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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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NVX XKIT42

Full Spec 4 Gauge 100% (OFC) Oxygen Free Copper Complete 2-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 1500 Watts

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Full Spec 4 Gauge 100% (OFC) Oxygen Free Copper Complete 2-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 1500 Watts

• Complete 4 Gauge Amplifier Installation Kit
• For Amplifiers Up To 1500 Watts RMS
• 100% (OFC) Oxygen Free Copper
• Dual Twisted Pair 2-Channel RCA Cable
• Tinned conductors for corrosion resistance
• Pre-terminated seamless power and ground ring terminals
• ANL/Mini-ANL Fuse Holder with 100 amp fuse
• CEA-2015 and BC5W2 Compliant

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124
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-24% $109.99

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Available Offers (2) for NVX XKIT42
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.
Used from: $83.99

Stinger SPT522

Gauge Reducer, 4 Gauge Input to 8 Gauge Pin

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Gauge Reducer, 4 Gauge Input to 8 Gauge Pin

• Gauge Reducer Adapter
• 4 Gauge Input to 8 Gauge Pin
• Deep Wire Recesses
• Ultimate Power Delivery
• Corrosion Resistant Chrome Plating

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List price $19.00
-47% $9.99

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• Gauge Reducer Adapter
• 4 Gauge Input to 8 Gauge Pin
• Deep Wire Recesses
• Ultimate Power Delivery
• Corrosion Resistant Chrome Plating

Escort Redline 360c

Radar and Laser Detector with Android Auto and Apple CarPlay Support

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Radar and Laser Detector with Android Auto and Apple CarPlay Support

• Multi-Band Radar and Laser Detection
• Graphic Color OLED display with current speed, vehicle voltage, and alert area monitors
• User, pilot, arrow and meter modes
• Directional arrows provide true 360-degree awareness
• Installs on the windshield

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List price $899.99
-11% $799.95

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• Multi-Band Radar and Laser Detection
• Graphic Color OLED display with current speed, vehicle voltage, and alert area monitors
• User, pilot, arrow and meter modes
• Directional arrows provide true 360-degree awareness
• Installs on the windshield

Metra 82-4300

1" Universal Spacer Rings for 6.5" to 6.75" Speakers

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1" Universal Spacer Rings for 6.5" to 6.75" Speakers

• Works with most 5 1/4", 6 1/2" and 6 3/4" speakers
• Gives 1 inch extra depth

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• Works with most 5 1/4", 6 1/2" and 6 3/4" speakers
• Gives 1 inch extra depth

Deaf Bonce MFA 4.180

1080W RMS Class D Machete Series 4 Channel Car Amplifier

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1080W RMS Class D Machete Series 4 Channel Car Amplifier

• 180 watts x 4 channel @ 4 ohm
• 270 watts x 4 channel @ 2 ohm
• Bridged: 540 watts x 2 channel @ 4 ohm
• Total RMS Power: 1080 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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$259.90

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Available Offers (2) for Deaf Bonce MFA 4.180
FREE Belva Amp Kit at Checkout!
Save 30% off an NVX XKIT44 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT44 Amp Kit! No code needed — discount applies automatically at checkout.

NVX XKIT82

Full Spec 8 Gauge 100% (OFC) Oxygen Free Copper Complete 2-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 800 Watts

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Full Spec 8 Gauge 100% (OFC) Oxygen Free Copper Complete 2-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 800 Watts

• Complete 8 Gauge Amplifier Installation Kit
• For Amplifiers Up To 800 Watts RMS
• 100% (OFC) Oxygen Free Copper
• Dual Twisted Pair 2-Channel RCA Cable
• Tinned conductors for corrosion resistance
• Pre-terminated seamless power and ground ring terminals
• ANL/Mini-ANL Fuse Holder with 60 amp fuse
• CEA-2015 and BC5W2 Compliant

3+ offers available
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-17% $79.99

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Available Offers (3) for NVX XKIT82
FREE NVX Amp Kit at Checkout!
Save 30% off an NVX XKIT82 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT82 Amp Kit! 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.
Used from: $55.99

