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1978 Triumph TR7

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Subwoofers and enclosures, specifically designed for your 1978 TR7, as well as universal fit solutions

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

Subwoofers and Boxes for 1978 Triumph TR7

A subwoofer that works with, or is designed for, your 1978 Triumph TR7 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 Triumph TR7, 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 Triumph TR7, 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 Triumph TR7, 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 (42)
CompR Series (41)
S Series (41)
W3 v3 Series (41)
CompC Series (37)
SA Series (35)
Prime Series (30)
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TW3 Shallow Mount Series (19)
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Z Series (18)
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35 Series (14)
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Polk Audio MM1 Series (2)
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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 NS v.6 D1 18" (NSV618D1) (Open Box, Great)

7000W Peak (3500W RMS) 18" Nightshade Series Dual 1-ohm Car Subwoofer (SW-NSV618D1)

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Sundown Audio NS v.6 D1 18" (NSV618D1) (Open Box, Great)

7000W Peak (3500W RMS) 18" Nightshade Series Dual 1-ohm Car Subwoofer (SW-NSV618D1)

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Polypropylene Cone
• Mega Roll V2 Surround
• Sensitivity: 87.47 dB

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• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1 ohm
• Polypropylene Cone
• Mega Roll V2 Surround
• Sensitivity: 87.47 dB

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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DC Audio Level 3 10M3D1 (M3LV310D1)

2000W Peak (1000W RMS) 10" Level 3 Series M3 Version Dual 1-ohm Car Subwoofer

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DC Audio Level 3 10M3D1 (M3LV310D1)

2000W Peak (1000W RMS) 10" Level 3 Series M3 Version Dual 1-ohm Car Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 1 ohm
• Non-Pressed Paper cone
• Multi-layered Polymer Foam surround
• Mount depth: 6.25"
• Sensitivity: 82.29 dB

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List price $490.03
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Atrend 10DV-MOJO

Empty Dual 10" Vented Enclosure for Memphis MOJO, MOJO Pro, and M6/M7 Series Subwoofers

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Atrend 10DV-MOJO

Empty Dual 10" Vented Enclosure for Memphis MOJO, MOJO Pro, and M6/M7 Series Subwoofers

• 10" Dual Ported Subwoofer Enclosure
• Fits Memphis MOJO, MOJO Pro, and M6/M7 series subwoofers
• 1" Medium Density Fiberboard (MDF) construction
• Premium black carpet finish
• Total box volume: 3.2 cubic feet

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Sundown Audio M-15 D2 15" (M15D2)

4000W Peak (2000W RMS) 15" M Series Dual 2-ohm Car Subwoofer (SW-M15D2)

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Sundown Audio M-15 D2 15" (M15D2)

4000W Peak (2000W RMS) 15" M Series Dual 2-ohm Car Subwoofer (SW-M15D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• High Roll Foam Surround
• Mount depth: 12.06"
• Sensitivity: 83.30 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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Kicker L7X122 (49L7X122)

2000W RMS 12" SoloX Series Dual 2-ohm Subwoofer

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Kicker L7X122 (49L7X122)

2000W RMS 12" SoloX Series Dual 2-ohm Subwoofer

• RMS Power: 1000 - 2000 watts
• Impedance: Dual 2 ohm
• Double-pressed pulp Cone
• UV-resistant Santoprene Surround
• Mount depth: 10-1/8"

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• RMS Power: 1000 - 2000 watts
• Impedance: Dual 2 ohm
• Double-pressed pulp Cone
• UV-resistant Santoprene Surround
• Mount depth: 10-1/8"

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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JL Audio 12W1v3-2

300W RMS 12" W1v3 Series Single 2-ohm Car Subwoofer

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JL Audio 12W1v3-2

300W RMS 12" W1v3 Series Single 2-ohm Car Subwoofer


• RMS Power: 300 watts
• Impedance: Single 2 ohm
• Mica Injected Polypropylene - MIPP Cone
• Nitrile Butadiene Rubber NBR Surround
• Mount depth: 5.41"
• Sensitivity: 85.9 dB

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Kicker L7T102 (46L7T102)

