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2003 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 2003 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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DS18 VOC10PRO

Empty Dual 10" Vented Voceteo Speaker Enclosure with Speakon Cable

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Empty Dual 10" Vented Voceteo Speaker Enclosure with Speakon Cable

• Vented Dual 10" Speaker Enclosure
• 1/2" Medium Density Fiberboard (MDF) construction with black carpet finish
• 12 feet Speakon cable with 14-gauge OFC wire included
• Total box volume: 1.45 cubic feet

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$229.95

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Ships in 10-14 days

• Vented Dual 10" Speaker Enclosure
• 1/2" Medium Density Fiberboard (MDF) construction with black carpet finish
• 12 feet Speakon cable with 14-gauge OFC wire included
• Total box volume: 1.45 cubic feet

DS18 PRO-TWX1/BK

480W Peak (240W RMS) 3.8" 4-ohm Pro Audio Super Bullet Tweeters

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480W Peak (240W RMS) 3.8" 4-ohm Pro Audio Super Bullet Tweeters

• 3.8" Aluminum Super Bullet Tweeters
• 240 watts Peak Each
• 120 watts RMS Each
• 4 ohm Impedance

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$41.95

In stock

• 3.8" Aluminum Super Bullet Tweeters
• 240 watts Peak Each
• 120 watts RMS Each
• 4 ohm Impedance

DS18 LRING8

8" RGB LED Ring for Loudspeakers and Speakers

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8" RGB LED Ring for Loudspeakers and Speakers

• 8” RGB LED ring for speakers
• Sealed for all elements use
• 1/2" Spacer Depth
• 16 Million Different Hues of Light

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List price $43.99
-18% $35.95

In stock.

• 8” RGB LED ring for speakers
• Sealed for all elements use
• 1/2" Spacer Depth
• 16 Million Different Hues of Light

DS18 LRING12

12" RGB LED Ring for Loudspeakers and Speakers

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12" RGB LED Ring for Loudspeakers and Speakers

• 12” RGB LED ring for speakers
• Sealed for all elements use
• 1/2" Spacer Depth
• 16 Million Different Hues of Light
• Pre-drilled holes for easy installation

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List price $64.99
-17% $53.95

In stock.

• 12” RGB LED ring for speakers
• Sealed for all elements use
• 1/2" Spacer Depth
• 16 Million Different Hues of Light
• Pre-drilled holes for easy installation

DS18 IXS10.2D

1200W Peak (600W RMS) 10" IXS Series Dual 2-ohm Shallow Car Subwoofer

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1200W Peak (600W RMS) 10" IXS Series Dual 2-ohm Shallow Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Paper Cone
• Rubber Surround
• Mount depth: 3.66"
• Sensitivity: 84 dB

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$239.95

In stock

Only 1 Left!

DS18 EN28-28

28" Empty Dual 8" Speaker and 3.78" Tweeter Universal Speaker Enclosure

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28" Empty Dual 8" Speaker and 3.78" Tweeter Universal Speaker Enclosure

• Universal Dual 8" Sealed Water-Resistant Speaker Enclosure
• Fits 2 x 8" car speakers and 2 x 3.78" super tweeters
• Durable ABS Plastic construction
• IP65 Water-resistant rating
• Universal fit for cars, trucks, ATVs and UTVs

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$263.95

In stock.

• Universal Dual 8" Sealed Water-Resistant Speaker Enclosure
• Fits 2 x 8" car speakers and 2 x 3.78" super tweeters
• Durable ABS Plastic construction
• IP65 Water-resistant rating
• Universal fit for cars, trucks, ATVs and UTVs

DS18 PRO-DN22PY.8

800W Peak (200W RMS) 2" Throat 8-ohm Bolt-On Compression Driver with Polyimide Voice Coil

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800W Peak (200W RMS) 2" Throat 8-ohm Bolt-On Compression Driver with Polyimide Voice Coil

• 2" Throat compression driver
• Polyimide Diaphragm Material
• 800 watts Peak, 200 watts RMS
• 8 ohm Impedance

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List price $287.99
-17% $239.95

In stock.

