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1978 Cadillac DeVille

Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

Universal-Fit Audio for 1978 Cadillac DeVille

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

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Metra 99-9999

ISO Trim Ring will Finish off a Double DIN Radio Installation

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ISO Trim Ring will Finish off a Double DIN Radio Installation

• For Finishing Off a Double DIN Radio Installation
• Can Also Finish off Two ISO Stacked Radios
• Trim Ring is Scored on Back for Easy Trimming
• Compatible with [[!afgShortRange]

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List price $31.99
-13% $27.99

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Only 3 Left!

• For Finishing Off a Double DIN Radio Installation
• Can Also Finish off Two ISO Stacked Radios
• Trim Ring is Scored on Back for Easy Trimming
• Compatible with [[!afgShortRange]

Metra 82-4203

6" - 6.75" Universal Speaker Adapter

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6" - 6.75" Universal Speaker Adapter

• Universal Speaker Adapters
• installation of 6 to 6.75 inch speakers
• Sold as Pair

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List price $33.99
-53% $15.99

In stock

• Universal Speaker Adapters
• installation of 6 to 6.75 inch speakers
• Sold as Pair

Metra 44-SHSH Antenna

8" Black Replacement Antenna Mast with 12 Adapters

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8" Black Replacement Antenna Mast with 12 Adapters

• 8" Black replacement antenna mast
• Fits into the original antenna location for AM/FM stations
• Easy removable mast design
• Includes 12 adapters to fit stereo connections

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List price $55.99
-54% $25.99

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• 8" Black replacement antenna mast
• Fits into the original antenna location for AM/FM stations
• Easy removable mast design
• Includes 12 adapters to fit stereo connections

Metra 82-4401

Universal 1/2" Speaker Adapter 6" to 6-3/4"

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Universal 1/2" Speaker Adapter 6" to 6-3/4"

• Universal 1/2" Speaker Adapter
• Color: Black
• High Grade ABS Plastic Construction
• Factory Matched Texture Style

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List price $34.99
-49% $17.99

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• Universal 1/2" Speaker Adapter
• Color: Black
• High Grade ABS Plastic Construction
• Factory Matched Texture Style

Metra 89-30-0250

Universal DIN 1/4" Border Trim

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Universal DIN 1/4" Border Trim

• Universal DIN 1/4" Border Trim
• Painted to match factory dash color
• High-Grade ABS plastic construction
• Factory style texture

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List price $7.99
-27% $5.81

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Only 3 Left!

• Universal DIN 1/4" Border Trim
• Painted to match factory dash color
• High-Grade ABS plastic construction
• Factory style texture

Metra 44-UA42 Antenna

Shark Fin Style Roof Mount Universal Amplified AM/FM Antenna

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Shark Fin Style Roof Mount Universal Amplified AM/FM Antenna

• Roof Mount Amplified Antenna
• Shark fin design for sleek installation
• Color: Black

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List price $166.99
-40% $99.99

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Only 3 Left!

• Roof Mount Amplified Antenna
• Shark fin design for sleek installation
• Color: Black

Metra 44-UT10 Antenna

Universal Top Mount Replacement Antenna for AM/FM Bands

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Universal Top Mount Replacement Antenna for AM/FM Bands

• Replacement Antenna for AM/FM Bands
• Top Mount Design Made For 1" Hole

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List price $49.99
-10% $44.99

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• Replacement Antenna for AM/FM Bands
• Top Mount Design Made For 1" Hole

Metra 44-UL09 Antenna

Universal Retractable Top-Mount Antenna

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Universal Retractable Top-Mount Antenna

• Retractable Top Mount Retractable Antenna
• 31" 4-Section Retractable Mast

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List price $44.99
-44% $24.99

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Only 3 Left!

• Retractable Top Mount Retractable Antenna
• 31" 4-Section Retractable Mast

Metra OH-DIN01

Empty Dual 6.5" Speakers and Single DIN Stereo Overhead Console Enclosure

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Empty Dual 6.5" Speakers and Single DIN Stereo Overhead Console Enclosure

• Empty Dual 6.5" Speakers and Single DIN Radio Overhead Console Enclosure
• Durable ABS plastic construction and matte black finish
• Accommodates one radio device and two speakers
• Water-resistant design

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List price $128.99
-10% $115.99

In stock

• Empty Dual 6.5" Speakers and Single DIN Radio Overhead Console Enclosure
• Durable ABS plastic construction and matte black finish
• Accommodates one radio device and two speakers
• Water-resistant design

Metra SG10

Universal Mesh Grille for Most 10" Speakers and Subwoofers

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Universal Mesh Grille for Most 10" Speakers and Subwoofers

• Universal 10" Speaker and Subwoofer Grille
• Designed for high-excursion speakers and subwoofers
• Satin black powder-coated finish
• Mounting hardware included

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List price $42.99
-12% $37.99

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• Universal 10" Speaker and Subwoofer Grille
• Designed for high-excursion speakers and subwoofers
• Satin black powder-coated finish
• Mounting hardware included

Metra 44-EC24 Antenna Extension

24" Universal Antenna Extension Cable

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24" Universal Antenna Extension Cable

• Universal Antenna Extender • Extends Antenna 24" (2 ft.)

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List price $11.99
-33% $7.99

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• Universal Antenna Extender • Extends Antenna 24" (2 ft.)

