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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)
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SA Series (35)
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Z Series (18)
W0 v3 Series (17)
Reference Series (16)
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Polk Audio MM1 Series (2)
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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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Sundown Audio SA-15 Classic D2 15" (SA15CLD2)

2000W Peak (1000W RMS) 15" SA Classic Series Dual 2-ohm Car Subwoofer (SW-SACL15D2)

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Sundown Audio SA-15 Classic D2 15" (SA15CLD2)

2000W Peak (1000W RMS) 15" SA Classic Series Dual 2-ohm Car Subwoofer (SW-SACL15D2)

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 2 ohm
• Competition Grade Paper Cone
• Treated Foam Surround
• Mount depth: 7.69"
• Sensitivity: 89.2 dB

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JL Audio MicroSub CP208LG-W3v3

500W RMS Loaded Dual 8" Vented Enclosure

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JL Audio MicroSub CP208LG-W3v3

500W RMS Loaded Dual 8" Vented Enclosure

• Ported enclosure with 2 8" MicroSub Series Subwoofer
• 500 watts RMS
• Final Impedance: 2-ohm
• Dimensions: 35.5" L x 11" H x 5.125" W

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JBL Stage 82 (JBLSUBST82AM)

800W Peak (200W RMS) 8" Stage Series Single 4-ohm Car Subwoofer

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JBL Stage 82 (JBLSUBST82AM)

800W Peak (200W RMS) 8" Stage Series Single 4-ohm Car Subwoofer

• Peak Power: 800 watts
• RMS Power: 200 watts
• Impedance: Single 4 ohm
• Polypropylene Subwoofer Cone material
• Rubber Subwoofer Surround material
• Mount depth: 3-15/16"
• Sensitivity: 88 dB

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Rockford Fosgate Prime R2D2-12

500W Peak (250W RMS) 12" Prime Series Dual 2-ohm Car Subwoofer

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Rockford Fosgate Prime R2D2-12

500W Peak (250W RMS) 12" Prime Series Dual 2-ohm Car Subwoofer

• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Dual 2 ohm
• Mica Injected Polypropylene - MIPP Cone
• Poly-Foam Surround
• Mount depth: 5.067"
• Sensitivity: 87 dB

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Alpine S2-W8D2

900W Peak (300W RMS) 8" S-Series Dual 2-ohm Car Subwoofer

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Alpine S2-W8D2

900W Peak (300W RMS) 8" S-Series Dual 2-ohm Car Subwoofer

• Peak Power: 900 watts
• RMS Power: 300 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Polypropylene Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 3.71"
• Sensitivity: 82.6 dB

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Kicker Comp 10 (43C104)

300W Peak (150W RMS) 10" Comp Series Single 4-ohm Car Subwoofer

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Kicker Comp 10 (43C104)

300W Peak (150W RMS) 10" Comp Series Single 4-ohm Car Subwoofer

• Peak Power: 300 watts
• RMS Power: 150 watts
• Impedance: Single 4 ohm
• SoloKon Polypropylene Cone
• Ribbed Poly-Foam Surround
• Mount depth: 5 1/16"
• Sensitivity: 86.2 dB

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NVX XCW121

4000W Peak (2000W RMS) 12" X-Series Dual 1-ohm SPL Subwoofer

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NVX XCW121

4000W Peak (2000W RMS) 12" X-Series Dual 1-ohm SPL Subwoofer

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Enhanced Woven Fiber Paper Composite Cone
• Custom High Roll Foam Surround
• 30 mm Xmax (One Way)
• Sensitivity: 85.6 dB

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Sundown Audio E12 v.4 D4 12" (E12V4D4)

1500W Peak (750W RMS) 12" E Series Dual 4-ohm Car Subwoofer (SW-EV412D4)

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Sundown Audio E12 v.4 D4 12" (E12V4D4)

1500W Peak (750W RMS) 12" E Series Dual 4-ohm Car Subwoofer (SW-EV412D4)

• Peak Power: 1500 watts
• RMS Power: 750 watts
• Impedance: Dual 4 ohm
• Pressed Paper Cone
• Pressed Foam Surround
• Mount depth: 6.50"
• Sensitivity: 85.3 dB

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MTX TN12-04

400W Peak (200W RMS) 12" Terminator Series Single 4-ohm Car Subwoofer

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MTX TN12-04

400W Peak (200W RMS) 12" Terminator Series Single 4-ohm Car Subwoofer

• Peak Power: 400 watts
• RMS Power: 200 watts
• Impedance: Single 4 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 5.44"
• Sensitivity: 86.4 dB

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Kicker L7S84 (44L7S84)

900W Peak (450W RMS) 8” Solo-Baric L7S Series Dual 4-ohm Subwoofer

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Kicker L7S84 (44L7S84)

900W Peak (450W RMS) 8” Solo-Baric L7S Series Dual 4-ohm Subwoofer

• Peak Power: 900 watts
• RMS Power: 450 watts
• Impedance: Dual 4 ohm
• Injection Molded Polypropylene Cone
• Ribbed Santoprene Surround
• Mount depth: 4-3/4"
• Sensitivity: 82.37 dB

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Kicker L7TDF102 (49L7TDF102)

500W RMS Loaded Single 10" Sealed Square Subwoofer Truck Enclosure

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Kicker L7TDF102 (49L7TDF102)

