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1978 Cadillac DeVille

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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.

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

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.

Better sound with your factory radio

Better sound with a factory radio

Love your factory look or can't replace the stereo? We got you covered.

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The Install Bay SB50

8 AWG High Current Power and Ground Quick Disconnect

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The Install Bay SB50

8 AWG High Current Power and Ground Quick Disconnect

•8 AWG Power and Ground Quick Disconnect
• Color is Red
• Makes it easy to remove amps, batteries and other equipment quickly
• Requires 2 pieces to create connection

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-17% $9.99

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•8 AWG Power and Ground Quick Disconnect
• Color is Red
• Makes it easy to remove amps, batteries and other equipment quickly
• Requires 2 pieces to create connection

Install Bay IBCPLR2

4 AWG to 8 AWG Nickel Plated Wire Gauge Reducer

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Install Bay IBCPLR2

4 AWG to 8 AWG Nickel Plated Wire Gauge Reducer

• Wire Gauge Reducer
• 4 AWG to 8 AWG
• Nickel Plated
• Deep Wire Recesses
• Ultimate Power Delivery

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• Wire Gauge Reducer
• 4 AWG to 8 AWG
• Nickel Plated
• Deep Wire Recesses
• Ultimate Power Delivery

The Install Bay IB-CAP1F

1.0 Farad Digital Car Audio Capacitor

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The Install Bay IB-CAP1F

1.0 Farad Digital Car Audio Capacitor

• 1 Farad Capacitor
• Red Digital Voltage Display
• Perfect for Systems up to 1000 Watts
• 18 Volt Surge
• Silver
• Includes Mounting Hardware

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-10% $69.99

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• 1 Farad Capacitor
• Red Digital Voltage Display
• Perfect for Systems up to 1000 Watts
• 18 Volt Surge
• Silver
• Includes Mounting Hardware

Install Bay MC918-20 9-wire

20 ft. (6.1 meters) of Nine Conductor 18 AWG Twisted Multi-Use Cable

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Install Bay MC918-20 9-wire

20 ft. (6.1 meters) of Nine Conductor 18 AWG Twisted Multi-Use Cable

• 20ft. 9-Conductor 18 Gauge Twisted Multi-Use Wire
• Ideal for OEM Integration connections or 4-Channel speaker wiring
• Colored coded design eliminates confusion during installation

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• 20ft. 9-Conductor 18 Gauge Twisted Multi-Use Wire
• Ideal for OEM Integration connections or 4-Channel speaker wiring
• Colored coded design eliminates confusion during installation

Install Bay IBH3

H3 LED SINGLE BEAM PAIR

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Install Bay IBH3

H3 LED SINGLE BEAM PAIR

• Replacement LED headlight bulbs
• 3.1"
• Heat sink 1.26 inch

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List price $119.99
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• Replacement LED headlight bulbs
• 3.1"
• Heat sink 1.26 inch

Install Bay IBHPLUG1

1" Hole Plug Flush Black 1 7/16" Head Diameter - Pack of 100

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Install Bay IBHPLUG1

1" Hole Plug Flush Black 1 7/16" Head Diameter - Pack of 100

• 1" Hole Plug
• Mounts flush
• Color: Black
• 100 per package

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List price $14.99
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• 1" Hole Plug
• Mounts flush
• Color: Black
• 100 per package

The Install Bay IB200

200 Amp Battery Isolator and Relay

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The Install Bay IB200

200 Amp Battery Isolator and Relay

• Battery Isolator and Relay
• 200 Amp
• Prevents Primary Battery Discharge
• Maximizes the Current Transfer
• Extends Battery Life
• Universal 12V Applications

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• Battery Isolator and Relay
• 200 Amp
• Prevents Primary Battery Discharge
• Maximizes the Current Transfer
• Extends Battery Life
• Universal 12V Applications

Install Bay FLX14BLK

1/4" Expandable Sleeving, Black - 200 Feet

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Install Bay FLX14BLK

1/4" Expandable Sleeving, Black - 200 Feet

• 1/4" split-braid sleeving
• Protects wires, cables, hoses and more
• Great for automotive, marine or office applications
• 200 feet of tubing included
• Resists cuts and other abrasions

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• 1/4" split-braid sleeving
• Protects wires, cables, hoses and more
• Great for automotive, marine or office applications
• 200 feet of tubing included
• Resists cuts and other abrasions

Install Bay IBR68

Multipurpose Tester with 9V Tone Generator

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Install Bay IBR68

Multipurpose Tester with 9V Tone Generator

• All In One Tester/Tone Generator
• Speaker tester with 9V
• RCA cable tester
• Easy to use control knobs
• Auto off function

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• All In One Tester/Tone Generator
• Speaker tester with 9V
• RCA cable tester
• Easy to use control knobs
• Auto off function

Install Bay FLX18BLK

1/8in Expandable Sleeving, Black - 250 Feet

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Install Bay FLX18BLK

1/8in Expandable Sleeving, Black - 250 Feet

• 1/8" split-braid sleeving
• Protects wires, cables, hoses and more
• Great for automotive, marine or office applications
• 250 feet of tubing included
• Resists cuts and other abrasions

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List price $136.99
-10% $122.99

