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1981 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 1981 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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Install Bay IBR81

Waterproof ATC or Mini Anl Dual Fuse Holder

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Install Bay IBR81

Waterproof ATC or Mini Anl Dual Fuse Holder

• Waterproof Connector
• For Marine, Motorsports, ATV and Motorcycle Applications
• Brass Connector for Maximum Power Transfer
• Stainless Steel Wrench Included

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List price $35.99
-58% $14.99

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• Waterproof Connector
• For Marine, Motorsports, ATV and Motorcycle Applications
• Brass Connector for Maximum Power Transfer
• Stainless Steel Wrench Included

Install Bay 3MRNFD250F

3M Red 22/18 Gauge 0.250 Fully Insulated Nylon Female Quick Disconnect

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Install Bay 3MRNFD250F

3M Red 22/18 Gauge 0.250 Fully Insulated Nylon Female Quick Disconnect

• Female Quick Disconnects
• Accepts 22/18 gauge wire
• Nylon fully insulated
• Comes in pack of 100
• Connector Size: 0.250"
• Color: Red

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• Female Quick Disconnects
• Accepts 22/18 gauge wire
• Nylon fully insulated
• Comes in pack of 100
• Connector Size: 0.250"
• Color: Red

Install Bay L-IBVSTABL

12V 10A DC-DC Voltage Converter Stabilizer

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Install Bay L-IBVSTABL

12V 10A DC-DC Voltage Converter Stabilizer

• Voltage converter stabilizer
• Input voltage: DC 9 volts - 36 volts
• Output voltage: DC 12 volts
• Maximum output current: 10 amps

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List price $163.99
-10% $146.99

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• Voltage converter stabilizer
• Input voltage: DC 9 volts - 36 volts
• Output voltage: DC 12 volts
• Maximum output current: 10 amps

Metra IBSIRENM6

Universal 6-Tone Mini-Piezo Siren (Sold Individually)

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Metra IBSIRENM6

Universal 6-Tone Mini-Piezo Siren (Sold Individually)

• 6-tone Mini-Piezo Siren
• Designed for universal applications

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List price $18.99
-11% $16.99

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• 6-tone Mini-Piezo Siren
• Designed for universal applications

Install Bay IBWTH16

16 GA Waterproof 2 Conductor Plug-in Connector M/F 1 PC

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Install Bay IBWTH16

16 GA Waterproof 2 Conductor Plug-in Connector M/F 1 PC

• Quickly connect/disconnect applications easily in seconds
• Use this for power/ground and speaker wiring in Car, Marine, Motorcycle or Powersports applications
• Waterproof Connectors
• 2C Plug in Connector
• Male/Female
• 16 Gauge

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List price $6.99
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• Quickly connect/disconnect applications easily in seconds
• Use this for power/ground and speaker wiring in Car, Marine, Motorcycle or Powersports applications
• Waterproof Connectors
• 2C Plug in Connector
• Male/Female
• 16 Gauge

Install Bay IBR62

12 Gauge Pre-Wired Waterproof ATC Fuse Holder

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Install Bay IBR62

12 Gauge Pre-Wired Waterproof ATC Fuse Holder

• Pre-wired ATC Fuse Holder
• Waterproof design
• 12 Gauge wire

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List price $19.99
-10% $17.99

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• Pre-wired ATC Fuse Holder
• Waterproof design
• 12 Gauge wire

Install Bay IBR65

Bluetooth Audio Receiver Flush Mount

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Install Bay IBR65

Bluetooth Audio Receiver Flush Mount

• Bluetooth Audio Receiver Mount
• 3.5mm auxiliary input
• Independent volume and track controls

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• Bluetooth Audio Receiver Mount
• 3.5mm auxiliary input
• Independent volume and track controls

Install Bay MIBRBSY19

Universal 19mm Black Momentary Yellow LED Switch with Harness

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Install Bay MIBRBSY19

Universal 19mm Black Momentary Yellow LED Switch with Harness

• Black momentary switch with harness
• Rated at 5 amps
• IP67 waterproof rating
• 19mm (3/4") mounting hole size
• Yellow LED illuminated ring

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List price $13.48
-33% $8.99

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• Black momentary switch with harness
• Rated at 5 amps
• IP67 waterproof rating
• 19mm (3/4") mounting hole size
• Yellow LED illuminated ring

Install Bay ATMFP

In-line fuse holder, with jumpers you can create any distribution block

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Install Bay ATMFP

In-line fuse holder, with jumpers you can create any distribution block

• Ideal for marine use
• Acts as an in-line fuse holder with jumpers to create any distribution block
• Fused distribution or power/ground as you need
• Maximum amperage – 40 amps per circuit
• Maximum voltage – 32 volts DC

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List price $8.99
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• Ideal for marine use
• Acts as an in-line fuse holder with jumpers to create any distribution block
• Fused distribution or power/ground as you need
• Maximum amperage – 40 amps per circuit
• Maximum voltage – 32 volts DC

