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2008 Cadillac CTS

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Overview Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Dads & Grads Sale

Speakers & Speaker Installation for 2008 Cadillac CTS

Find speakers to upgrade your sound and fit in the factory speaker location for your CTS.  After you choose your speakers, we'll help you find speaker adapters, speaker harnesses and other accessories for installation.

All car speakers

Shop All Speaker Locations in the Vehicle

See all speakers that fit, regardless of location.

Dash Corner

Dash Corner Speakers

Speakers for your dash corner

Front Door Panel Speakers

Front Door Speakers

Speakers for your front door panels

Rear Deck Corner

Rear Deck Corner Speakers

Speakers for your corner rear deck

Rear Door Panel Speakers

Rear Door Panel Speakers

Speakers for your rear door panels

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Speaker Size
Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
Design
The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
  Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.
Tweeter Design
Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
PRO-X Series (53)
Punch Series (41)
Reference Series (41)
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V Series (33)
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CS Series (26)
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A Series (23)
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Prime Series (21)
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C2 Series (18)
Mille Pro Series (18)
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Primus Series (18)
PRO Series (18)
DMD Series (17)
Kappa Series (17)
HEX Series (16)
Polk DB+ Series (16)
PRO-GM Series (15)
Status Series (15)
Uno Series (15)
S Series (14)
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PNW Series (13)
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RS Series (5)
VEX Series (5)
BASSREV Series (4)
C7 Series (4)
Colossus Classic Series (4)
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E-Series (4)
EPIC PRO Series (4)
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MM Series (4)
Pro Audio on Wheels Series (4)
Punch P3 Series (4)
Punch Pro Series (4)
R Series (4)
SA Series (4)
Signature Series (4)
Stage 2 Series (4)
Street Reference Pro (4)
Z Series (4)
8PRO Series (3)
Altitude Series (3)
Arena Series (3)
Black Hydra Series (3)
C6 Series (3)
D-Series (3)
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GT7 Series (3)
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MC Series (3)
Performance Series (3)
Prime Series (3)
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Punch P2 Series (3)
Q Series (3)
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Thunder Dome Series (3)
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FK Series (1)
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HEX Diamante Italia Series (1)
HEX Pro Diamante Italia Series (1)
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KS Speaker Series (1)
MR Series (1)
NEO SPL Series (1)
Stage 1 Series (1)
Stage 2 Gen 2 Series (1)
Stage One Series (1)
Symphony Series (1)
TNT Series (1)
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JVC CS-DF620

600W Peak (50W RMS) 6.5" DRVN DF Series 2-Way 4-ohm Shallow-Mount Coaxial Car Speakers

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JVC CS-DF620

600W Peak (50W RMS) 6.5" DRVN DF Series 2-Way 4-ohm Shallow-Mount Coaxial Car Speakers

• 300 watts Peak Each, 25 watts RMS Each
• 1" Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 86 dB

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List price $64.00
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Rockford Fosgate Punch P1V2-65

300W Peak (150W RMS) 6.5" Punch P1 Series 3 Way Coaxial 4-ohm Speakers

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Rockford Fosgate Punch P1V2-65

300W Peak (150W RMS) 6.5" Punch P1 Series 3 Way Coaxial 4-ohm Speakers

• 150 watts Peak Each, 75 watts RMS Each
• 3/4" Tetolon Inverted Dome tweeters
• 3/8" Polypropylene-Piezo super tweeters
• Mica reinforced Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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List price $239.99
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Cerwin-Vega V25

120W Peak (40W RMS) 2.5" Vega Series 2025 Edition Midrange 4-ohm Speakers

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Cerwin-Vega V25

120W Peak (40W RMS) 2.5" Vega Series 2025 Edition Midrange 4-ohm Speakers

• 60 watts Peak Each, 20 watts RMS Each
• Treated Paper cone material
• Impedance: 4 ohm
• Sensitivity: 83 dB

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Alpine BRV-S80C

300W Peak (100W RMS) 8" BassRev Series 2-Way 4-ohm Component Speaker System

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Alpine BRV-S80C

300W Peak (100W RMS) 8" BassRev Series 2-Way 4-ohm Component Speaker System

• 150 watts Peak Each, 50 watts RMS Each
• 3/4" Teteron Dome Tweeters
• Polypropylene-Mica cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB

