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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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Dads & Grads Sale

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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 REF697F (2-Pairs, 4-Total)

1200W Peak (400W RMS) 6x9" Reference Series 2-way 4-ohm Speakers (2-Pairs)

REF697F_2 big
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Infinity REF697F (2-Pairs, 4-Total)

1200W Peak (400W RMS) 6x9" Reference Series 2-way 4-ohm Speakers (2-Pairs)

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

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6
List price $339.90
-18% $279.90

In stock

Only 2 Left!

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

Infinity PR9693M (2-Pairs, 4-Total)

720W Peak (240W RMS) 6x9” Coaxial Car Speakers (2-Pairs)

PR9693M_2 big
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Infinity PR9693M (2-Pairs, 4-Total)

720W Peak (240W RMS) 6x9” Coaxial Car Speakers (2-Pairs)

• 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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1
List price $359.90
-17% $299.92

In stock

Only 1 Left!

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

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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1
List price $899.90
-38% $559.98

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• 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 Primus PR5012IS (PR5012ISAM) (2-Pairs, 4-Total)

480W Peak (160W RMS) 5.25" Primus Series 2-Way Coaxial Car Speakers (2-Pairs)

PR5012ISAM_2 big
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Infinity Primus PR5012IS (PR5012ISAM) (2-Pairs, 4-Total)

480W Peak (160W RMS) 5.25" Primus Series 2-Way Coaxial Car Speakers (2-Pairs)

• 120 watts Peak Each, 40 watts RMS Each
• Textile Edge-driven Dome Tweeters
• Polypropylene cone material
• Impedance: 2.7
• Sensitivity: 88 dB

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List price $239.90
-54% $109.90

In stock

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• 120 watts Peak Each, 40 watts RMS Each
• Textile Edge-driven Dome Tweeters
• Polypropylene cone material
• Impedance: 2.7
• Sensitivity: 88 dB

Infinity REF607FSL (INFSPKRF607FSLUS) + REF697MF (INFSPKRF697MFUS)

110W RMS 6.5" Reference Series 2-way 3-ohm + 200W RMS 6x9" Reference Series 3-way 4-ohm Coaxial Car Speakers

REF607FSL_REF697MF big
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Infinity REF607FSL (INFSPKRF607FSLUS) + REF697MF (INFSPKRF697MFUS)

110W RMS 6.5" Reference Series 2-way 3-ohm + 200W RMS 6x9" Reference Series 3-way 4-ohm 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
• Includes 6x9" Reference Speakers

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4
List price $339.90
-18% $279.47 /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
• Includes 6x9" Reference Speakers

Infinity Kappa 693M (INFSPKKA693MAM) (2-Pairs, 4-Total)

1440W Peak (480W RMS) Kappa Series 6x9” 3-Way Speakers (2-Pairs)

KAPPA693M_2 big
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Infinity Kappa 693M (INFSPKKA693MAM) (2-Pairs, 4-Total)

1440W Peak (480W RMS) Kappa Series 6x9” 3-Way Speakers (2-Pairs)

• 360 watts Peak Each, 120 watts RMS Each
• Silk Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 94 dB

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6
List price $699.90
-31% $479.90

In stock

Only 2 Left!

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• 360 watts Peak Each, 120 watts RMS Each
• Silk Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 94 dB

Infinity Kappa 603CF (2-Pairs, 4-Total)

1320W Peak (440W EMS) 6.5" Kappa Series 2-way Component Speaker System (2-Pairs)

KAPPA603CF_2 big
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Infinity Kappa 603CF (2-Pairs, 4-Total)

1320W Peak (440W EMS) 6.5" Kappa Series 2-way Component Speaker System (2-Pairs)

• 330 watts Peak Each, 110 watts RMS Each
• 3/4" Silk Edge-driven Dom Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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6
List price $999.90
-28% $719.90

In stock

Only 2 Left!

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• 330 watts Peak Each, 110 watts RMS Each
• 3/4" Silk Edge-driven Dom Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 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

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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 REF697F with Sound Damping

600W Peak (200W RMS) 6x9" Reference Series 2-way 4-ohm Speakers + NVX SDSK2 Sound Damping

REF697F_SDSK2 big
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Infinity REF697F with Sound Damping

600W Peak (200W RMS) 6x9" Reference Series 2-way 4-ohm 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!
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Fits select models only.
Add details to confirm fitment.
54
List price $188.69
-18% $154.94

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 REF507F with Installation Accessories

270W Peak (90W RMS) 5.25" Reference Series 2-way 3-ohm Speakers + 5.25" Speaker Baffles + Sound Damping, Roller and Panel Removal Kit

REF507F_ACC_KIT big
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Infinity REF507F with Installation Accessories

270W Peak (90W RMS) 5.25" Reference Series 2-way 3-ohm Speakers + 5.25" Speaker Baffles + Sound Damping, Roller and Panel Removal Kit

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

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229
List price $212.66
-29% $150.51

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 503CF (PR503CF) with Sound Damping

300W Peak (100W RMS) 5.25” Primus Series 2-Way Component Speaker System + NVX SDSK2 Sound Damping

PR503CF_SDSK2 big
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Infinity Primus 503CF (PR503CF) with Sound Damping

300W Peak (100W RMS) 5.25” Primus Series 2-Way Component Speaker System + NVX SDSK2 Sound Damping

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

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49
List price $168.69
-20% $134.94

In stock

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

Infinity Reference REF-5030cx with Sound Damping

390W Peak (130W RMS) Reference Series 5.25” Component Speaker System + NVX SDSK2 Sound Damping

REF5030CXAM_SDSK2 big
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Infinity Reference REF-5030cx with Sound Damping

390W Peak (130W RMS) Reference Series 5.25” Component Speaker System + NVX SDSK2 Sound Damping

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

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49
List price $268.69
-54% $124.94

In stock

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

Infinity Primus 503CF (PR503CF) (2-Pairs, 4-Total)

600W Peak (200W RMS) 5.25” Primus Series 2-Way Component Speaker System (2-Pairs)

PR503CF_2 big
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Infinity Primus 503CF (PR503CF) (2-Pairs, 4-Total)

600W Peak (200W RMS) 5.25” Primus Series 2-Way Component Speaker System (2-Pairs)

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

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1
List price $299.90
-20% $239.90

In stock

Only 2 Left!