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• 1/8" split-braid sleeving
• Protects wires, cables, hoses and more
• Great for automotive, marine or office applications
• 250 feet of tubing included
• Resists cuts and other abrasions

Install Bay BNFD250F

Red Nylon 16/148 Gauge 0.250 Fully Insulated Nylon Female Quick Disconnect

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Install Bay BNFD250F

Red Nylon 16/148 Gauge 0.250 Fully Insulated Nylon Female Quick Disconnect

• Blue nylon female quick disconnect terminals
• Connects to male terminals with 0.250 size
• Accepts 16/14 AWG gauge wire
• Package of 100 pieces

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List price $15.99
-13% $13.99
Add to Cart

• Blue nylon female quick disconnect terminals
• Connects to male terminals with 0.250 size
• Accepts 16/14 AWG gauge wire
• Package of 100 pieces

Install Bay 3MHS1

3M Heat Shrink 1" Diameter Tubing 10 Pack

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Install Bay 3MHS1

3M Heat Shrink 1" Diameter Tubing 10 Pack

• 1"-6"
• 3M Heat Shrink tubing < /br>

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List price $20.99
-19% $16.99

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• 1"-6"
• 3M Heat Shrink tubing < /br>

Install Bay IBH10

LED Replacement Headlight Bulbs (Pair) - H10 LED SINGLE BEAM

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Install Bay IBH10

LED Replacement Headlight Bulbs (Pair) - H10 LED SINGLE BEAM

• Replacement LED headlight bulbs
• 3.1 inch (78.2mm) total length
• Heat sink 1.26 inch (32mm) diameter
• Good for tight applications
• Compact design doesn’t compromise performanc

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List price $55.99
-20% $44.99

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• Replacement LED headlight bulbs
• 3.1 inch (78.2mm) total length
• Heat sink 1.26 inch (32mm) diameter
• Good for tight applications
• Compact design doesn’t compromise performanc

Install Bay F6N050BK

1/2" Self-Wrapping Split Braid Sleeving, Black - 75FT

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Install Bay F6N050BK

1/2" Self-Wrapping Split Braid Sleeving, Black - 75FT

• 1/2" split-braid sleeving
• Protects wires, cables, hoses and more
• Protects against salt water, solvents, automotive chemicals and more
• More flexible than plastic
• Resists cuts and other abrasions

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• 1/2" split-braid sleeving
• Protects wires, cables, hoses and more
• Protects against salt water, solvents, automotive chemicals and more
• More flexible than plastic
• Resists cuts and other abrasions

Install Bay 3MHST1

3M Heat Shrink 1" Diameter Tubing Black

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Install Bay 3MHST1

3M Heat Shrink 1" Diameter Tubing Black

• 1 inch diameter
• 50 percent heat shrink tubing
• Length: 4 feet

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• 1 inch diameter
• 50 percent heat shrink tubing
• Length: 4 feet

Install Bay IBWTH12

Waterproof Connectors 12 Gauge - Each

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Install Bay IBWTH12

Waterproof Connectors 12 Gauge - Each

• Waterproof Connectors
• 2C Plug in Connector
• Male/Female
• 12 Gauge

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List price $7.99
-13% $6.99

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• Waterproof Connectors
• 2C Plug in Connector
• Male/Female
• 12 Gauge

Limited time!

The InstallBay AK02

0 Gauge Complete Amplifier Installation Kit

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The InstallBay AK02

0 Gauge Complete Amplifier Installation Kit

• 0 Gauge Amplifier Installation Kit
• Everything that you Need to Power an Amplifier up to 2000W!
• 17ft. 0 Gauge Blue Power Cable
• 3ft. 0 Gauge Black Ground Cable
• 17ft. Blue RCA Cable

15% off an NVX XCAP10H w/ Select Amp Kits
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• 0 Gauge Amplifier Installation Kit
• Everything that you Need to Power an Amplifier up to 2000W!
• 17ft. 0 Gauge Blue Power Cable
• 3ft. 0 Gauge Black Ground Cable
• 17ft. Blue RCA Cable

Install Bay 3MHST38

3M Heat Shrink 3/8" Diameter Tubing Black

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Install Bay 3MHST38

3M Heat Shrink 3/8" Diameter Tubing Black

• 3/8 inch heat shrink tubing
• Made with polyoefin (black)
• Length: 4 feet

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List price $9.99
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• 3/8 inch heat shrink tubing
• Made with polyoefin (black)
• Length: 4 feet

Install Bay IBR91

In-Dash USB and 3.5mm Aux input Knockout Panel

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Install Bay IBR91

In-Dash USB and 3.5mm Aux input Knockout Panel

• In-Dash Knockout Panel
• Adds 3.5mm Aux and USB Ports
• Installs in Dash

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List price $47.99
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• In-Dash Knockout Panel
• Adds 3.5mm Aux and USB Ports
• Installs in Dash

Install Bay 3MHST14

3M Heat Shrink 1/4" Diameter Tubing Black

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Install Bay 3MHST14

3M Heat Shrink 1/4" Diameter Tubing Black

• 1/4 inch heat shrink tubing
• Made with Polyoefin (black)
• Length: 4 feet

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List price $8.99
-11% $7.99

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• 1/4 inch heat shrink tubing
• Made with Polyoefin (black)
• Length: 4 feet

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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:

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