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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)
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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)
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Hifonics Elite Series (7)
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HED Slim Series (4)
King Series (4)
KM Subwoofer Series (4)
MicroSub Series (4)
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Select Series (4)
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Earthquake DBXI Series (2)
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ES Series (2)
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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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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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Kicker L7T124 (46L7T124)

1200W Peak (600W RMS) 12" L7T Solo-Baric Series Dual 4-ohm Shallow Car Subwoofer

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Kicker L7T124 (46L7T124)

1200W Peak (600W RMS) 12" L7T Solo-Baric Series Dual 4-ohm Shallow Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• SoloKon Polypropylene Cone
• Ribbed Santoprene Surround
• Mount depth: 4-1/8"
• Sensitivity: 86.54 dB

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Rockford Fosgate Power T1 T1S2-10S

1000W Peak (500W RMS) 10" T1 Slim Series Single 2-ohm Shallow Subwoofer for Sealed Enclosures

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Rockford Fosgate Power T1 T1S2-10S

1000W Peak (500W RMS) 10" T1 Slim Series Single 2-ohm Shallow Subwoofer for Sealed Enclosures

• Peak Power: 1000 watts
• RMS Power: 500 watts
• Impedance: Single 2 ohm
• Optimized for sealed enclosures
• Carbon Fiber/PMI/Glass Fiber Cone
• Synthetic organic polymer Surround
• Mount depth: 3.01"
• Sensitivity: 82 dB

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Kicker C84 (43C84)

200W Peak (100W RMS) 8" Comp Series Single 4-ohm Subwoofer

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Kicker C84 (43C84)

200W Peak (100W RMS) 8" Comp Series Single 4-ohm Subwoofer

• Peak Power: 200 watts
• RMS Power: 100 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene Cone
• UV-Resistant Rubber Surround
• Mount depth: 4"
• Sensitivity: 83.6 dB

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• Peak Power: 200 watts
• RMS Power: 100 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene Cone
• UV-Resistant Rubber Surround
• Mount depth: 4"
• Sensitivity: 83.6 dB

Alpine RS-SB12 (Open Box, Great)

1800W Peak (600W RMS) Loaded Single 12" Sealed Shallow Enclosure

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Alpine RS-SB12 (Open Box, Great)

1800W Peak (600W RMS) Loaded Single 12" Sealed Shallow Enclosure

• Sealed shallow enclosure with 1 12" R-Series Subwoofer
• 600 watts RMS (1800 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 17" L x 5.25" H x 26.5" W

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• Sealed shallow enclosure with 1 12" R-Series Subwoofer
• 600 watts RMS (1800 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 17" L x 5.25" H x 26.5" W

Cerwin Vega VMAX8D4

1000W Peak (500W RMS) 8” VMAXX Series Dual 4-ohm Subwoofer

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Cerwin Vega VMAX8D4

1000W Peak (500W RMS) 8” VMAXX Series Dual 4-ohm Subwoofer

• Peak Power: 1000 watts
• RMS Power: 500 watts
• Treated Semi-Pressed Pulped Cone
• Impedance: Dual 4 ohm
• Mount depth: 4.80"

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• Peak Power: 1000 watts
• RMS Power: 500 watts
• Treated Semi-Pressed Pulped Cone
• Impedance: Dual 4 ohm
• Mount depth: 4.80"

JL Audio 10TW1-4

300W RMS 10" TW1 Series Single 4-ohm Shallow Subwoofer

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JL Audio 10TW1-4

300W RMS 10" TW1 Series Single 4-ohm Shallow Subwoofer


• RMS Power: 300 watts
• Impedance: Single 4 ohm
• Mica Injected Polypropylene - MIPP Cone
• Rubber Surround
• Mount depth: 4.36"
• Sensitivity: 82.2 dB

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Tru Spec Dual 10SUBP (1554GSJ)

Empty Dual 10" Prefabricated Vented Enclosure

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Tru Spec Dual 10SUBP (1554GSJ)

Empty Dual 10" Prefabricated Vented Enclosure

• 10" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 2.50 cubic feet
• Computer-designed CNC cut

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Sundown Audio SA-15 Classic D4 15" (SA15CLD4)

2000W Peak (1000W RMS) 15" SA Classic Series Dual 4-ohm Car Subwoofer (SW-SACL15D4)

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Sundown Audio SA-15 Classic D4 15" (SA15CLD4)

2000W Peak (1000W RMS) 15" SA Classic Series Dual 4-ohm Car Subwoofer (SW-SACL15D4)

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 4 ohm
• Competition Grade Paper Cone
• Treated Foam Surround
• Mount depth: 7.69"
• Sensitivity: 89.2 dB

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Sundown Audio U-12 v.2 D2 12" (U12V2D2)

4000W Peak (2000W RMS) 12" U Series Dual 2-ohm Car Subwoofer (SW-UV212D2)

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Sundown Audio U-12 v.2 D2 12" (U12V2D2)

4000W Peak (2000W RMS) 12" U Series Dual 2-ohm Car Subwoofer (SW-UV212D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Pressed Paper Cone
• Double-Stitched Surround
• Mount depth: 8.43"
• Sensitivity: 85.19 dB

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Tru Spec DUAL ELITE 8 X

Empty Single 8" Vented Enclosure for Sundown X8 8" Subwoofers

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Tru Spec DUAL ELITE 8 X

Empty Single 8" Vented Enclosure for Sundown X8 8" Subwoofers

• 8" Dual Ported Subwoofer Enclosure
• Medium Density Fiberboard (MDF) construction
• Total box volume: 2 cubic feet
• Designed for use with Sundown X8 subwoofers (Sold separately)