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

Infinity Primus PR5012IS (PR5012ISAM) with Sound Damping

240W Peak (80W RMS) 5.25" Primus Series 2-Way Coaxial Car Speakers + NVX SDSK2 Sound Damping

PR5012ISAM_SDSK2 big
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Infinity Primus PR5012IS (PR5012ISAM) with Sound Damping

240W Peak (80W RMS) 5.25" Primus Series 2-Way Coaxial Car Speakers + NVX SDSK2 Sound Damping

• 120 watts Peak Each, 40 watts RMS Each
• Textile Edge-driven Dome Tweeters
• Polypropylene cone material
• Impedance: 2.7
• Sensitivity: 88 dB

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48
List price $138.69
-50% $69.94

In stock

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• 120 watts Peak Each, 40 watts RMS Each
• Textile Edge-driven Dome Tweeters
• Polypropylene cone material
• Impedance: 2.7
• Sensitivity: 88 dB

Infinity Primus 503F (2-Pairs, 4-Total)

960W Peak (320W RMS) Primus Series 5.25” 2-Way Coaxial Car Speakers (2-Pairs)

PR503F_2 big
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Infinity Primus 503F (2-Pairs, 4-Total)

960W Peak (320W RMS) Primus Series 5.25” 2-Way Coaxial Car Speakers (2-Pairs)

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

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List price $199.90
-30% $139.90

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Only 1 Left!

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

Infinity Kappa 693M with Speaker Installation Kit

Includes: (2) 6" x 9" 3-Way speaker, 2 Piece Foam Speaker Ring Kit, Sound Damping Kit, Installer Panel Removal Tool Kit, Rubber Roller

INFSPKKA693MAM, XBAF69, SDRLR1, SDSK2, BTK106 big
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Infinity Kappa 693M with Speaker Installation Kit

Includes: (2) 6" x 9" 3-Way speaker, 2 Piece Foam Speaker Ring Kit, Sound Damping Kit, Installer Panel Removal Tool Kit, Rubber Roller

• 360 watts Peak Each, 120 watts RMS Each
• Silk Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 94 dB

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Free or discounted install kits when available.

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193
List price $442.66
-35% $286.27 /pair

In stock

Add to Cart

• 360 watts Peak Each, 120 watts RMS Each
• Silk Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 94 dB

Infinity REF407F (2-Pairs, 4-Total)

420W Peak (140W RMS) 4" Reference Series 2-way 3-ohm Coaxial Speakers (2-Pairs)

REF407F_2 big
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Infinity REF407F (2-Pairs, 4-Total)

420W Peak (140W RMS) 4" Reference Series 2-way 3-ohm Coaxial Speakers (2-Pairs)

• 105 watts Peak Each, 35 watts RMS Each
• 1/2" Textile Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

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Fits your DeVille
List price $279.90
-21% $219.90

In stock

Only 3 Left!

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• 105 watts Peak Each, 35 watts RMS Each
• 1/2" Textile Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 92 dB

Infinity REF507F (2-Pairs, 4-Total)

540W Peak (180W RMS) 5.25" Reference Series 2-way 3-ohm Speakers (2-Pairs)

REF507F_2 big
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Infinity REF507F (2-Pairs, 4-Total)

540W Peak (180W RMS) 5.25" Reference Series 2-way 3-ohm Speakers (2-Pairs)

• 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!
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1
List price $279.90
-21% $219.90

In stock

Only 2 Left!

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 Reference REF-5030cx (2-Pairs, 4-Total)

780W Peak (260W RMS) Reference Series 5.25” Component Speaker System (2-Pairs)

REF5030CXAM_2 big
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Infinity Reference REF-5030cx (2-Pairs, 4-Total)

780W Peak (260W RMS) Reference Series 5.25” Component Speaker System (2-Pairs)

• 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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1
List price $499.90
-56% $219.90

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 Primus 603F (INFSPKPR603C) with PR9693M (INFSPKPR693M)

300W Peak (100W RMS) 6.5” Primus Series 2-way 3-ohm + 360W Peak (120W RMS) 6x9” 3-way 3-ohm Coaxial Car Speakers

PR603F_PR9693M big
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Infinity Primus 603F (INFSPKPR603C) with PR9693M (INFSPKPR693M)

300W Peak (100W RMS) 6.5” Primus Series 2-way 3-ohm + 360W Peak (120W RMS) 6x9” 3-way 3-ohm Coaxial Car Speakers

• 150 watts Peak Each, 50 watts RMS Each
• 1/2" Silk Edge-driven Dome tweeters
• Polypropylene cone material with Plus One woofer cone architecture
• 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.
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Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
8
List price $289.90
-21% $229.91

In stock

Only 2 Left!

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• 150 watts Peak Each, 50 watts RMS Each
• 1/2" Silk Edge-driven Dome tweeters
• Polypropylene cone material with Plus One woofer cone architecture
• Impedance: 3 ohm
• Sensitivity: 92 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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    Shop your 1978 DeVille
    Why Use a Vehicle Fit Guide?
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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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