Metra 44-UA50 Antenna

Amplified Antenna for AM/FM Bands

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Amplified Antenna for AM/FM Bands

• European Amplified Antenna for AM/FM
• 8" 3-Section Black Retractable Mast

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List price $96.99
-66% $32.99

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• European Amplified Antenna for AM/FM
• 8" 3-Section Black Retractable Mast

Metra 82-4301

Universal 1" Speaker Spacer Rings for 6" to 6-3/4"

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Universal 1" Speaker Spacer Rings for 6" to 6-3/4"

• Universal 1" Speaker Spacer Rings for 6" to 6.75" Aftermarket Car Speakers
• Color: Black
• High Grade ABS Plastic Construction
• Factory Matched Texture Style

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List price $29.99
-50% $14.99

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• Universal 1" Speaker Spacer Rings for 6" to 6.75" Aftermarket Car Speakers
• Color: Black
• High Grade ABS Plastic Construction
• Factory Matched Texture Style

Metra MPS-UNDG-KT1

6 LED Tube Universal Underglow Chase Kit for UTV, ATV, and Golfcart

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6 LED Tube Universal Underglow Chase Kit for UTV, ATV, and Golfcart

• Underglow Chase Kit UTV, ATV, Golfcart
• Includes 6 sealed LED tubes, mounting hardware, and connect chasing controller
• Water-resistant Heise connector
• Includes Pro Controller, RF card remote

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List price $318.99
-10% $286.99

In stock.

• Underglow Chase Kit UTV, ATV, Golfcart
• Includes 6 sealed LED tubes, mounting hardware, and connect chasing controller
• Water-resistant Heise connector
• Includes Pro Controller, RF card remote

Metra MPS-RGBWWK

RGB Pod LED String Kit (Set of 4)

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RGB Pod LED String Kit (Set of 4)

• RGB LED Wheel Well Pod String Kit
• Four sets of LED pod string lights
• Two 72" extension cables
• Hideaway RGB controller Metra MPS-RGBC-4 included
• Control LED illumination with LED controller phone app

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List price $196.99
-10% $176.99

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• RGB LED Wheel Well Pod String Kit
• Four sets of LED pod string lights
• Two 72" extension cables
• Hideaway RGB controller Metra MPS-RGBC-4 included
• Control LED illumination with LED controller phone app

Metra MPS-WRM45

4.5" Digital LCD Mirror/Monitor

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4.5" Digital LCD Mirror/Monitor

• Water resistant rearview mirror with 4.5" monitor
• IP69K rating
• Two video inputs
• Signal sensing triggered
• Works with most aftermarket camera inputs

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List price $473.99
-10% $425.99

In stock.

• Water resistant rearview mirror with 4.5" monitor
• IP69K rating
• Two video inputs
• Signal sensing triggered
• Works with most aftermarket camera inputs

Metra 44-US07R Antenna

Side/Top Mount Replacement Antenna for AM/FM Bands

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Side/Top Mount Replacement Antenna for AM/FM Bands

• Side/Top Mount Replacement Antenna for 1" Hole Split Ball Applications
• 14" Removable Conductive Rubber Mast
• Mast Color: Black

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List price $38.99
-36% $24.99

In stock

Only 3 Left!

• Side/Top Mount Replacement Antenna for 1" Hole Split Ball Applications
• 14" Removable Conductive Rubber Mast
• Mast Color: Black

Metra JP-18AMP-2

4-Gauge Complete Amplifier Installation Kit and Brackets for Select 2018-up Vehicles from Jeep

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4-Gauge Complete Amplifier Installation Kit and Brackets for Select 2018-up Vehicles from Jeep

• 4 gauge Complete Amplifier Installation Kit
• Designed for select 2018-up select Jeep vehicles with non-amplified systems
• RCA interconnect cables included for the audio signal connection from the receiver to the amplifier
• Black powder-coated amplifier racks included

2+ offers available
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List price $609.00
-15% $517.99

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Ships in 10-14 days

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Available Offers (2) for Metra JP-18AMP-2
15% off an NVX XCAP10H w/ Select Amp Kits Add a qualifying amplifier to your cart and save 15% on the NVX XCAP10H Capacitor! No code needed — discount applies automatically at checkout.
15% off an NVX XCAP1F w/ Select Amp Kits Add a qualifying amplifier to your cart and save 15% on the NVX XCAP1F Capacitor! No code needed — discount applies automatically at checkout.

Metra 89-30-0500

Universal DIN 1/2" Border Trim

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Universal DIN 1/2" Border Trim

• Universal DIN 1/2" Border Trim
• Painted to match factory dash color
• High-Grade ABS plastic construction
• Factory style texture

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List price $7.99
-6% $7.49

In stock

• Universal DIN 1/2" Border Trim
• Painted to match factory dash color
• High-Grade ABS plastic construction
• Factory style texture

Metra 89-30-0750

Universal DIN 3/4" Border Trim

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Universal DIN 3/4" Border Trim

• Universal DIN 3/4" Border Trim
• Painted to match factory dash color
• High-Grade ABS plastic construction
• Factory style texture

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List price $7.99
-31% $5.52

In stock

Only 2 Left!

• Universal DIN 3/4" Border Trim
• Painted to match factory dash color
• High-Grade ABS plastic construction
• Factory style texture

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    FAQ for Universal-Fit Audio & Electronics in 1978 DeVille

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 1978 Cadillac DeVille?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics 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
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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.