Install Bay IBLOC04

60W 4-Channel Adjustable Line Output Converter

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Install Bay IBLOC04

60W 4-Channel Adjustable Line Output Converter

• 4-Channel adjustable line output converter
• 60 watts of input power
• Fully adjustable dual output level controls
• Transformer design isolates ground loops

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• 4-Channel adjustable line output converter
• 60 watts of input power
• Fully adjustable dual output level controls
• Transformer design isolates ground loops

Install Bay ERS-126

3 Wire Relay Socket With Diode

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Install Bay ERS-126

3 Wire Relay Socket With Diode

• 3 Wire Relay Socket
• Includes Diode

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List price $4.99
-20% $3.99

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• 3 Wire Relay Socket
• Includes Diode

Install Bay RCAMRA-10 - Right Angle RCA Connectors

RCA Barrel Connector Mini Right Angle - 10-Pack

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Install Bay RCAMRA-10 - Right Angle RCA Connectors

RCA Barrel Connector Mini Right Angle - 10-Pack

• Male to Female RCA Right-Angle Adapters
• Package of 10 (5 Red - 5 Black)

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-13% $19.99

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• Male to Female RCA Right-Angle Adapters
• Package of 10 (5 Red - 5 Black)

Install Bay IBLEDBLF

Safety Flash Controller for LED Brake Light

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Install Bay IBLEDBLF

Safety Flash Controller for LED Brake Light

• Safety flash controller for LED brake light
• Flashes light and goes solid when brakes are applied
• Provides better visual warning

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List price $18.99
-11% $16.99

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• Safety flash controller for LED brake light
• Flashes light and goes solid when brakes are applied
• Provides better visual warning

Install Bay MIBRBSR19

Universal 19mm Black Momentary Red LED Switch with Harness

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Install Bay MIBRBSR19

Universal 19mm Black Momentary Red LED Switch with Harness

• Black momentary switch with harness
• Rated at 5 amps
• IP67 waterproof rating
• 19mm (3/4") mounting hole size
• Red LED illuminated ring

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List price $24.99
-12% $21.99

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Ships in 10-14 days

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• Black momentary switch with harness
• Rated at 5 amps
• IP67 waterproof rating
• 19mm (3/4") mounting hole size
• Red LED illuminated ring

Install Bay MIBRBSB19

Universal 19mm Black Momentary Blue LED Switch with Harness

MIBRBSB19 big
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Install Bay MIBRBSB19

Universal 19mm Black Momentary Blue LED Switch with Harness

• Black momentary switch with harness
• Rated at 5 amps
• IP67 waterproof rating
• 19mm (3/4") mounting hole size
• Blue LED illuminated ring

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Universal Icon Universal – fits most vehicles.

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List price $24.99
-12% $21.99

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Ships in 10-14 days

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• Black momentary switch with harness
• Rated at 5 amps
• IP67 waterproof rating
• 19mm (3/4") mounting hole size
• Blue LED illuminated ring

Install Bay 3MBNBG

3M Blue 16/14 Gauge Insul-Grip Seamless Butt Connectors

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Install Bay 3MBNBG

3M Blue 16/14 Gauge Insul-Grip Seamless Butt Connectors

• 100 Pack of Seamless Butt Connectors
• 16/14 Gauge
• Color: Blue
• Makes crimping wires fast and easy
• Offers a solid connection of wires

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$34.99

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• 100 Pack of Seamless Butt Connectors
• 16/14 Gauge
• Color: Blue
• Makes crimping wires fast and easy
• Offers a solid connection of wires

The Install Bay IB80

80 Amp Battery Isolator and Relay

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The Install Bay IB80

80 Amp Battery Isolator and Relay

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

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-12% $28.99

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

Install Bay IBR90

USB and HDMI Knockout Panel

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Install Bay IBR90

USB and HDMI Knockout Panel

• Knockout Panel for USB and HDMI
• Installs Indo Dash
• Cable: 4.5 Feet

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List price $65.99
-11% $58.99

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• Knockout Panel for USB and HDMI
• Installs Indo Dash
• Cable: 4.5 Feet

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 FMX-40

40 Amp USA Cooper Bussman FMX Fuse

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Install Bay FMX-40

40 Amp USA Cooper Bussman FMX Fuse

• USA Cooper Bussman FMX Fuse
• Universal application
• Fuse Size: 40 amp
• See-Through Windows
• High-Temperature Plastic Casings
• Circuit Protection
• High Conductivity

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List price $9.99
-10% $8.99
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• USA Cooper Bussman FMX Fuse
• Universal application
• Fuse Size: 40 amp
• See-Through Windows
• High-Temperature Plastic Casings
• Circuit Protection
• High Conductivity

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    FAQ for Universal-Fit Audio & Electronics in 1981 DeVille

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 1981 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
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    • Installation is smoother, faster, and frustration-free
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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

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