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1978 Cadillac DeVille

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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 Cadillac DeVille

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

All car speakers

Shop All Speaker Locations in the Vehicle

See all speakers that fit, regardless of location.

Dash Corner

Dash Corner Speakers

Speakers for your dash corner

Front Door Panel Speakers

Front Door Speakers

Speakers for your front door panels

Rear Deck Corner

Rear Deck Corner Speakers

Speakers for your corner rear deck

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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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Infinity Kappa 503CF (2-Pairs, 4-Total)

960W Peak (320W RMS) 5.25” Kappa Series 2-way Component Speakers System (2-Pairs)

KAPPA503CF_2 big
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Infinity Kappa 503CF (2-Pairs, 4-Total)

960W Peak (320W RMS) 5.25” Kappa Series 2-way Component Speakers System (2-Pairs)

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Edge-Driven Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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found car based on your search
Fits your DeVille
1
List price $899.90
-38% $559.98

In stock

Add to Cart

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Edge-Driven Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Infinity PR9693M with Speaker Installation Kit

180W Peak (60W RMS) 6 x 9” Coaxial Car Speakers

INFSPKPR693M, XBAF69, SDSK2, SDRLR2, BTK106 big
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Infinity PR9693M with Speaker Installation Kit

180W Peak (60W RMS) 6 x 9” Coaxial Car Speakers

• 180 watts Peak Each, 60 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
188
List price $272.66
-28% $195.64 /pair

In stock

Only 1 Left!

Add to Cart

• 180 watts Peak Each, 60 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

JBL Stage3 607C with Speaker Installation Kit

Kappa Series 5.25” 2-Way Car Component Speakers System + NVX Speaker Baffles, Sound Dampening, Roller, and Panel Removal Kit

Kappa 503CF, XBAF525, SDSK2, SDRLR1, BTK106 big
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JBL Stage3 607C with Speaker Installation Kit

Kappa Series 5.25” 2-Way Car Component Speakers System + NVX Speaker Baffles, Sound Dampening, Roller, and Panel Removal Kit

• 330 watts Watts Max Each Side, 110 watts Watts RMS Each Side
• 3/4"" Textile Dome Tweeter
• Fiberglass cone material
• Impedance: 3 ohm Ohm
• Sensitivity: 93 dB dB
• Mounting Depth: 2.25""

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Install kits available for most vehicles

found car based on your search
Fits the following location in your DeVille
  • Front Door
150
List price $522.66
-39% $320.02 /set

In stock

Add to Cart

• 330 watts Watts Max Each Side, 110 watts Watts RMS Each Side
• 3/4"" Textile Dome Tweeter
• Fiberglass cone material
• Impedance: 3 ohm Ohm
• Sensitivity: 93 dB dB
• Mounting Depth: 2.25""

Infinity Primus 503CF with Installation Accessories

100W RMS 5.25” 2-Way Component Speaker System with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

PR503CF, XBAF525, SDSK2, SDRLR1, BTK106 big
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Infinity Primus 503CF with Installation Accessories

100W RMS 5.25” 2-Way Component Speaker System with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

• 150 watts Peak Each, 50 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 91 dB

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
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Install kits available for most vehicles

found car based on your search
Fits the following location in your DeVille
  • Front Door
122
List price $223.66
-28% $161.21 /set

In stock

Add to Cart

• 150 watts Peak Each, 50 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 91 dB

Infinity REF697MF with Sound Damping

600W Peak (200W RMS) 6x9" Reference Series 3-way 4-ohm Coaxial Speakers + NVX SDSK2 Sound Damping

REF697MF_SDSK2 big
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Infinity REF697MF with Sound Damping

600W Peak (200W RMS) 6x9" Reference Series 3-way 4-ohm Coaxial Speakers + NVX SDSK2 Sound Damping

• 300 watts Peak Each, 100 watts RMS Each
• 1" Textile Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
Fits select models only.
Add details to confirm fitment.
50
List price $218.69
-15% $184.94

In stock

Add to Cart

• 300 watts Peak Each, 100 watts RMS Each
• 1" Textile Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

Infinity Reference REF-5030CX with Speaker Installation Accessories

130W RMS 5.25” Component Speaker System with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

REF5030CXAM, XBAF525, SDSK2, SDRLR1, BTK106 big
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Infinity Reference REF-5030CX with Speaker Installation Accessories

130W RMS 5.25” Component Speaker System with Speaker Baffles, Sound Damping, Roller, and Panel Removal Kit

• 195 watts Peak Each, 65 watts RMS Each
• 3/4" Textile Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
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Install kits available for most vehicles

found car based on your search
Fits the following location in your DeVille
  • Front Door
122
List price $323.66
-53% $151.21 /set

In stock

Add to Cart

• 195 watts Peak Each, 65 watts RMS Each
• 3/4" Textile Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Infinity PR503F with Speaker Installation Kit

120W Peak (40W RMS) Primus Series 5-1/4” 2-Way Car Speakers

INFSPKPR503F, XBAF525, SDSK2, SDRLR1, BTK106 big
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Infinity PR503F with Speaker Installation Kit

120W Peak (40W RMS) Primus Series 5-1/4” 2-Way Car Speakers

• 120 watts Peak Each, 40 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 91 dB

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

Install kits available for most vehicles

found car based on your search
Fits the following location in your DeVille
  • Front Door
149
List price $172.66
-36% $109.98 /pair

In stock

Only 3 Left!

