x 12.2" H x 10.3" W

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• Ported enclosure with 1 10" BT Series Subwoofer
• 200 watts Peak
• Final Impedance: 4-ohm
• Dimensions: 20.75" L x 12.2" H x 10.3" W

Cerwin-Vega CVP10S4

450W Peak (150W RMS) 10" CVP Series Single 4-ohm Subwoofer

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Cerwin-Vega CVP10S4

450W Peak (150W RMS) 10" CVP Series Single 4-ohm Subwoofer

• Peak Power: 450 watts
• RMS Power: 150 watts
• Impedance: Single 4 ohm
• Polypropylene Cone
• Treated Double Stitched Foam Surround
• Mount depth: 5.27"
• Sensitivity: 87.1 dB

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$69.99

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Kicker CWRT672 (48CWRT672)

300W Peak (150W RMS) 6.75” CompRT Series Dual 2-ohm Shallow Car Subwoofer

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Kicker CWRT672 (48CWRT672)

300W Peak (150W RMS) 6.75” CompRT Series Dual 2-ohm Shallow Car Subwoofer

• Peak Power: 300 watts
• RMS Power: 150 watts
• Impedance: Dual 2 ohm
• UV-Resistant Polypropylene Cone
• UV-resistant Santoprene Surround
• Mount depth: 2-3/4"
• Sensitivity: 82.6 dB

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Kicker CVX104 (50CVX104)

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

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Kicker CVX104 (50CVX104)

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

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Polypropylene cone
• Ribbed Santoprene surround
• Mount depth: 5-15/16"
• Sensitivity: 85.7 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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