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  • Front Door
1
List price $455.00
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PRV Audio 5MR450-NDY-4 (Sold Individually)

900W Peak (450W RMS) 5" MR Series Pro Audio Midrange 4-ohm Car Speaker

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PRV Audio 5MR450-NDY-4 (Sold Individually)

900W Peak (450W RMS) 5" MR Series Pro Audio Midrange 4-ohm Car Speaker

• 900 watts Peak, 450 watts RMS
• Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

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  • Rear Door
List price $137.39
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JL Audio C2-600

120W RMS 6" C2 Series 2-Way 4-ohm Component Speaker System

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JL Audio C2-600

120W RMS 6" C2 Series 2-Way 4-ohm Component Speaker System

• RMS Each
• 3/4" Silk Dome tweeters
• Mica Injected Polypropylene - MIPP cone material
• Impedance: 4 ohm
• Sensitivity: 90.5 dB

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$329.99 /set

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JL Audio C1-525x

100W RMS 5.25" C1 Series 2 Way Coaxial 4-ohm Car Speakers

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JL Audio C1-525x

100W RMS 5.25" C1 Series 2 Way Coaxial 4-ohm Car Speakers

• 50 watts RMS Each
• 3/4" Silk-Suspended Aluminum Edge Driven Dome tweeters
• Mineral-Filled Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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  • Rear Door
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$129.99 /pair

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Infinity Kappa 53XF (INFSPKKA53XFAM)

360W Peak (120W RMS) 5.25" Kappa Series 2-Way Coaxial 3-ohm Car Speakers

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Infinity Kappa 53XF (INFSPKKA53XFAM)

360W Peak (120W RMS) 5.25" Kappa Series 2-Way Coaxial 3-ohm Car Speakers

• 180 watts Peak Each, 60 watts RMS Each
• Silk Edge Driven Dome tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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  • Rear Door
List price $249.95
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Hertz CK 165L with Sound Damping

300W Peak (100W RMS) 6.5" Cento Series 2-Way Component Speaker system + NVX SDSK2 Sound Damping

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Hertz CK 165L with Sound Damping

300W Peak (100W RMS) 6.5" Cento Series 2-Way Component Speaker system + NVX SDSK2 Sound Damping

• 150 Watts Max Each, 50 Watts RMS Each
•Non Pressed Paper cone material
• Tetolon Tweeter dome
• 4 Ohm Impedance
• Sensitivity: 92 dB

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• 150 Watts Max Each, 50 Watts RMS Each
•Non Pressed Paper cone material
• Tetolon Tweeter dome
• 4 Ohm Impedance
• Sensitivity: 92 dB

JL Audio C6-653

200W RMS 6.5" C6 Series 3-Way 4-ohm Component Speaker System

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JL Audio C6-653

200W RMS 6.5" C6 Series 3-Way 4-ohm Component Speaker System

• 100 watts RMS Each
• 1" Silk Dome Tweeters
• Vacuum-formed Mineral-Filled Polypropylene cone
• Impedance: 4 ohm
• Sensitivity: 87.37 dB

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JBL Stage3 527 (STAGE3527AM)

400W Peak (80W RMS) 5.25” Stage3 Series 2 Way Coaxial 3-ohm Speakers

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JBL Stage3 527 (STAGE3527AM)

400W Peak (80W RMS) 5.25” Stage3 Series 2 Way Coaxial 3-ohm Speakers

• 200 watts Peak Each, 40 watts RMS Each
• Polypropylene cone material with Plus One woofer architecture
• Impedance: 3 ohm
• Sensitivity: 91 dB

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  • Rear Door
2
List price $109.95
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Kicker PSC65 (51PSC654)

240W Peak (120W RMS) 6.5" PS Series 2 Way Coaxial 4-ohm Marine and Powersports Speakers

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Kicker PSC65 (51PSC654)

240W Peak (120W RMS) 6.5" PS Series 2 Way Coaxial 4-ohm Marine and Powersports Speakers