Add to Cart

• 120 watts Peak Each, 40 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 91 dB

Infinity REF507F with Sound Damping

270W Peak (90W RMS) 5.25" Reference Series 2-way 3-ohm Speakers + NVX SDSK2 Sound Damping

REF507F_SDSK2 big
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Infinity REF507F with Sound Damping

270W Peak (90W RMS) 5.25" Reference Series 2-way 3-ohm Speakers + NVX SDSK2 Sound Damping

• 135 watts Peak Each, 45 watts RMS Each
• 1/2" Textile Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your DeVille
49
List price $158.69
-21% $124.94

In stock

Add to Cart

• 135 watts Peak Each, 45 watts RMS Each
• 1/2" Textile Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

Infinity Primus 503F with Sound Damping

480W Peak (160W RMS) Primus Series 5.25” 2-Way Coaxial Car Speakers + NVX SDSK2 Sound Damping

PR503F_SDSK2 big
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Infinity Primus 503F with Sound Damping

480W Peak (160W RMS) Primus Series 5.25” 2-Way Coaxial Car Speakers + NVX SDSK2 Sound Damping

• 120 watts Peak Each, 40 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 91 dB

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your DeVille
48
List price $118.69
-28% $84.94

In stock

Only 3 Left!

Add to Cart

• 120 watts Peak Each, 40 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 91 dB

Infinity REF607CF (2-Pairs, 4-Total)

1080W Peak (360W RMS) 6.5" Reference Series 2-way 4-ohm Component Speaker System (2-Pairs)

REF607CF_2 big
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Infinity REF607CF (2-Pairs, 4-Total)

1080W Peak (360W RMS) 6.5" Reference Series 2-way 4-ohm Component Speaker System (2-Pairs)

• 270 watts Peak Each, 90 watts RMS Each
• 3/4" Textile Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
Fits select models only.
Add details to confirm fitment.
3
List price $499.90
-12% $439.90

In stock.

Add to Cart

• 270 watts Peak Each, 90 watts RMS Each
• 3/4" Textile Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

Infinity REF607CF with Sound Damping

540W Peak (180W RMS) 6.5" Reference Series 2-way 4-ohm Component Speaker System + NVX SDSK2 Sound Damping

REF607CF_SDSK2 big
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Infinity REF607CF with Sound Damping

540W Peak (180W RMS) 6.5" Reference Series 2-way 4-ohm Component Speaker System + NVX SDSK2 Sound Damping

• 270 watts Peak Each, 90 watts RMS Each
• 3/4" Textile Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

Save 15% Off Package Deals at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
Fits select models only.
Add details to confirm fitment.
51
List price $268.69
-13% $234.94

In stock.

Add to Cart

• 270 watts Peak Each, 90 watts RMS Each
• 3/4" Textile Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

Infinity REF607FSL (INFSPKRF607FSLUS) with REF-9632ix

330W Peak (110W RMS) 6.5" Reference Series 2-way 3-ohm + 600W Max (200W RMS) 6x9" Coaxial Car Speakers

REF607FSL_REF9632IXAM big
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Infinity REF607FSL (INFSPKRF607FSLUS) with REF-9632ix

330W Peak (110W RMS) 6.5" Reference Series 2-way 3-ohm + 600W Max (200W RMS) 6x9" Coaxial Car Speakers

• 165 watts Peak Each, 55 watts RMS Each
• 1" Textile Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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

Fits select models only.
Add details to confirm fitment.
4
List price $309.90
-19% $249.90 /pair

In stock.

Add to Cart

• 165 watts Peak Each, 55 watts RMS Each
• 1" Textile Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Infinity REF607CF (INFSPKRF607CFUS) (Open Box, Great)

540W Peak (180W RMS) 6.5" Reference Series 2 Way 3-ohm Component Speaker System

REF607CF big
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Infinity REF607CF (INFSPKRF607CFUS) (Open Box, Great)

540W Peak (180W RMS) 6.5" Reference Series 2 Way 3-ohm Component Speaker System

• 270 watts Peak Each, 90 watts RMS Each
• 3/4" Textile Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
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Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
3
List price $249.95
-25% $186.96 /set

In stock.

