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2009 Cadillac STS

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 2009 Cadillac STS

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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Install Bay IBBAF65

Acoustic Speaker Baffles 6.5 inch - Pair

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Acoustic Speaker Baffles 6.5 inch - Pair

• 6.5" Acoustic Speaker Baffles
• Sold in Pairs
• Enhances sound quality of speakers
• Protects Rear of Speakers From Rain, etc.
• Trim for Enhanced Bass Response

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your STS
12
List price $13.99
-14% $11.99

In stock

• 6.5" Acoustic Speaker Baffles
• Sold in Pairs
• Enhances sound quality of speakers
• Protects Rear of Speakers From Rain, etc.
• Trim for Enhanced Bass Response

Install Bay IBBAF60

6.5" Foam Acoustic Speaker Baffles

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6.5" Foam Acoustic Speaker Baffles

• Foam Acoustic Speaker Baffles
• Fits 6.5" Speakers
• Improves Speaker Performance
• Protects Rear of Speaker Against Moisture

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found car based on your search
Fits your STS
5
List price $14.99
-13% $12.99

In stock

• Foam Acoustic Speaker Baffles
• Fits 6.5" Speakers
• Improves Speaker Performance
• Protects Rear of Speaker Against Moisture

Cerwin-Vega VT1

360W Peak (120W RMS) 1" Vega Series 2025 Edition 4-ohm Tweeters with External Crossovers

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360W Peak (120W RMS) 1" Vega Series 2025 Edition 4-ohm Tweeters with External Crossovers

• 1" VEGA Series Tweeters
• 180 watts Peak Each
• 60 watts RMS Each
• 4 ohm Impedance
• Includes external crossovers

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Install kits available for most vehicles

found car based on your search
Fits the following location in your STS
$99.99 /pair

In stock

The Install Bay VXT65

XTC 6-1/2" Round Small Frame Foam Acoustic Speaker Baffles

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XTC 6-1/2" Round Small Frame Foam Acoustic Speaker Baffles

• Small Frame Speaker Baffles
• For 6-1/2" Speakers
• Made from a Waterproof Foam
• Greatly Enhances the Sound and Performance of the Speakers
• Reduces Panel Vibration

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found car based on your search
Fits your STS
22
List price $25.99
-12% $22.99

In stock

Only 2 Left!

• Small Frame Speaker Baffles
• For 6-1/2" Speakers
• Made from a Waterproof Foam
• Greatly Enhances the Sound and Performance of the Speakers
• Reduces Panel Vibration

DS18 DXQTS

120W Peak (60W RMS) 2" DXQ Series 4-ohm Tweeters

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120W Peak (60W RMS) 2" DXQ Series 4-ohm Tweeters

• 2" DXQ Series Tweeters
• 60 watts Peak Each
• 30 watts RMS Each
• 4 ohm Impedance

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Install kits available for most vehicles

found car based on your search
Fits the following location in your STS
$79.95 /pair

In stock

• 2" DXQ Series Tweeters
• 60 watts Peak Each
• 30 watts RMS Each
• 4 ohm Impedance

Massive Audio FT1

200W Peak (100W RMS) 0.78" FT Series 4-ohm Dome Tweeters

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200W Peak (100W RMS) 0.78" FT Series 4-ohm Dome Tweeters

• 13/16" FT Series Tweeters
• 100 watts Peak Each
• 50 watts RMS Each
• 4 ohm Impedance

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Install kits available for most vehicles

found car based on your search
Fits the following location in your STS
List price $69.99
-21% $54.99 /pair

Available

Ships in 10-14 days

• 13/16" FT Series Tweeters
• 100 watts Peak Each
• 50 watts RMS Each
• 4 ohm Impedance

JL Audio M6-100CT-C/S-GmTi

300W Peak (150W RMS) 1" M6 Series Component 4-ohm Tweeters (Sport Gray)

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300W Peak (150W RMS) 1" M6 Series Component 4-ohm Tweeters (Sport Gray)

• 1" M6 Series Tweeters
• 150 watts Peak Each
• 75 watts RMS Each
• 4 ohm Impedance