500W RMS Loaded Single 10" Sealed Square Subwoofer Truck Enclosure

• Sealed truck enclosure with 1 10" Solo-Baric L7T Series Subwoofer
• 250-500 watts RMS Power Rating
• Final Impedance: 2-ohm
• Dimensions: 23 3/8" L x 6 1/8" H x 14 3/8" W

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Kicker VCWR122 (48VCWR122)

1000W Peak (500W RMS) Loaded Single 12" Vented Enclosure

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Kicker VCWR122 (48VCWR122)

1000W Peak (500W RMS) Loaded Single 12" Vented Enclosure

• Ported enclosure with 1 12" CompR Series Subwoofer
• 500 watts RMS (1000 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 18-3/8" L x 16" H x 11-1/4" W x 14-7/16" W2

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Cerwin-Vega V65DV2

1500W Peak (500W RMS) 6.5" Vega Series Dual 2-ohm Subwoofer

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Cerwin-Vega V65DV2

1500W Peak (500W RMS) 6.5" Vega Series Dual 2-ohm Subwoofer

• Peak Power: 1500 watts
• RMS Power: 500 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Polypropylene Cone
• Santoprene Rubber Surround
• Mount depth: 4.65"
• Sensitivity: 80 dB

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List price $155.99
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Sundown Audio E10 v.4 D2 10" (E10V4D2)

1500W Peak (750W RMS) 10" E Series Dual 2-ohm Car Subwoofer (SW-EV410D2)

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Sundown Audio E10 v.4 D2 10" (E10V4D2)

1500W Peak (750W RMS) 10" E Series Dual 2-ohm Car Subwoofer (SW-EV410D2)

• Peak Power: 1500 watts
• RMS Power: 750 watts
• Impedance: Dual 2 ohm
• Pressed Paper Cone
• Pressed Foam Surround
• Mount depth: 5.625"
• Sensitivity: 83.6 dB

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List price $269.99
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Alpine W-DB10V (Open Box, Great)

1500W Peak (500W RMS) Loaded Dual 10" Vented Subwoofer Enclosure

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Alpine W-DB10V (Open Box, Great)

1500W Peak (500W RMS) Loaded Dual 10" Vented Subwoofer Enclosure

• Ported enclosure with 2 10" Bass Series Subwoofer
• 250 watts RMS each (750 watts Peak each)
• Final Impedance: 2-ohm
• Dimensions: 30-1/2" L x 15-1/2" H x 18-1/4" W

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List price $550.00
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• Ported enclosure with 2 10" Bass Series Subwoofer
• 250 watts RMS each (750 watts Peak each)
• Final Impedance: 2-ohm
• Dimensions: 30-1/2" L x 15-1/2" H x 18-1/4" W

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Kicker CWCS154 (50CWCS154)

900W Peak (450W RMS) 15" CompC Series Single 4-ohm Car Subwoofer

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Kicker CWCS154 (50CWCS154)

900W Peak (450W RMS) 15" CompC Series Single 4-ohm Car Subwoofer

• Peak Power: 900 watts
• RMS Power: 225-450 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene Cone
• Ribbed Polyurethane Surround
• Mount depth: 7-3/8"
• Sensitivity: 89.2 dB

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Sundown Audio SA-18 v.2 D4 18" (SA18V2D4)

2500W Peak (1250W RMS) 18" SA Series Dual 4-ohm Car Subwoofer (SW-SAV218D4)

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Sundown Audio SA-18 v.2 D4 18" (SA18V2D4)

2500W Peak (1250W RMS) 18" SA Series Dual 4-ohm Car Subwoofer (SW-SAV218D4)

• Peak Power: 2500 watts
• RMS Power: 1250 watts
• Impedance: Dual 4 ohm
• Competition Grade Paper cone
• Foam surround
• Mount depth: 10.125"
• Sensitivity: 90.7 dB

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• Peak Power: 2500 watts
• RMS Power: 1250 watts
• Impedance: Dual 4 ohm
• Competition Grade Paper cone
• Foam surround
• Mount depth: 10.125"
• Sensitivity: 90.7 dB

Hifonics Elite 8" (HEW8D2)

1200W Peak (600W RMS) 8" Hifonics Elite Series Dual 2-ohm Subwoofer

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Hifonics Elite 8" (HEW8D2)

1200W Peak (600W RMS) 8" Hifonics Elite Series Dual 2-ohm Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• Double Stitched Foam Surround
• Mount depth: 5.66"
• Sensitivity: 81.2 dB

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$169.00

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Tru Spec Dual 10SUBP and 2x Sundown Audio E10 v.4

Empty Dual 10" Prefabricated Vented Enclosure with 1500W Peak (750W RMS) 10" E Series Dual 2-ohm Car Subwoofer (SW-EV410D2)

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Tru Spec Dual 10SUBP and 2x Sundown Audio E10 v.4

Empty Dual 10" Prefabricated Vented Enclosure with 1500W Peak (750W RMS) 10" E Series Dual 2-ohm Car Subwoofer (SW-EV410D2)

• 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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List price $939.97
-27% $684.97

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

Limited time!

Kicker TCWRT102 (48TCWRT102)

800W Peak (400W RMS) Loaded Single 10" Sealed Truck Enclosure with Passive Radiator

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Kicker TCWRT102 (48TCWRT102)

800W Peak (400W RMS) Loaded Single 10" Sealed Truck Enclosure with Passive Radiator

• Sealed truck enclosure with 1 10" CompRT Series Subwoofer
• 400 watts RMS (800 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 23-1/4" L x 11-13/16" H x 3-7/16" W x 11-13/16" W2

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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?

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