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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

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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)
S Series (43)
CompRT Series (42)
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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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PRV Audio RS65-SUBD4

600W Peak (300W RMS) 6.5" RS Series Dual 4-ohm Car Subwoofer

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PRV Audio RS65-SUBD4

600W Peak (300W RMS) 6.5" RS Series Dual 4-ohm Car Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Pressed Paper cone
• High Roll Foam surround
• Mount depth: 3.46"
• Sensitivity: 82 dB

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• Peak Power: 600 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Pressed Paper cone
• High Roll Foam surround
• Mount depth: 3.46"
• Sensitivity: 82 dB

Infinity Kappa 103WDSSI (INFSUBKA103WDSSIAM) (Open Box, Great)

1350W Peak (450W RMS) 10” Kappa Series Single 2-or 4-ohm Car Subwoofer

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Infinity Kappa 103WDSSI (INFSUBKA103WDSSIAM) (Open Box, Great)

1350W Peak (450W RMS) 10” Kappa Series Single 2-or 4-ohm Car Subwoofer

• Peak Power: 1350 watts
• RMS Power: 450 watts
• Impedance: Single 2 or 4 ohm
• Glass Fiber Cone
• Rubber Surround
• Mount depth: 6-1/4"
• Sensitivity: 91 dB

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• Peak Power: 1350 watts
• RMS Power: 450 watts
• Impedance: Single 2 or 4 ohm
• Glass Fiber Cone
• Rubber Surround
• Mount depth: 6-1/4"
• Sensitivity: 91 dB

Alpine R2-W12D2 (Open Box, Great)

2250W Peak (750W RMS) 12" R2-Series Dual 2-ohm Car Subwoofer

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Alpine R2-W12D2 (Open Box, Great)

2250W Peak (750W RMS) 12" R2-Series Dual 2-ohm Car Subwoofer

• Peak Power: 2250 watts
• RMS Power: 750 watts
• Impedance: Dual 2 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 6.43"
• Sensitivity: 85 dB

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• Peak Power: 2250 watts
• RMS Power: 750 watts
• Impedance: Dual 2 ohm
• Kevlar Reinforced Pulp Paper Cone
• High-Amplitude Multi-Roll (HAMR) Surround
• Mount depth: 6.43"
• Sensitivity: 85 dB

JL Audio ProWedge CLS110RG-W7AE

750W RMS Loaded Single 10" Sealed Enclosure

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JL Audio ProWedge CLS110RG-W7AE

750W RMS Loaded Single 10" Sealed Enclosure

• Sealed enclosure with 1 10" W7 Series Subwoofer
• 750 watts RMS
• Final Impedance: 3-ohm
• Dimensions: 17-5/8" L x 14-5/8" H x 16-3/4" W x 11.5" W2

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Kicker CVX122 (50CVX122) (Open Box, Great)

1500W Peak (750W RMS) 12" CompVX Series Dual 2-ohm Car Subwoofer

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Kicker CVX122 (50CVX122) (Open Box, Great)

1500W Peak (750W RMS) 12" CompVX Series Dual 2-ohm Car Subwoofer

• Peak Power: 1500 watts
• RMS Power: 750 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• Ribbed Santoprene Surround
• Mount depth: 6-11/16"
• Sensitivity: 87.1 dB

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• Peak Power: 1500 watts
• RMS Power: 750 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• Ribbed Santoprene Surround
• Mount depth: 6-11/16"
• Sensitivity: 87.1 dB

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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Cerwin Vega VMAX12D4

2000W Peak (1000W RMS) 12” VMAXX Series Dual 4-ohm Car Subwoofer

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Cerwin Vega VMAX12D4

2000W Peak (1000W RMS) 12” VMAXX Series Dual 4-ohm Car Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 4 ohm
• Treated Semi-Pressed Pulped Cone
• Rubber Surround
• Mount depth: 6.6"
• Sensitivity: 84.8 dB

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MTX TN12-02

400W Peak (200W RMS) 12" Terminator Series Single 2-ohm Car Subwoofer

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MTX TN12-02

400W Peak (200W RMS) 12" Terminator Series Single 2-ohm Car Subwoofer

• Peak Power: 400 watts
• RMS Power: 200 watts
• Impedance: Single 2 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 5.44"
• Sensitivity: 86.4 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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JL Audio 12TW1-2