• 2" Throat compression driver
• Polyimide Diaphragm Material
• 800 watts Peak, 200 watts RMS
• 8 ohm Impedance

Limited time!

DS18 SMD-3000.1D

3000W RMS Class D SMD Series Monoblock Car Amplifier with Bass Remote, VM-1 Voltmeter, and Digital LED Lights

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3000W RMS Class D SMD Series Monoblock Car Amplifier with Bass Remote, VM-1 Voltmeter, and Digital LED Lights

• 1300 watts x 1 channel @ 4 ohm
• 2200 watts x 1 channel @ 2 ohm
• 3000 watts x 1 channel @ 1 ohm
• Total RMS Power: 3000 watts
• Class D 1 ohm Stable Monoblock Amplifier

Save 30% off an NVX XKIT02 Amp Kit at Checkout!
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$799.95

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DS18 NXL-LRING6

6.5" RGB LED Ring for NXL and CF Series Marine and Powersports Speakers

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6.5" RGB LED Ring for NXL and CF Series Marine and Powersports Speakers

• 6.5" RGB LED ring for NXL and CF series marine speakers
• Sealed for all elements use
• 1/2" Spacer Depth
• 16 Million Different Hues of Light
• Ideal for car, pro, marine, jeep, and motorsports

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List price $43.99
-18% $35.95

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• 6.5" RGB LED ring for NXL and CF series marine speakers
• Sealed for all elements use
• 1/2" Spacer Depth
• 16 Million Different Hues of Light
• Ideal for car, pro, marine, jeep, and motorsports

DS18 PRO-D22TI.8

640W Peak (160W RMS) 2" Throat 8-ohm Bolt-on Titanium Compression Driver

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640W Peak (160W RMS) 2" Throat 8-ohm Bolt-on Titanium Compression Driver

• 2" Throat compression driver
• Titanium Diaphragm Material
• 640 watts Peak, 160 watts RMS
• 8 ohm Impedance

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List price $100.99
-17% $83.95

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• 2" Throat compression driver
• Titanium Diaphragm Material
• 640 watts Peak, 160 watts RMS
• 8 ohm Impedance

DS18 ZR6.4D

600W Peak (300W RMS) 6.5" ZR Series Dual 4-ohm Car Subwoofer

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600W Peak (300W RMS) 6.5" ZR Series Dual 4-ohm Car Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Non-Pressed Paper Cone
• Foam Surround
• Impedance: Dual 4 ohm
• Mount depth: 3.49"
• Sensitivity: 82 dB

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$95.95

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Limited time!

DS18 ZR800.4D

3600W Peak (1280W RMS) Class D ZR Series 4-Channel Car Amplifier

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3600W Peak (1280W RMS) Class D ZR Series 4-Channel Car Amplifier

• 200 watts x 4 channel @ 4 ohm
• 320 watts x 4 channel @ 2 ohm
• Bridged: 600 watts x 2 channel @ 4 ohm
• Total RMS Power: 1280 watts
• Class D 2 ohm Stable 4-Channel-Channel Amplifier

Save 30% off an NVX XKIT44 Amp Kit at Checkout!
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$383.95

In stock.


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DS18 SMD-8500.1D

8500W RMS Class D SMD Series Monoblock Car Amplifier with Bass Remote, VM-1 Voltmeter, and Digital LED Lights

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8500W RMS Class D SMD Series Monoblock Car Amplifier with Bass Remote, VM-1 Voltmeter, and Digital LED Lights

• 3300 watts x 1 channel @ 4 ohm
• 5700 watts x 1 channel @ 2 ohm
• 8500 watts x 1 channel @ 1 ohm
• Total RMS Power: 8500 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Wired bass level remote control included
• IR Remote Control for LED patterns and colors included

Save 30% off an NVX XKIT02 Amp Kit at Checkout!
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$1,699.95

In stock

Only 1 Left!