Sundown Audio 4BLK

4-Gauge Heat Shrink for Cable Crimp Ends (Black, Pack of 10)

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4-Gauge Heat Shrink for Cable Crimp Ends (Black, Pack of 10)

• 10-pack 4-gauge Heat Shrink
• Protect your cable crimp ends with style
• Color: Black

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List price $6.59
-17% $5.49

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• 10-pack 4-gauge Heat Shrink
• Protect your cable crimp ends with style
• Color: Black

XS Power D3100

3000W 872 Ah Absorbent Glass Mat (AGM) Car Battery

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3000W 872 Ah Absorbent Glass Mat (AGM) Car Battery

• 12-volt Absorbent Glass Mat (AGM) Car Battery
• Sealed Absorbent Glass Mat (AGM) design
• Perfect for 4000W audio stereo systems
• Compatible with many Domestic and Japanese vehicles

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List price $549.99
-9% $499.99

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Crimestopper SP-402

1-Way Remote Start Keyless Entry Car Alarm System with (2) 1500 ft Range 5-Button LED Transmitters

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1-Way Remote Start Keyless Entry Car Alarm System with (2) 1500 ft Range 5-Button LED Transmitters

• 1-Way Remote Car Starter
• 5-Button LED Transmitter
• 1500 feet of range (0.28 miles)
• Dual 2-way data port
• Multi-vehicle functionality

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-68% $79.99

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• 1-Way Remote Car Starter
• 5-Button LED Transmitter
• 1500 feet of range (0.28 miles)
• Dual 2-way data port
• Multi-vehicle functionality

Scosche Tuneshare IUHPS

3.5 mm to 3.5 mm Headphone Audio Splitter

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3.5 mm to 3.5 mm Headphone Audio Splitter

• 3.5 mm to 3.5 mm Headphone Audio Splitter
• Allows for two people to listen to one audio source at once
• Length: 4.56" / 0.38 ft

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-20% $7.95

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• 3.5 mm to 3.5 mm Headphone Audio Splitter
• Allows for two people to listen to one audio source at once
• Length: 4.56" / 0.38 ft

Deaf Bonce MFA 2.420

1260W RMS Class D Machete Series 2 Channel Car Amplifier

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1260W RMS Class D Machete Series 2 Channel Car Amplifier

• 420 watts x 2 channel @ 4 ohm
• 630 watts x 2 channel @ 2 ohm
• Bridged: 1260 watts x 1 channel @ 4 ohm
• Total RMS Power: 1260 watts
• Class D 2 ohm Stable 2-Channel Amplifier

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$229.90

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Only 3 Left!

• 420 watts x 2 channel @ 4 ohm
• 630 watts x 2 channel @ 2 ohm
• Bridged: 1260 watts x 1 channel @ 4 ohm
• Total RMS Power: 1260 watts
• Class D 2 ohm Stable 2-Channel Amplifier

Limited time!

Kenwood DRV-A610WDP

LCD Compact 4K HD Front and Rear Dashboard Camera Package with Wi-Fi and GPS

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LCD Compact 4K HD Front and Rear Dashboard Camera Package with Wi-Fi and GPS

• 8.3 Megapixel Recording (front cam)
• 3.7 Megapixel Recording (rear cam)
• 3.0" LCD Display (front cam only)
• Integrated GPS system
• Touch panel control

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List price $380.00
Save $101.00
-27% $279.00

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• 8.3 Megapixel Recording (front cam)
• 3.7 Megapixel Recording (rear cam)
• 3.0" LCD Display (front cam only)
• Integrated GPS system
• Touch panel control

Tru Spec 6.5" Speaker Rings

6.5" MDF Speaker Rings (1 Pair) Tru Spec Series (Made in the USA)

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6.5" MDF Speaker Rings (1 Pair) Tru Spec Series (Made in the USA)

• Material: 0.75" MDF
• Inner Diameter: 5.85"
• Outer Diameter: 7.5"

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List price $12.99
-46% $6.99

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• Material: 0.75" MDF
• Inner Diameter: 5.85"
• Outer Diameter: 7.5"