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VIP Product Get $23.00 in rewards to spend later

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Install kits available for most vehicles

found car based on your search
Fits the following location in your STS
List price $249.99
-8% $229.99 /pair

Available

Ships in 10-14 days

• 1" M6 Series Tweeters
• 150 watts Peak Each
• 75 watts RMS Each
• 4 ohm Impedance

NVX XBAF65 Silicone Baffle Speaker Accessory Kit

2 Piece 6.5" / 6.75" Weatherproof Silicone Rubber Speaker Baffle Kit with 1.38 Square Feet of Sound Dampening Material (Two 10" x 10" Pieces)

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2 Piece 6.5" / 6.75" Weatherproof Silicone Rubber Speaker Baffle Kit with 1.38 Square Feet of Sound Dampening Material (Two 10" x 10" Pieces)

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Foldable design allows for varying depths

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your STS
163
List price $53.73
-38% $33.28

In stock

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Foldable design allows for varying depths

American Bass SYMPHONY 2.5

300W Peak (150W RMS) 2.5" Symphony Series Component Car Tweeters

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300W Peak (150W RMS) 2.5" Symphony Series Component Car Tweeters

• 2-1/2" Symphony Series Dome Tweeters
• 150 watts Peak Each
• 75 watts RMS Each
• 4 ohm Impedance

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Install kits available for most vehicles

found car based on your search
Fits the following location in your STS
List price $114.24
-20% $91.39 /pair

In stock.

JL Audio M6-100CT-C/S-GwGm

300W Peak (150W RMS) 1" M6 Series Component 4-ohm Tweeters (Sport Gray)

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300W Peak (150W RMS) 1" M6 Series Component 4-ohm Tweeters (Sport Gray)

• 1" M6 Series Tweeters
• 150 watts Peak Each
• 75 watts RMS Each
• 4 ohm Impedance

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

VIP Product Get $23.00 in rewards to spend later

install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your STS
$229.99 /pair

Available

Ships in 10-14 days

• 1" M6 Series Tweeters
• 150 watts Peak Each
• 75 watts RMS Each
• 4 ohm Impedance

DS18 PRO-SDF6R

6.5" Round Loudspeaker and Speaker Horn Diffuser

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6.5" Round Loudspeaker and Speaker Horn Diffuser

• 6.5" Loudspeaker and Speaker Horn Diffuser
• Sharper projection, great for Line Array speakers
• Wide 90-degree dispersion
• Made with durable ABS construction
• Designed for easy bolt-on installation

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your STS
$54.95

In stock

Only 2 Left!

• 6.5" Loudspeaker and Speaker Horn Diffuser
• Sharper projection, great for Line Array speakers
• Wide 90-degree dispersion
• Made with durable ABS construction
• Designed for easy bolt-on installation

DS18 SQT1

120W Peak (30W RMS) 1.3" Multi-Mount 4-ohm Dome Tweeters

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120W Peak (30W RMS) 1.3" Multi-Mount 4-ohm Dome Tweeters

• 1.3" Tweeters
• 60 watts Peak Each
• 15 watts RMS Each
• 4 ohm Impedance

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install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your STS
List price $57.99
-17% $47.95 /pair

In stock.

• 1.3" Tweeters
• 60 watts Peak Each
• 15 watts RMS Each
• 4 ohm Impedance

DS18 PRO-SDF6

6.5" Square Bolt-on Midrange Speaker Diffuser Horn

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6.5" Square Bolt-on Midrange Speaker Diffuser Horn

• 6.5" loudspeaker horn diffuser
• Comes with 4-M4 Nut-Inserts
• Bolt-on installation type
• 90° rounded sound coverage
• Made with durable ABS plastic

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your STS
List price $53.99
-17% $44.95

Available

Ships in 10-14 days

• 6.5" loudspeaker horn diffuser
• Comes with 4-M4 Nut-Inserts
• Bolt-on installation type
• 90° rounded sound coverage
• Made with durable ABS plastic

DS18 DXTC

200W Peak (50W RMS) 2" 4-ohm Dome Tweeters with External Passive Crossover

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200W Peak (50W RMS) 2" 4-ohm Dome Tweeters with External Passive Crossover

• 2" Tweeters
• 100 watts Peak Each
• 25 watts RMS Each
• 4 ohm Impedance

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VIP Product Get $48.00 in rewards to spend later

install icon

Install kits available for most vehicles

found car based on your search
Fits the following location in your STS
List price $575.99
-17% $479.95 /pair

In stock.