Add to Cart

Infinity Reference REF-4032cfx with Sound Damping

210W Peak (70W RMS) Reference Series 4" 2-Way Car Speakers + NVX SDSK2 Sound Damping

REF4032CFXAM_SDSK2 big Out of stock
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Infinity Reference REF-4032cfx with Sound Damping

210W Peak (70W RMS) Reference Series 4" 2-Way Car Speakers + NVX SDSK2 Sound Damping

• 105 watts Peak Each, 35 watts RMS Each
• 1" Textile Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

Save 15% Off Package Deals at Checkout!
found car based on your search
Fits your DeVille
49
List price $158.69
-40% $94.98
Add to Cart

• 105 watts Peak Each, 35 watts RMS Each
• 1" Textile Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

Infinity REF607F (INFSPKRF607FUS)

360W Peak (120W RMS) 6.5" Reference Series 2-Way Coaxial 3-ohm Speakers

REF607F big Out of stock
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Infinity REF607F (INFSPKRF607FUS)

360W Peak (120W RMS) 6.5" Reference Series 2-Way Coaxial 3-ohm Speakers

• 180 watts Peak Each, 60 watts RMS Each
• 1" Textile Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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Free or discounted install kits when available.

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Add details to confirm fitment.
2
List price $149.95
-20% $119.95 /pair
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• 180 watts Peak Each, 60 watts RMS Each
• 1" Textile Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Infinity REF-6532ex with Sound Damping

330W Max (110W RMS) 6.5" Reference Series 2-Way Coaxial EZ Fit Car Speakers + NVX SDSK2 Sound Damping

REF6532EXAM_SDSK2 big Out of stock
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Infinity REF-6532ex with Sound Damping

330W Max (110W RMS) 6.5" Reference Series 2-Way Coaxial EZ Fit Car Speakers + NVX SDSK2 Sound Damping

• 165 Watts Max Each, 55 Watts RMS Each
• Edge-Driven Textile Tweeter
• Plus One Polypropylene Oversized Cone
• 3 ohm Impedance
• Sensitivity: 93dB
• Mounting Depth: 1-13/16"

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54
List price $148.74
-36% $94.98
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• 165 Watts Max Each, 55 Watts RMS Each
• Edge-Driven Textile Tweeter
• Plus One Polypropylene Oversized Cone
• 3 ohm Impedance
• Sensitivity: 93dB
• Mounting Depth: 1-13/16"

Limited time!

Infinity Reference REF-4032cfx (REF4032CFXAM)

210W Peak (70W RMS) 4" Reference Series 2 Way Coaxial 3-ohm Speakers

REF4032CFXAM big Out of stock
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Infinity Reference REF-4032cfx (REF4032CFXAM)

210W Peak (70W RMS) 4" Reference Series 2 Way Coaxial 3-ohm Speakers

• 105 watts Peak Each, 35 watts RMS Each
• 1" Textile Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

Free Speaker Accessory at Checkout!
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VIP Product Get $8.00 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 DeVille
  • Dash Corner
1
List price $139.95
-43% $79.99 /pair
Notify Me

• 105 watts Peak Each, 35 watts RMS Each
• 1" Textile Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

Limited time!

Infinity Primus PR693C (INFSPKPR693C)

480W Peak (160W RMS) 6x9” Primus Series 2 Way 3-ohm Component Speaker System

PR693C big Out of stock
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Infinity Primus PR693C (INFSPKPR693C)

480W Peak (160W RMS) 6x9” Primus Series 2 Way 3-ohm Component Speaker System

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Edge Driven Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Free Speaker Accessory at Checkout!
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VIP Product Get $17.00 in rewards to spend later

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Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
2
List price $199.95
-15% $169.95 /set
Add to Cart

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Edge Driven Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Infinity Primus PR693C (2-Pairs, 4-Total)

960W Peak (320W RMS) 6x9” Primus Series 2-Way Component Speakers (2-Pairs)

PR693C_2 big Out of stock
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Infinity Primus PR693C (2-Pairs, 4-Total)

960W Peak (320W RMS) 6x9” Primus Series 2-Way Component Speakers (2-Pairs)

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Save 15% Off Package Deals at Checkout!
Fits select models only.
Add details to confirm fitment.
2
List price $399.90
-15% $339.90
Add to Cart

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Infinity Primus PR693C with Sound Damping

480W Peak (160W RMS) 6x9” Primus Series 2-Way Component Speakers + NVX SDSK2 Sound Damping

PR693C_SDSK2 big Out of stock
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Infinity Primus PR693C with Sound Damping

480W Peak (160W RMS) 6x9” Primus Series 2-Way Component Speakers + NVX SDSK2 Sound Damping

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Save 15% Off Package Deals at Checkout!
Fits select models only.
Add details to confirm fitment.
50
List price $218.69
-15% $184.94
Add to Cart

• 240 watts Peak Each, 80 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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    FAQ for Speakers in 1978 DeVille

    Q: Can I upgrade or change the Speakers in 1978 Cadillac DeVille?

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

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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

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