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1971 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 1971 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 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

(2) Alpine W10S4 10" Bass Subwoofers + Belva 3000W Amplifier + 4 Gauge Amp Kit

750W Max 10" Single 4 ohm Car Subwoofer Package (Includes 2 Subs, Amp, and Amp Kit)

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750W Max 10" Single 4 ohm Car Subwoofer Package (Includes 2 Subs, Amp, and Amp Kit)

• 750W Max
• 250W RMS
• Polypropylene-Mica cone
• High-excursion poly-foam surround
• High-strength custom steel frame
• Progressive Wavelit Ribs (P.W.R.) cone design

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82
List price $489.98
-26% $364.88

In stock

• 750W Max
• 250W RMS
• Polypropylene-Mica cone
• High-excursion poly-foam surround
• High-strength custom steel frame
• Progressive Wavelit Ribs (P.W.R.) cone design

PRV Audio TW700Ti

480W Peak (240W RMS) 4" Pro Audio Super Bullet Tweeter (Sold Individually)

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480W Peak (240W RMS) 4" Pro Audio Super Bullet Tweeter (Sold Individually)

• 4" Pro-Audio Bullet Tweeters
• 480 watts Peak Each
• 240 watts RMS Each
• 8 ohm Impedance

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List price $49.89
-20% $39.91

In stock

Only 2 Left!

• 4" Pro-Audio Bullet Tweeters
• 480 watts Peak Each
• 240 watts RMS Each
• 8 ohm Impedance

Limitless Lithium LL-IR500A

500A Battery Isolator and Relay

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500A Battery Isolator and Relay

• 500-amp Relay and Battery Isolator
• High current isolation relay designed for adding a secondary battery
• Prevents primary battery discharge when the vehicle engine is off
• Maximum Contact Rating: 500 amps
• Mechanical Life Cycle: 100000

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$79.00

In stock

Only 1 Left!

• 500-amp Relay and Battery Isolator
• High current isolation relay designed for adding a secondary battery
• Prevents primary battery discharge when the vehicle engine is off
• Maximum Contact Rating: 500 amps
• Mechanical Life Cycle: 100000

JL Audio XD-BTS Battery Terminal

Ultra-Compact Universal Brass Battery Connector Terminal with Marine-Grade Stannum Plating - Positive or Negative

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Ultra-Compact Universal Brass Battery Connector Terminal with Marine-Grade Stannum Plating - Positive or Negative

• Ultra-Compact Battery Connector, Positive or Negative
• 10 - 4 Gauge
• High-Temperature Polycarbonate Cover
• Marine-Grade Stannum Plating

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$44.99

In stock

Only 2 Left!

• Ultra-Compact Battery Connector, Positive or Negative
• 10 - 4 Gauge
• High-Temperature Polycarbonate Cover
• Marine-Grade Stannum Plating

Metra IBWRD88

Dual 8-Gauge to 8-Gauge Input Wire Reducers

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Dual 8-Gauge to 8-Gauge Input Wire Reducers

• Dual 8-gauge input and output to 8-gauge wire reducer
• Machined brass construction with Chrome finish
• Designed for aftermarket audio upgrades in any vehicle

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List price $24.99
-12% $21.99

Available

Ships in 10-14 days

• Dual 8-gauge input and output to 8-gauge wire reducer
• Machined brass construction with Chrome finish
• Designed for aftermarket audio upgrades in any vehicle

Viper 2103V

1-Way Keyless Entry Car Alarm System with 4-Button Transmitter

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1-Way Keyless Entry Car Alarm System with 4-Button Transmitter

• 1-Way Keyless Entry Car Alarm System
• 4-Button Transmitter
• 1/4 mile (1320 feet) range

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List price $139.99
-14% $119.99

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• 1-Way Keyless Entry Car Alarm System
• 4-Button Transmitter
• 1/4 mile (1320 feet) range

NVX XWS1650

50 ft 16-Gauge EnvyFlex 100% Oxygen Free Copper (OFC) Speaker Wire (Blue/Gray)

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50 ft 16-Gauge EnvyFlex 100% Oxygen Free Copper (OFC) Speaker Wire (Blue/Gray)

• True Spec 16 gauge EnvyFlex Speaker Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue and Gray
• Twisted-pair technology eliminates noise

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37
List price $39.99
-25% $29.99

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• True Spec 16 gauge EnvyFlex Speaker Wire
• Silver-tinned OFC (100% Oxygen-Free Copper) material
• Color: Blue and Gray
• Twisted-pair technology eliminates noise

Metra 44-EC144 Antenna Extension

12 ft. (144") Antenna Extension Cable with Impedance Matching Capacitors

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12 ft. (144") Antenna Extension Cable with Impedance Matching Capacitors

• Extension cable perfect when installing an FM modulated multi-disc CD changer, or other FM modulated tuner like a Satellite Radio box
• Also works with hideaway "brain" units from multimedia receivers

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-41% $9.99

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Only 2 Left!

• Extension cable perfect when installing an FM modulated multi-disc CD changer, or other FM modulated tuner like a Satellite Radio box
• Also works with hideaway "brain" units from multimedia receivers

Cerwin-Vega CVMP1.0

200W Peak (100W RMS) 1” Pro Series 4-ohm Pro Audio Bullet Tweeters

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200W Peak (100W RMS) 1” Pro Series 4-ohm Pro Audio Bullet Tweeters

• 1" Titanium Compression Bullet Tweeters
• 100 watts Peak Each
• 50 watts RMS Each
• 4 ohm Impedance

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List price $159.99
-19% $129.99

In stock.