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NVX XKIT02

$179.99

$125.99

$54 Savings!

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Used from: $1,444.96

DS18 LRING6

6.5" RGB LED Ring for Loudspeakers and Speakers

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6.5" RGB LED Ring for Loudspeakers and Speakers

• 6.5” RGB LED ring for speakers
• Sealed for all elements use
• 1/2" Spacer Depth
• 16 Million Different Hues of Light

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List price $40.99
-17% $33.95

In stock.

• 6.5” RGB LED ring for speakers
• Sealed for all elements use
• 1/2" Spacer Depth
• 16 Million Different Hues of Light

DS18 SW-16GA-1000RB

1000 Ft. 16 Gauge High Performance Ultra Flex Speaker Wire (Red)

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1000 Ft. 16 Gauge High Performance Ultra Flex Speaker Wire (Red)

• 1000 feet 16 gauge Speaker Wire
• CCA (Copper-Clad Aluminum) material
• Wiring for high performance applications
• Ultra-flex wiring for high flex and extra durability
• Color: Red and Black

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List price $201.99
-17% $167.95

In stock.

• 1000 feet 16 gauge Speaker Wire
• CCA (Copper-Clad Aluminum) material
• Wiring for high performance applications
• Ultra-flex wiring for high flex and extra durability
• Color: Red and Black

DS18 EXL-XX12.4DHE

4000W Peak (2000W RMS) 12" EXL-X Series Dual 4-ohm Car Subwoofer

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4000W Peak (2000W RMS) 12" EXL-X Series Dual 4-ohm Car Subwoofer

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Paper Cone
• Foam Surround
• Impedance: Dual 4 ohm
• Mount depth: 7.87"
• Sensitivity: 87 dB

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$539.95

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DS18 ZR6.2D

600W Peak (300W RMS) 6.5" ZR Series Dual 2-ohm Car Subwoofer

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600W Peak (300W RMS) 6.5" ZR Series Dual 2-ohm Car Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Non-Pressed Paper Cone
• Foam Surround
• Impedance: Dual 2 ohm
• Mount depth: 3.49"
• Sensitivity: 82 dB

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$95.95

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DS18 IXS12.4S

1600W Peak (800W RMS) 12" IXS Series Single 4-ohm Shallow Car Subwoofer

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1600W Peak (800W RMS) 12" IXS Series Single 4-ohm Shallow Car Subwoofer

• Peak Power: 1600 watts
• RMS Power: 800 watts
• Paper Cone
• Rubber Surround
• Impedance: Single 4 ohm
• Mount depth: 4.33"
• Sensitivity: 85.1 dB

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$263.95

In stock

DS18 IXS10.4D

1200W Peak (600W RMS) 10" IXS Series Dual 4-ohm Shallow Car Subwoofer

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1200W Peak (600W RMS) 10" IXS Series Dual 4-ohm Shallow Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Paper Cone
• Rubber Surround
• Impedance: Dual 4 ohm
• Mount depth: 3.66"
• Sensitivity: 84 dB

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$239.95

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Used from: $167.96

DS18 GEN-X212LD

1800W Peak (900W RMS) Loaded Dual 12" Vented Subwoofer Enclosure

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1800W Peak (900W RMS) Loaded Dual 12" Vented Subwoofer Enclosure

• Ported enclosure with 2 12" Gen-X Subwoofer
• 450 watts RMS each (900 watts Peak each)
• Final Impedance: 4-ohm
• Dimensions: 38.58" L x 13.78" H x 11" W x 14" W2

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$455.95

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    FAQ for Universal-Fit Audio & Electronics in 2003 DeVille

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2003 Cadillac DeVille?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your DeVille.

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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.