Sound Extreme by ECOXGEAR SEI-SEWHP2

2 ft. Extreme LEDCast Lighting Whip and Controller

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2 ft. Extreme LEDCast Lighting Whip and Controller

• Extreme LEDCast Lighting Whip Kit with Controller
• Long range RF remote, and smartphone BLE app
• Create custom lighting presets
• IP66-rated for dirt and moisture resistance
• Optional light control to vehicle's brake, reverse and turn signals

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$129.99

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• Extreme LEDCast Lighting Whip Kit with Controller
• Long range RF remote, and smartphone BLE app
• Create custom lighting presets
• IP66-rated for dirt and moisture resistance
• Optional light control to vehicle's brake, reverse and turn signals

Directed 509U

Ultrasonic Sensor for Security Systems (DEI Install Essentials 509U)

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Ultrasonic Sensor for Security Systems (DEI Install Essentials 509U)

• Ultrasonic Sensor for Security Systems
• Detects air pressure changes in the cabin of the vehicle
• Detect thieves entering vehicle without glass breakage
• Adds extra protection when used in conjunction with other security systems

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-69% $29.00

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• Ultrasonic Sensor for Security Systems
• Detects air pressure changes in the cabin of the vehicle
• Detect thieves entering vehicle without glass breakage
• Adds extra protection when used in conjunction with other security systems

JBL BassPro SL 2 (SUBBPSL2AM)

125W RMS Loaded Single 8" Amplified Under-Seat Compact Subwoofer Enclosure

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125W RMS Loaded Single 8" Amplified Under-Seat Compact Subwoofer Enclosure

• 8" Amplified Loaded Subwoofer System
• 125 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control

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List price $429.95
-12% $379.95

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• 8" Amplified Loaded Subwoofer System
• 125 watts RMS
• Built-In Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control

Beat-Sonic VD2

1 Input to 2 Output Composite Video Splitter

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1 Input to 2 Output Composite Video Splitter

• 1 input for 2 output video signal splitter
• Hard aluminum body to protect the device
• Filters out incoming noises
• Small and compact size

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$85.99

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• 1 input for 2 output video signal splitter
• Hard aluminum body to protect the device
• Filters out incoming noises
• Small and compact size

Directed 504D

Stinger DoubleGuard Shock Sensor

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Stinger DoubleGuard Shock Sensor

• Stinger DoubleGuard Shock Sensor
• Adjustable Sensitivity
• Wire Harness Included

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-38% $19.99

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• Stinger DoubleGuard Shock Sensor
• Adjustable Sensitivity
• Wire Harness Included

Limited time!

Rockford Fosgate RFC10HB 10 Farad Hybrid Capacitor

Hybrid Digital Stiffening Capacitor and Distribution Block

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Hybrid Digital Stiffening Capacitor and Distribution Block

• 10 farad Hybrid Digital Capacitor
• Increases quality of sound
• Increases level of bass
• Platinum plated

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List price $709.99
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-25% $529.99

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• 10 farad Hybrid Digital Capacitor
• Increases quality of sound
• Increases level of bass
• Platinum plated

NVX VAD17001 v2 (VAD17001v2)

3400W Peak (1700W RMS) Class D V-Series Monoblock Car/Marine/Powersports Amplifier with Bass Remote

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3400W Peak (1700W RMS) Class D V-Series Monoblock Car/Marine/Powersports Amplifier with Bass Remote

• 800 watts x 1 channel @ 4 ohm
• 1350 watts x 1 channel @ 2 ohm
• 1700 watts x 1 channel @ 1 ohm
• Total RMS Power: 1700 watts
• Class D 1 ohm Stable Monoblock Amplifier

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-23% $259.99

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List price $335.99
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$220.99 with coupon | Price details
2026-06-30 23:59:00
Save 30% on an NVX XKIT42 Amp Kit with Purchase! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT42 Amp Kit! No code needed — discount applies automatically at checkout.
Used from: $177.27

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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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    • Owner's manual
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    • Vehicle produced after 2005: Inside driver's side door
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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.