• 1" Titanium Compression Bullet Tweeters
• 100 watts Peak Each
• 50 watts RMS Each
• 4 ohm Impedance

JL Audio M-MCPv3-SM

ETXv3 Enclosed Speaker System Fixture, for surface/deck mounting & Four Winns Tower

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ETXv3 Enclosed Speaker System Fixture, for surface/deck mounting & Four Winns Tower

• JL Audio Tower Speaker Mounting Kit
• Clamp is intended for Surface/deck Mounting and Four Winns mounting only
• For M-Series and MX-Series JL Audio Tower Speakers

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$169.99

In stock

Only 2 Left!

• JL Audio Tower Speaker Mounting Kit
• Clamp is intended for Surface/deck Mounting and Four Winns mounting only
• For M-Series and MX-Series JL Audio Tower Speakers

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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2
List price $9.99
-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

JL Audio JD1000/1

1000W RMS Class D JD Series Monoblock Car Amplifier

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1000W RMS Class D JD Series Monoblock Car Amplifier

• 600 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• Total RMS Power: 1000 watts
• Class D 2 ohm Stable Monoblock Amplifier

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$429.99

In stock

Used from: $365.49

Omega AU-70SL (AU-70)

Multi-Tone Siren with 20 watt output

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Multi-Tone Siren with 20 watt output

• Single or Multi-Tone Siren
• Six Tone Siren
• 20 watt Output

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16
List price $19.99
-45% $10.99

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Ships in 10-14 days

• Single or Multi-Tone Siren
• Six Tone Siren
• 20 watt Output

Limited time!

Belva BAHNGM

Surface Mount Flange for use with BAWPL, BA2USB, BAVTM

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Surface Mount Flange for use with BAWPL, BA2USB, BAVTM

• Surface Mount Flange for use with BAWPL, BA2USB, BAVTM

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List price $1.99
-50% $0.99

In stock

• Surface Mount Flange for use with BAWPL, BA2USB, BAVTM

Directed 504K

OEM Interface Stinger with LED Valet Switch Pod

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OEM Interface Stinger with LED Valet Switch Pod

• OEM Alarm Shock Sensor Upgrade Kit
• Allows factory alarm systems to detect impacts to the vehicle
• Designed to interface for factory alarms extra sensor input

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2
List price $94.99
-47% $49.99

• OEM Alarm Shock Sensor Upgrade Kit
• Allows factory alarm systems to detect impacts to the vehicle
• Designed to interface for factory alarms extra sensor input

Cobra PX650

Splashproof Pro Business 2-Way Walkie Talkies (2-Pack)

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Splashproof Pro Business 2-Way Walkie Talkies (2-Pack)

• Pro Business 2-Way Walkie Talkies
• IP54-rated splashproof and weather-resistant
• 22 Channels and 88 Privacy Codes
• Voice-Activated Transmission (VOX)
• 18-hour lithium-ion battery

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List price $155.99
-17% $129.95

In stock

Only 1 Left!

• Pro Business 2-Way Walkie Talkies
• IP54-rated splashproof and weather-resistant
• 22 Channels and 88 Privacy Codes
• Voice-Activated Transmission (VOX)
• 18-hour lithium-ion battery

Sundown Audio M-12 D2 12" (M12D2)

4000W Peak (2000W RMS) 12" M Series Dual 2-ohm Car Subwoofer (SW-M12D2)

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4000W Peak (2000W RMS) 12" M Series Dual 2-ohm Car Subwoofer (SW-M12D2)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• High Roll Foam Surround
• Mount depth: 10.88"
• Sensitivity: 80.6 dB

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List price $719.99
-17% $599.99

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JL Audio M-SWMCPv3-2.250

ETXv3 Enclosed Speaker System Swivel Mount Fixture, for pipe diameter of 2.50 inches

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ETXv3 Enclosed Speaker System Swivel Mount Fixture, for pipe diameter of 2.50 inches

• JL Audio Tower Speaker Mounting Kit
• Clamp has an Inner Diameter of 2.50 Inches
• For JL Audio M880-ETXv3, M770-ETXv3 and MX770-ETXv3 speaker models

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$299.99

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• JL Audio Tower Speaker Mounting Kit
• Clamp has an Inner Diameter of 2.50 Inches
• For JL Audio M880-ETXv3, M770-ETXv3 and MX770-ETXv3 speaker models

Belva BRT438

4 Gauge Ring Terminals, 3/8" Opening with Nickel Plated Brass - 5 Pieces (3 Red & 2 Black)

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4 Gauge Ring Terminals, 3/8" Opening with Nickel Plated Brass - 5 Pieces (3 Red & 2 Black)

• Ring Terminals
• 3/8" Opening
• 4 Gauge
• 3 Red & 2 Black
• Nickel Plated
• Resealable Polybag

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List price $9.99
-70% $2.99

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• Ring Terminals
• 3/8" Opening
• 4 Gauge
• 3 Red & 2 Black
• Nickel Plated
• Resealable Polybag

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    FAQ for Universal-Fit Audio & Electronics in 1971 DeVille

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 1971 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
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
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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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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.