• 2" Tweeters
• 100 watts Peak Each
• 25 watts RMS Each
• 4 ohm Impedance

Install Bay IBSBF65-B

2 Piece Speaker Baffle Kit 6.5 Inch - 10 Pair Bulk Pack

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2 Piece Speaker Baffle Kit 6.5 Inch - 10 Pair Bulk Pack

• 2 Piece Speaker Baffle Kit 6.5 Inch
• 10 Pair Bulk Pack
• Designed to improve the directional flow of sound waves and focus them into the cabin
• Perfectly seals the speaker against the interior panel
• Offers waterproof protection for the speakers
• Better sealing for better sound

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VIP Product Get $33.40 in rewards to spend later

found car based on your search
Fits your STS
List price $371.99
-10% $333.99

Available

Ships in 10-14 days

• 2 Piece Speaker Baffle Kit 6.5 Inch
• 10 Pair Bulk Pack
• Designed to improve the directional flow of sound waves and focus them into the cabin
• Perfectly seals the speaker against the interior panel
• Offers waterproof protection for the speakers
• Better sealing for better sound

Limited time!

NVX XBAF65 (Like New (Open Box))

2 Piece 6.5" or 6.75" Weatherproof Silicone Rubber Speaker Baffle Kit

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2 Piece 6.5" or 6.75" Weatherproof Silicone Rubber Speaker Baffle Kit

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Foldable design allows for varying depths

10% Off Open Box!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your STS
List price $34.99
-49% $17.99
$16.19 with coupon | Price details

In stock

Only 3 Left!

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Foldable design allows for varying depths

Limited time!

NVX XBAF65 (Open Box, Great)

2 Piece 6.5" or 6.75" Weatherproof Silicone Rubber Speaker Baffle Kit

XBAF65 big
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2 Piece 6.5" or 6.75" Weatherproof Silicone Rubber Speaker Baffle Kit

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Foldable design allows for varying depths

10% Off Open Box!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your STS
2
List price $34.99
-56% $15.39
$13.85 with coupon | Price details

In stock

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Foldable design allows for varying depths

Limited time!

NVX XBAF65 Premium Speaker Accessory Kit

2 Piece 6.5" / 6.75" Weatherproof Silicone Rubber Speaker Baffle Kit + NVX SDBSK2 Premium Sound Damping

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2 Piece 6.5" / 6.75" Weatherproof Silicone Rubber Speaker Baffle Kit + NVX SDBSK2 Premium Sound Damping

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Foldable design allows for varying depths

Free Speaker Accessory Kit at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your STS
163
List price $53.73
-35% $34.99

In stock

Limited time!

NVX FRING65 (Like New (Open Box))

2 Piece 6.5" / 6.75" Self-Adhesive Foam Speaker Ring Baffle Kit

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2 Piece 6.5" / 6.75" Self-Adhesive Foam Speaker Ring Baffle Kit

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Easy peel and stick installation

10% Off Open Box!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your STS
List price $19.99
-24% $15.29
$13.76 with coupon | Price details

In stock

Only 2 Left!

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Easy peel and stick installation

NVX XBAF65 Baffle Accessory Kit

6.5" Weatherproof Silicone Rubber Speaker Baffle Kit and Sound Damping Speaker Kit (Two 10" x 10" Pieces)

xbaf65_sdsk2_bacc_kit big
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6.5" Weatherproof Silicone Rubber Speaker Baffle Kit and Sound Damping Speaker Kit (Two 10" x 10" Pieces)

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Foldable design allows for varying depths

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your STS
163
List price $53.73
-35% $34.99

In stock

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Foldable design allows for varying depths

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    FAQ for Universal-Fit Audio & Electronics in 2009 STS

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2009 Cadillac STS?

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

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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

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    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.