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1978 Ford Thunderbird

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

Speakers & Speaker Installation for 1978 Ford Thunderbird

Find speakers to upgrade your sound and fit in the factory speaker location for your Thunderbird.  After you choose your speakers, we'll help you find speaker adapters, speaker harnesses and other accessories for installation.

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Speaker Size
Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
Design
The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
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.
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".
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.
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.
Tweeter Design
Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
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.
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Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

DB652 big
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Polk Audio DB652 (DB 652)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

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Save $11 on install kits for this speaker

found car based on your search
Fits the following location in your Thunderbird
12
List price $119.99
-9% $109.00 /pair

In stock

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Polk Audio DB6502 (DB 6502)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

DB6502 big
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Polk Audio DB6502 (DB 6502)

600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

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Install kits available for this speaker

found car based on your search
Fits the following location in your Thunderbird
8
List price $209.99
-5% $200.00 /set

In stock

Add to Cart
See all 14 special offers

Polk Audio MM652 (MM 652)

600W Peak (200W RMS) 6.5" Mobile Monitor Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

MM652 big
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Polk Audio MM652 (MM 652)

600W Peak (200W RMS) 6.5" Mobile Monitor Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

• 300 watts Peak Each, 100 watts RMS Each
• IP56 marine certified, with weep holes for proper drainage
• 1" Terylene Dome pivoting tweeters
• Titanium Coated Composite cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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Save $21 on install kits for this speaker

found car based on your search
Fits the following location in your Thunderbird
9
List price $249.00
-28% $179.00 /pair

In stock

Only 2 Left!

Add to Cart
See all 14 special offers

Polk Audio DB6502 (2-Pairs, 4-Total)

1200W Peak (400W RMS) 6.5" DB+ Series 2-Way Car & Marine Component Speaker System (2-Pairs)

DB6502_2 big
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Polk Audio DB6502 (2-Pairs, 4-Total)

1200W Peak (400W RMS) 6.5" DB+ Series 2-Way Car & Marine Component Speaker System (2-Pairs)

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your Thunderbird
8
List price $419.98
-24% $320.00

In stock

Add to Cart

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

Polk Audio (DB6502) 600 Watt 6.5" Component Speakers + Sound Dampening

600W Peak (300W RMS) 6.5" 2-Way Marine Grade Component Speakers (Pair) + SDSK2 Speaker Sound Dampening Kit - Two 10" x 10" Pieces

SDSK2,DB6502 big
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Polk Audio (DB6502) 600 Watt 6.5" Component Speakers + Sound Dampening

600W Peak (300W RMS) 6.5" 2-Way Marine Grade Component Speakers (Pair) + SDSK2 Speaker Sound Dampening Kit - Two 10" x 10" Pieces

• 300 Watts Max Each, 100 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 92dB
• Mounting Depth: 1.77"
• IP65 rated

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

Save $21 on install kits for this speaker

found car based on your search
Fits the following location in your Thunderbird
54
List price $228.73
-13% $200.00 /set

In stock

Add to Cart

• 300 Watts Max Each, 100 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 92dB
• Mounting Depth: 1.77"
• IP65 rated

Polk MM652 MM1 6.5" 600 Watt Coaxial Speakers + Sound Deadening & Roller

600W Peak (200W RMS) 6.5" 2-Way Coaxials with Sound Dampening and Application Roller

SDRLR1,SDSK2,MM652 big
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Polk MM652 MM1 6.5" 600 Watt Coaxial Speakers + Sound Deadening & Roller

600W Peak (200W RMS) 6.5" 2-Way Coaxials with Sound Dampening and Application Roller

• 180 Watts Max Each, 80 Watts RMS Each Side
• 1", Terylene Fabric Tweeter
• 6.5" Titanium-Plated Polymer Midwoofer Cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 2.62"

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
install icon

Save $21 on install kits for this speaker

found car based on your search
Fits the following location in your Thunderbird
74
List price $282.73
-30% $197.88 /pair

In stock

Only 2 Left!

Add to Cart

• 180 Watts Max Each, 80 Watts RMS Each Side
• 1", Terylene Fabric Tweeter
• 6.5" Titanium-Plated Polymer Midwoofer Cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 2.62"

Polk Audio MM652 6.5" Coaxial Speakers + Sound Dampening Kit

600W Peak (200W RMS) 6.5" Mobile Monitor Series 2-Way Coaxial Marine Speakers + Sound Dampening

SDSK2,MM652 big
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Polk Audio MM652 6.5" Coaxial Speakers + Sound Dampening Kit

600W Peak (200W RMS) 6.5" Mobile Monitor Series 2-Way Coaxial Marine Speakers + Sound Dampening

• 180 Watts Max Each, 80 Watts RMS Each Side
• 1", Terylene Fabric Tweeter
• 6.5" Titanium-Plated Polymer Midwoofer Cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 2.62"

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
install icon

Save $9 on install kits for this speaker

found car based on your search
Fits the following location in your Thunderbird
56
List price $267.74
-33% $178.99 /pair

In stock

Only 2 Left!