300W RMS 12" TW1 Series Single 2-ohm Shallow Subwoofer

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JL Audio 12TW1-2

300W RMS 12" TW1 Series Single 2-ohm Shallow Subwoofer

• RMS Power: 300 watts
• Impedance: Single 2 ohm
• Mica Injected Polypropylene - MIPP Cone
• Rubber Surround
• Mount depth: 4.62"
• Sensitivity: 85.07 dB

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MTX S6512-44

1000W Peak (500W RMS) 12" S65 Series Dual 4-ohm Car Subwoofer

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MTX S6512-44

1000W Peak (500W RMS) 12" S65 Series Dual 4-ohm Car Subwoofer

• Peak Power: 1000 watts
• RMS Power: 500 watts
• Impedance: Dual 4 ohm
• Polypropylene Cone
• Mount depth: 6.9375"
• Sensitivity: 86.7 dB

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Alpine W10S4 BassLine (Pair)

Two 750W Max (250W RMS) 10" BassLine Series Single 4 ohm Car Subwoofers

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Alpine W10S4 BassLine (Pair)

Two 750W Max (250W RMS) 10" BassLine Series Single 4 ohm Car Subwoofers

• 750W Max
• 250W RMS
• Polypropylene-Mica cone
• High-excursion poly-foam surround
• High-strength custom steel frame
• Progressive Wavelit Ribs (P.W.R.) cone design

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• 750W Max
• 250W RMS
• Polypropylene-Mica cone
• High-excursion poly-foam surround
• High-strength custom steel frame
• Progressive Wavelit Ribs (P.W.R.) cone design

Kicker 52VCVR122

900W Peak Loaded Single 12" Hatchback Vented Subwoofer Enclosure

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Kicker 52VCVR122

900W Peak Loaded Single 12" Hatchback Vented Subwoofer Enclosure

• Ported enclosure with 1 12" CompVR Series Subwoofer
• 450 watts Recommended Amp Power RMS (900 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 32-3/8" L x 16" H x 14" W x 17-1/4" W2

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Kicker CWCS154 (50CWCS154) (Open Box, Good)

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

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Kicker CWCS154 (50CWCS154) (Open Box, Good)

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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• 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

Sundown Audio Z-15 v.6 D2 15" (Z15V6D2) (Open Box, Great)

6500W Peak (3250W RMS) 15" Z Series Dual 2-ohm Car Subwoofer (SW-ZV615D2)

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Sundown Audio Z-15 v.6 D2 15" (Z15V6D2) (Open Box, Great)

6500W Peak (3250W RMS) 15" Z Series Dual 2-ohm Car Subwoofer (SW-ZV615D2)

• Peak Power: 6500 watts
• RMS Power: 3250 watts
• Impedance: Dual 2 ohm
• Treated Paper Cone
• Mega Roll V2 Surround
• Mount depth: 12.93"
• Sensitivity: 86.57 dB

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• Peak Power: 6500 watts
• RMS Power: 3250 watts
• Impedance: Dual 2 ohm
• Treated Paper Cone
• Mega Roll V2 Surround
• Mount depth: 12.93"
• Sensitivity: 86.57 dB

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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Kicker Comp 15 (43C154) (Open Box, Great)

500W Peak (250W RMS) 15" Comp Series Single 4-ohm Subwoofer

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Kicker Comp 15 (43C154) (Open Box, Great)

500W Peak (250W RMS) 15" Comp Series Single 4-ohm Subwoofer

• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene cone
• Foam surround
• Mount depth: 7-7/16"
• Sensitivity: 90.3 dB

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• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Single 4 ohm
• Injection Molded Polypropylene cone
• Foam surround
• Mount depth: 7-7/16"
• Sensitivity: 90.3 dB

Massive Audio SUMMOXL104

3000W Peak (1500W RMS) 10" SUMMO Series Dual 4-ohm Car Subwoofer

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Massive Audio SUMMOXL104

3000W Peak (1500W RMS) 10" 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: 6.81"
• Sensitivity: 90.3 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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$279.99

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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 R2 R2SD4-10

400W Peak (200W RMS) 10" Prime Series Dual 4-ohm Shallow Car Subwoofer

R2SD4-10 big
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Rockford Fosgate Prime R2 R2SD4-10

400W Peak (200W RMS) 10" Prime Series Dual 4-ohm Shallow Car Subwoofer

• Peak Power: 400 watts
• RMS Power: 200 watts
• Impedance: Dual 4 ohm
• Mica Injected Polypropylene - MIPP Cone
• Foam Surround
• Mount depth: 3.417"
• Sensitivity: 82 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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