1000W Peak (500W RMS) 10" Solo-Baric L7T Series Dual 2-ohm Shallow Car Subwoofer

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Kicker L7T102 (46L7T102)

1000W Peak (500W RMS) 10" Solo-Baric L7T Series Dual 2-ohm Shallow Car Subwoofer

• Peak Power: 1000 watts
• RMS Power: 500 watts
• Impedance: Dual 2 ohm
• SoloKon Polypropylene Cone
• Ribbed Santoprene Surround
• Mount depth: 3-3/4"
• Sensitivity: 85.98 dB

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Deaf Bonce Apocalypse DB-3515R D1

7000W Peak (3500W RMS) 15” Apocalypse Series Dual 1-ohm Car Subwoofer

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Deaf Bonce Apocalypse DB-3515R D1

7000W Peak (3500W RMS) 15” Apocalypse Series Dual 1-ohm Car Subwoofer

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Carbon Fiber Cone
• Foam Surround
• Impedance: Dual 1 ohm
• Mount depth: 10.96"
• Sensitivity: 87.30 dB

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List price $1049.90
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Belva BLB112LED

12" Single 750W Loaded Ported Car Subwoofer with Multi-Color LED and Remote

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Belva BLB112LED

12" Single 750W Loaded Ported Car Subwoofer with Multi-Color LED and Remote

• 750W Single 12" Ported Subwoofer Enclosure w/ Multi-Color LED and Remote
• RMS: 300W
• 4 ohm impedance
• Ported enclosure with black carpet and embroidered Belva logo
• Angled-back ported enclosure

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• 750W Single 12" Ported Subwoofer Enclosure w/ Multi-Color LED and Remote
• RMS: 300W
• 4 ohm impedance
• Ported enclosure with black carpet and embroidered Belva logo
• Angled-back ported enclosure

JL Audio C6-650cw

100W RMS 6.5" C6 Series Single 4-ohm Subwoofer

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JL Audio C6-650cw

100W RMS 6.5" C6 Series Single 4-ohm Subwoofer

• RMS Power: 100 watts
• Impedance: Single 4 ohm
• Mineral-Filled Polypropylene Cone
• Rubber Surround
• Mount depth: 2.6"
• Sensitivity: 87.37 dB

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Kicker L7T124 (46L7T124) (Open Box, Great)

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

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Kicker L7T124 (46L7T124) (Open Box, Great)

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

10% Off Open Box!
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List price $349.99
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• 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

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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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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MTX SLH12X2

Empty Dual 12" Ported Sledgehammer Enclosure

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MTX SLH12X2

Empty Dual 12" Ported Sledgehammer Enclosure

• 12" Dual Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 2.66 cubic feet
• Mounting hardware included

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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 CVX124 (50CVX124)

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

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Kicker CVX124 (50CVX124)

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

• Peak Power: 1500 watts
• RMS Power: 750 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Ribbed Santoprene Surround
• Mount depth: 6-11/16"
• Sensitivity: 87.1 dB

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Kicker CWRT122 (48CWRT122) (Open Box, Great)

1000W Peak (500W RMS) 12" CompRT Series Dual 2-ohm Shallow Car Subwoofer

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Kicker CWRT122 (48CWRT122) (Open Box, Great)

1000W Peak (500W RMS) 12" CompRT Series Dual 2-ohm Shallow Car Subwoofer

• Peak Power: 1000 watts
• RMS Power: 500 watts
• Impedance: Dual 2 ohm
• UV-Treated Polypropylene Cone
• UV-resistant Santoprene Surround
• Mount depth: 3-3/4"
• Sensitivity: 85.5 dB

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List price $279.99
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• Peak Power: 1000 watts
• RMS Power: 500 watts
• Impedance: Dual 2 ohm
• UV-Treated Polypropylene Cone
• UV-resistant Santoprene Surround
• Mount depth: 3-3/4"
• Sensitivity: 85.5 dB

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    FAQ for Subwoofer and Sub Box Upgrades in 1978 TR7

    Q: Can I upgrade or change the Subwoofer and Sub Box Upgrades in 1978 Triumph TR7?

    A: Yes this page includes all the best Subwoofer and Sub Box Upgrades that work in your TR7.

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