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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 Independance Day 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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Tru Spec Single 6.5" and Sundown Audio SA-6.5 SW D4

Single 6.5" Vented Prefabricated Enclosure with 600W Peak (300W RMS) 6.5" SA Series Dual 4-ohm Car Subwoofer (SW-SA6.5SWD4)

SINGLE65_SA65SWD4 big
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Tru Spec Single 6.5" and Sundown Audio SA-6.5 SW D4

Single 6.5" Vented Prefabricated Enclosure with 600W Peak (300W RMS) 6.5" SA Series Dual 4-ohm Car Subwoofer (SW-SA6.5SWD4)

•6.5" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 0.30 cubic feet
• Compatible for Sundown SA65V2 and similar subwoofers (Sold separately)

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List price $367.98
-43% $209.98

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Add to Cart

•6.5" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 0.30 cubic feet
• Compatible for Sundown SA65V2 and similar subwoofers (Sold separately)

Tru Spec 3X10SUPB with 3x Sundown Audio SA-10 CL

Triple 10" Vented Prefabricated Enclosure with 2000W Peak (1000W RMS) 10" SA Classic Series Dual 4-ohm Car Subwoofer (SW-SACL10D4)

3X10SUPB_3X_SACL10D4 big
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Tru Spec 3X10SUPB with 3x Sundown Audio SA-10 CL

Triple 10" Vented Prefabricated Enclosure with 2000W Peak (1000W RMS) 10" SA Classic Series Dual 4-ohm Car Subwoofer (SW-SACL10D4)

• 10" Triple Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 3.50 cubic feet
• Computer-designed CNC cut

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Universal Icon Universal – fits most vehicles.

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2
List price $1551.96
-19% $1,259.96

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• 10" Triple Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 3.50 cubic feet
• Computer-designed CNC cut

Tru Spec S12 Elite XXL with Sundown Audio Z-12 v.6

Single 12" Vented Prefabricated Square Enclosure for Select Sundown Subwoofers with 6500W Peak 12" Z Series Dual 1-ohm Car Subwoofer

S12ELITEXXL_ZV612D1 big
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Tru Spec S12 Elite XXL with Sundown Audio Z-12 v.6

Single 12" Vented Prefabricated Square Enclosure for Select Sundown Subwoofers with 6500W Peak 12" Z Series Dual 1-ohm Car Subwoofer

• 12" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 2.50 cubic feet
• Compatible with select Sundown subwoofers (Sold separately)

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Universal Icon Universal – fits most vehicles.

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1
List price $1655.98
-17% $1,379.98

In stock.

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• 12" Single Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 2.50 cubic feet
• Compatible with select Sundown subwoofers (Sold separately)

Tru Spec S12 Elite XXL with Sundown Audio NS v.6

7000W Peak (3500W RMS) 12" Nightshade Series Dual 1-ohm Car Subwoofer with Empty Single 12" Vented Prefabricated Square Enclosure

S12ELITEXXL_NSV612D1 big
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Tru Spec S12 Elite XXL with Sundown Audio NS v.6

7000W Peak (3500W RMS) 12" Nightshade Series Dual 1-ohm Car Subwoofer with Empty Single 12" Vented Prefabricated Square Enclosure

• 12" Single Ported Subwoofer Enclosure
•3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 2.50 cubic feet
• Compatible with select Sundown subwoofers (Sold separately)

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

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1
List price $1715.98
-17% $1,429.98

In stock.

Add to Cart

• 12" Single Ported Subwoofer Enclosure
•3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 2.50 cubic feet
• Compatible with select Sundown subwoofers (Sold separately)

Tru Spec 4X8SUBP with 4x Sundown Audio SA-8 v.3 D4

Quad 8" Vented Prefabricated Enclosure with 1200W Peak (600W RMS) 8" SA Series Dual 4-ohm Car Subwoofer (SW-SAV38D4)

4X8SUPB_4X_SAV38D4 big Out of stock
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Tru Spec 4X8SUBP with 4x Sundown Audio SA-8 v.3 D4

Quad 8" Vented Prefabricated Enclosure with 1200W Peak (600W RMS) 8" SA Series Dual 4-ohm Car Subwoofer (SW-SAV38D4)

• 8" Quad Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 3.50 cubic feet
• Computer-designed CNC cut

Universal Icon Universal – fits most vehicles.

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4
List price $1839.95
-18% $1,499.95
Add to Cart

• 8" Quad Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 3.50 cubic feet
• Computer-designed CNC cut

Tru Spec 4X8SUBP and 4x Sundown Audio SA-8 v.3 D2

Quad 8" Vented Prefabricated Enclosure with 1200W Peak (600W RMS) 8" SA Series Dual 2-ohm Car Subwoofer (SW-SAV38D2)

4X8SUPB_4X_SAV38D2 big
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Tru Spec 4X8SUBP and 4x Sundown Audio SA-8 v.3 D2

Quad 8" Vented Prefabricated Enclosure with 1200W Peak (600W RMS) 8" SA Series Dual 2-ohm Car Subwoofer (SW-SAV38D2)

• 8" Quad Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 3.50 cubic feet
• Computer-designed CNC cut

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

6
List price $1839.95
-18% $1,499.95

In stock.

Add to Cart

• 8" Quad Ported Subwoofer Enclosure
• 3/4" Medium Density Fiberboard (MDF) construction
• Total box volume: 3.50 cubic feet
• Computer-designed CNC cut

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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:

    • 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.

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