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• 8" Dual Ported Subwoofer Enclosure
• Medium Density Fiberboard (MDF) construction
• Total box volume: 2 cubic feet
• Designed for use with Sundown X8 subwoofers (Sold separately)

Rockford Fosgate Prime R2S-1X12 (Open Box, Great)

500W Peak (250W RMS) Loaded Single 12" Sealed Shallow Truck Enclosure

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Rockford Fosgate Prime R2S-1X12 (Open Box, Great)

500W Peak (250W RMS) Loaded Single 12" Sealed Shallow Truck Enclosure

• Sealed truck enclosure with 1 12" Prime R2 Series Subwoofer
• 250 watts RMS (500 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 27.375" L x 13.5" H x 3.25" W x 5.25" W2

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• Sealed truck enclosure with 1 12" Prime R2 Series Subwoofer
• 250 watts RMS (500 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 27.375" L x 13.5" H x 3.25" W x 5.25" W2

JL Audio 10W7AE-3

750W RMS 10" W7AE Series Single 3-ohm Car Subwoofer

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JL Audio 10W7AE-3

750W RMS 10" W7AE Series Single 3-ohm Car Subwoofer

• RMS Power: 750 watts
• Impedance: Single 3 ohm
• Polypropylene Cone
• Polyester Foam Surround
• Mount depth: 8.5"
• Sensitivity: 84.3 dB

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Rockford Fosgate Power T2 T2S1-13

4000W Peak (2000W RMS) 13" Power Series Single 1-ohm Car Subwoofer

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Rockford Fosgate Power T2 T2S1-13

4000W Peak (2000W RMS) 13" Power Series Single 1-ohm Car Subwoofer

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Triple 1 ohm
• Glass Fiber Cone
• Injection molded foam Surround
• Mount depth: 9.7"
• Sensitivity: 90 dB

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Deaf Bonce Apocalypse DB-4515R D2

9000W Peak (4500W RMS) 15” Apocalypse Series Dual 2-ohm Car Subwoofer

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Deaf Bonce Apocalypse DB-4515R D2

9000W Peak (4500W RMS) 15” Apocalypse Series Dual 2-ohm Car Subwoofer

• Peak Power: 9000 watts
• RMS Power: 4500 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Cone
• Foam Surround
• Mount depth: 11.95"
• Sensitivity: 87.80 dB

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MTX SLH10X2S

Empty Dual 10" Ported Square Sledgehammer Enclosure

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MTX SLH10X2S

Empty Dual 10" Ported Square Sledgehammer Enclosure

• 10" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 2.18 cubic feet
• Mounting hardware included

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Alpine S-DB8V-TRK (Open Box, Great)

600W RMS Loaded Dual 8" Vented Truck Subwoofer Enclosure

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Alpine S-DB8V-TRK (Open Box, Great)

600W RMS Loaded Dual 8" Vented Truck Subwoofer Enclosure

• Ported truck enclosure with 2 8" S Series Subwoofer
• 600 watts RMS ( Peak)
• Final Impedance: 2-ohm x 2 sets
• Dimensions: 51" L x 8.63" H x 14" W

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• Ported truck enclosure with 2 8" S Series Subwoofer
• 600 watts RMS ( Peak)
• Final Impedance: 2-ohm x 2 sets
• Dimensions: 51" L x 8.63" H x 14" W

Sundown Audio SML-12 D4 12" (SML12D4)

1200W Peak (600W RMS) 12" SML Series Dual 4-ohm Shallow Car Subwoofer (SW-SML12D4)

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Sundown Audio SML-12 D4 12" (SML12D4)

1200W Peak (600W RMS) 12" SML Series Dual 4-ohm Shallow Car Subwoofer (SW-SML12D4)

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 4 ohm
• Pressed Paper cone
• Pressed Foam surround
• Mount depth: 4.45"
• Sensitivity: 86.7 dB

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Alpine W-DB12V

1500W Peak (500W RMS) Loaded Dual 12" Vented Subwoofer Enclosure

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Alpine W-DB12V

1500W Peak (500W RMS) Loaded Dual 12" Vented Subwoofer Enclosure

• Ported enclosure with 2 12" Bass Series Subwoofer
• 250 watts RMS each (750 watts Peak each)
• Final Impedance: 2-ohm
• Dimensions: 34-1/2" L x 17-1/2" H x 20-1/2" W

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• Ported enclosure with 2 12" Bass Series Subwoofer
• 250 watts RMS each (750 watts Peak each)
• Final Impedance: 2-ohm
• Dimensions: 34-1/2" L x 17-1/2" H x 20-1/2" W

Kicker L7R152 (45L7R152) (Open Box, Good)

1800W Peak (900W RMS) 15” Solo-Baric L7R Series Dual 2-ohm Subwoofer

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Kicker L7R152 (45L7R152) (Open Box, Good)

1800W Peak (900W RMS) 15” Solo-Baric L7R Series Dual 2-ohm Subwoofer

• Peak Power: 1800 watts
• RMS Power: 900 watts
• Impedance: Dual 2 ohm
• Injection-molded SoloKon Cone
• Ribbed Santoprene Surround
• Mount depth: 8 3/8"
• Sensitivity: 88.05 dB

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List price $399.99
-45% $221.99

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• Peak Power: 1800 watts
• RMS Power: 900 watts
• Impedance: Dual 2 ohm
• Injection-molded SoloKon Cone
• Ribbed Santoprene Surround
• Mount depth: 8 3/8"
• Sensitivity: 88.05 dB

Atrend 8DQV

Empty Dual 8" Vented Subwoofer Enclosure

8DQV big
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Atrend 8DQV

Empty Dual 8" Vented Subwoofer Enclosure

• 8" Dual 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: 1.13 cubic feet

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

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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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