Add to Cart

• 180 Watts Max Each, 80 Watts RMS Each Side
• 1", Terylene Fabric Tweeter
• 6.5" Titanium-Plated Polymer Midwoofer Cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 2.62"

Polk Audio DB6502 6.5" Component Speakers + Sound Dampening Kit

600W Peak (200W RMS) 6.5" DB+ Series 2-way Marine Component Speakers with Sound Dampening

SDSK2,DB6502 big
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Polk Audio DB6502 6.5" Component Speakers + Sound Dampening Kit

600W Peak (200W RMS) 6.5" DB+ Series 2-way Marine Component Speakers with Sound Dampening

• 300 Watts Max Each, 100 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 92dB
• Mounting Depth: 1.77"
• IP65 rated

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
install icon

Save $21 on install kits for this speaker

found car based on your search
Fits the following location in your Thunderbird
54
List price $228.73
-9% $207.49 /set

In stock

Add to Cart

• 300 Watts Max Each, 100 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 92dB
• Mounting Depth: 1.77"
• IP65 rated

Lowest price in 30 days

(2) Polk Audio MM652 6.5” 600 Watt Car Audio Speakers+(2) Kicker 6.5" Speakers

2 Pairs (4 Total) 600W Peak (200W RMS) 2-Way Coaxial Package

46CSC654,MM652 big
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(2) Polk Audio MM652 6.5” 600 Watt Car Audio Speakers+(2) Kicker 6.5" Speakers

2 Pairs (4 Total) 600W Peak (200W RMS) 2-Way Coaxial Package

• 180 Watts Max Each, 80 Watts RMS Each Side
• 1", Terylene Fabric Tweeter
• 6.5" Titanium-Plated Polymer Midwoofer Cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 2.62"

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your Thunderbird
131
List price $368.99
-37% $231.95

In stock

Only 2 Left!

Add to Cart

• 180 Watts Max Each, 80 Watts RMS Each Side
• 1", Terylene Fabric Tweeter
• 6.5" Titanium-Plated Polymer Midwoofer Cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 2.62"

Polk Audio DB692 (DB 692)

900W Peak (300W RMS) 6x9" DB+ Series 3 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

DB692 big Out of stock
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Polk Audio DB692 (DB 692)

900W Peak (300W RMS) 6x9" DB+ Series 3 Way Coaxial 4-ohm Car, Marine and Powersports Speakers

• 450 watts Peak Each, 150 watts RMS Each
• 3/4" dual Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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VIP Product Get $13.90 in rewards to spend later

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Install kits available for most vehicles

found car based on your search
Fits the following location in your Thunderbird
  • Rear Deck Corner
15
List price $149.99
-7% $139.00 /pair
Notify Me

• 450 watts Peak Each, 150 watts RMS Each
• 3/4" dual Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

Polk Audio DB692 with Installation Accessories

300W RMS 6"x9" 3-way Car & Marine Coaxial Speakers with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

DB692, XBAF69, SDSK2, SDRLR1, BTK106 big Out of stock
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Polk Audio DB692 with Installation Accessories

300W RMS 6"x9" 3-way Car & Marine Coaxial Speakers with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

• 450 watts Peak Each, 150 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your Thunderbird
  • Rear Deck Corner
200
List price $242.70
-24% $184.68 /pair
Notify Me

• 450 watts Peak Each, 150 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

Polk Audio DB692 6x9" Speakers + Free Sound Dampening Kit

900W Peak (300W RMS) 6x9" 2-way Marine Coaxial Speakers + Sound Dampening

SDSK2,DB692 big Out of stock
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Polk Audio DB692 6x9" Speakers + Free Sound Dampening Kit

900W Peak (300W RMS) 6x9" 2-way Marine Coaxial Speakers + Sound Dampening

• 450 Watts Max Each, 150 Watts RMS Each
• 3/4" Tweeter
• Waterproof and UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 3.25"

install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your Thunderbird
  • Rear Deck Corner
61
List price $168.73
-18% $139.00 /pair
Add to Cart

• 450 Watts Max Each, 150 Watts RMS Each
• 3/4" Tweeter
• Waterproof and UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 3.25"

Polk Audio 6" x 9" Coaxial Speakers + Free NVX Sound Dampening Kit (DB692)

DB+ 692 6" x 9" 2-Way Marine Grade Coaxial Speakers (Pair) + SDSK2 Speaker Sound Dampening Kit - Two 10" x 10" Pieces

SDSK2,DB692 big Out of stock
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Polk Audio 6" x 9" Coaxial Speakers + Free NVX Sound Dampening Kit (DB692)

DB+ 692 6" x 9" 2-Way Marine Grade Coaxial Speakers (Pair) + SDSK2 Speaker Sound Dampening Kit - Two 10" x 10" Pieces

• 450 Watts Max Each, 150 Watts RMS Each
• 3/4" Tweeter
• Waterproof and UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 3.25"

install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your Thunderbird
  • Rear Deck Corner
61
List price $168.73
-18% $139.00 /pair
Add to Cart

• 450 Watts Max Each, 150 Watts RMS Each
• 3/4" Tweeter
• Waterproof and UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 3.25"

Polk Audio DB692 DB+ 6x9-inch (DB 692) (2-Pairs, 4-Total)

1800W Peak (600W RMS) 6x9" DB+ Series 3-way Car & Marine Coaxial Speakers (2-Pairs)

DB692_2 big Out of stock
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Polk Audio DB692 DB+ 6x9-inch (DB 692) (2-Pairs, 4-Total)

1800W Peak (600W RMS) 6x9" DB+ Series 3-way Car & Marine Coaxial Speakers (2-Pairs)

• 450 watts Peak Each, 150 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

Save 15% Off Package Deals at Checkout!
found car based on your search
Fits your Thunderbird
15
List price $299.98
-7% $278.00
Notify Me

• 450 watts Peak Each, 150 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

 
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    FAQ for Speakers in 1978 Thunderbird

    Q: Can I upgrade or change the Speakers in 1978 Ford Thunderbird?

    A: Yes this page includes all the best Speakers that work in your Thunderbird.

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