• 120 watts Peak Each, 60 watts RMS Each
• 3/4" Titanium Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92.5 dB

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List price $219.99
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Massive Audio MX65S

440W Peak (100W RMS) 6.5" MX Series 2-Way 4-ohm Shallow-Mount Coaxial Car Speakers

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Massive Audio MX65S

440W Peak (100W RMS) 6.5" MX Series 2-Way 4-ohm Shallow-Mount Coaxial Car Speakers

• 220 watts Peak Each, 50 watts RMS Each
• 1/2" PEI (Polyetherimide) Hard Dome tweeters
• Tweeters constructed with ferro fluid cooled voice coil
• Laminate-Treated Paper cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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List price $65.99
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Hertz MLK 165.3 Legend

600W Peak (300W RMS) 6.5" Mille Legend Series 2-way 4-ohm Component Speaker System

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Hertz MLK 165.3 Legend

600W Peak (300W RMS) 6.5" Mille Legend Series 2-way 4-ohm Component Speaker System

• 300 watts Peak Each, 150 watts RMS Each
• Tetolon Dome tweeters
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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List price $1175.00
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DS18 ZXI-62C

480W Peak (240W RMS) 6.5" ZXI Series 2-way 4-ohm Component Speaker System

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DS18 ZXI-62C

480W Peak (240W RMS) 6.5" ZXI Series 2-way 4-ohm Component Speaker System

• 240 watts Peak Each, 120 watts RMS Each
• 1.25" Silk Dome tweeters
• Glass Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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Hertz MPX 165.3

400W Peak (200W RMS) 6.5" Mille Pro Series 2-Way Pro Audio Coaxial 4-ohm Speakers

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Hertz MPX 165.3

400W Peak (200W RMS) 6.5" Mille Pro Series 2-Way Pro Audio Coaxial 4-ohm Speakers

• 200 watts Peak Each, 100 watts RMS Each
• 1" Tetolon Soft Dome Tweeters
• Pressed Pulp with Cotton Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

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List price $470.00
$449.99 /pair

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Rockford Fosgate Punch P3 P3V2-69C3

300W Peak (150W RMS) 6x9" Punch P3 Series 3-Way 4-ohm Coax/Component Car Speaker System

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Rockford Fosgate Punch P3 P3V2-69C3

300W Peak (150W RMS) 6x9" Punch P3 Series 3-Way 4-ohm Coax/Component Car Speaker System

• 150 watts Peak Each, 75 watts RMS Each
• Santoprene Rubber half-roll speaker surround
• 20-40% Mica reinforced Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB

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  • Dash Corner
  • Rear Deck Corner
List price $635.99
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Hifonics HCC65C

300W Peak (150W RMS) 6.5" Colossus Classic Series 2 Way Component Speaker System

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Hifonics HCC65C

300W Peak (150W RMS) 6.5" Colossus Classic Series 2 Way Component Speaker System

• 150 watts Peak Each, 75 watts RMS Each
• 1" Aluminum Dome Tweeters
• Protective speaker grilles included
• Woven Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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List price $69.99
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Cerwin-Vega V65

720W Peak (240W RMS) 6.5" Vega Series 2025 Edition 2-Way Coaxial 4-ohm Speakers

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Cerwin-Vega V65

720W Peak (240W RMS) 6.5" Vega Series 2025 Edition 2-Way Coaxial 4-ohm Speakers

• 360 watts Peak Each, 120 watts RMS Each
• 3/4" Silk Balanced Dome Tweeters
• Carbon Fiber Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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$149.99 /pair

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AudioControl A65CS2

200W RMS 6.5" Altitude Series 4-ohm 2-Way Component Speaker System

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AudioControl A65CS2

200W RMS 6.5" Altitude Series 4-ohm 2-Way Component Speaker System

• 100 watts RMS Each
• 1-11/16" Silk Dome Tweeters
• Precision-Molded Glass Fiber cone
• Impedance: 4 ohm
• Sensitivity: 86.5 dB

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List price $179.00
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    FAQ for Speakers in 2008 CTS

    Q: Can I upgrade or change the Speakers in 2008 Cadillac CTS?

    A: Yes this page includes all the best Speakers that work in your CTS.

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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.

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