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2004 Mazda RX-8

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Overview Upgrade your Stereo 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 2004 Mazda RX-8

Find speakers to upgrade your sound and fit in the factory speaker location for your RX-8.  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.

Lower Front Door

Lower Front Door Speakers

Speakers for your lower front door.

Rear Deck Corner

Rear Deck Corner Speakers

Speakers for your corner rear deck

Rear Deck Tweeters

Rear Deck Tweeters

Speakers for your rear deck tweeters.

Upper Front Door Speakers

Upper Front Door Speakers

Speakers for your upper front door.

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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.
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Kenwood eXcelon KFC-X695

600W Peak (260W RMS) 6x9" eXcelon Series 2 Way Coaxial 3-ohm Car Speakers

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Kenwood eXcelon KFC-X695

600W Peak (260W RMS) 6x9" eXcelon Series 2 Way Coaxial 3-ohm Car Speakers

• 300 watts Peak Each, 130 watts RMS Each
• 1-3/16" Soft Dome Tweeters
• Injection Molded Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 84 dB

Free Speaker Accessory at Checkout!
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Install kits available for this speaker

found car based on your search
Fits the following location in your RX-8
  • Rear Deck Corner
List price $240.00
Save $76.00
-32% $164.00 /pair

In stock

Only 2 Left!

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See all 14 special offers

Kenwood KFC-6998RS

1440W Peak (300W RMS) 6x9" RS Series 5-Way Coaxial 4-ohm Car Speakers with Dual Super Tweeters

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Kenwood KFC-6998RS

1440W Peak (300W RMS) 6x9" RS Series 5-Way Coaxial 4-ohm Car Speakers with Dual Super Tweeters

• 720 watts Peak Each, 150 watts RMS Each
• 1-3/4" Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
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Save $10 on install kits for this speaker

found car based on your search
Fits the following location in your RX-8
  • Rear Deck Corner
List price $180.00
-17% $149.00 /pair

In stock

Add to Cart
See all 14 special offers

Kenwood KFC-C5798RS

640W Peak (160W RMS) 5x7" RS Series 2-Way Coaxial 4-ohm Car Speakers

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Kenwood KFC-C5798RS

640W Peak (160W RMS) 5x7" RS Series 2-Way Coaxial 4-ohm Car Speakers

• 320 watts Peak Each, 80 watts RMS Each
• 1-3/16" Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
List price $130.00
-16% $109.00 /pair

In stock

Only 2 Left!

Add to Cart
See all 12 special offers

Kenwood KFC-6988RS

1340W Peak (280W RMS) 6x9" RS Series 4-Way Coaxial 4-ohm Car Speakers with Dual Super Tweeters

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Kenwood KFC-6988RS

1340W Peak (280W RMS) 6x9" RS Series 4-Way Coaxial 4-ohm Car Speakers with Dual Super Tweeters

• 670 watts Peak Each, 140 watts RMS Each
• 1-3/4" Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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

Save $10 on install kits for this speaker

found car based on your search
Fits the following location in your RX-8
  • Rear Deck Corner
List price $170.00
-18% $139.00 /pair

In stock

Add to Cart
See all 14 special offers

Kenwood KFC-C6898RS

720W Peak (162W RMS) 6x8" RS Series 2-Way Coaxial 4-ohm Car Speakers

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Kenwood KFC-C6898RS

720W Peak (162W RMS) 6x8" RS Series 2-Way Coaxial 4-ohm Car Speakers

• 360 watts Peak Each, 81 watts RMS Each
• 1-3/16" Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
List price $130.00
-16% $109.00 /pair

In stock

Only 3 Left!

Add to Cart
See all 12 special offers
Limited time!

Kenwood KFC-C6866S

500W Peak (60W RMS) 6x8" Sport Series 2 Way Coaxial 4-ohm Car Speakers

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Kenwood KFC-C6866S

500W Peak (60W RMS) 6x8" Sport Series 2 Way Coaxial 4-ohm Car Speakers

• 250 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

Free Speaker Accessory at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
install icon

Free or discounted install kits when available.

Fits select models only.
Add details to confirm fitment.
3
List price $100.00
Save $31.00
-31% $69.00 /pair

In stock

Add to Cart
See all 12 special offers

Kenwood KFC-C6866S with Sound Damping

500W Peak (60W RMS) 6x8" Sport Series 2-way 4-ohm Coaxial Car Speakers + NVX SDBSK2 Premium Sound Damping

KFCC6866S_SDBSK2 big
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Kenwood KFC-C6866S with Sound Damping

500W Peak (60W RMS) 6x8" Sport Series 2-way 4-ohm Coaxial Car Speakers + NVX SDBSK2 Premium Sound Damping

• 250 watts Peak Each, 30 watts RMS Each
• 1" Balanced Dome tweeters with sound field enhancer
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

shipping truck icon Free shipping in USA. Provide zip for delivery date.
Fits select models only.
Add details to confirm fitment.
49
List price $118.74
-33% $79.49

In stock

Add to Cart

• 250 watts Peak Each, 30 watts RMS Each
• 1" Balanced Dome tweeters with sound field enhancer
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

Limited time!

Kenwood KFC-6996PS

1300W Peak (300W RMS) 6x9" Performance Series 5-way Dual 4-ohm Coaxial Car Speakers

KFC-6996PS big Out of stock
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Kenwood KFC-6996PS

1300W Peak (300W RMS) 6x9" Performance Series 5-way Dual 4-ohm Coaxial Car Speakers

• 650 watts Peak Each, 150 watts RMS Each
• 1-3/4" PEI (Polyetherimide) Balanced Dome tweeters
• 4/5" and 1/2" dual ceramic super tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

Free Speaker Accessory at Checkout!
install icon

Save $10 on install kits for this speaker

found car based on your search
Fits the following location in your RX-8
  • Rear Deck Corner
2
List price $150.00
-47% $79.99 /pair
Notify Me

• 650 watts Peak Each, 150 watts RMS Each
• 1-3/4" PEI (Polyetherimide) Balanced Dome tweeters
• 4/5" and 1/2" dual ceramic super tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

Kenwood KFC-6996PS with Sound Damping

1300W Peak (300W RMS) 6x9" Performance Series 5-way Dual 4-ohm Coaxial Car Speakers + NVX SDBSK2 Premium Sound Damping

KFC6996PS_SDBSK2 big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Kenwood KFC-6996PS with Sound Damping

1300W Peak (300W RMS) 6x9" Performance Series 5-way Dual 4-ohm Coaxial Car Speakers + NVX SDBSK2 Premium Sound Damping

• 650 watts Peak Each, 150 watts RMS Each
• 1-3/4" PEI (Polyetherimide) Balanced Dome tweeters
• 4/5" and 1/2" dual ceramic super tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

found car based on your search
Fits your RX-8
48
List price $168.74
-46% $90.48
Notify Me

• 650 watts Peak Each, 150 watts RMS Each
• 1-3/4" PEI (Polyetherimide) Balanced Dome tweeters
• 4/5" and 1/2" dual ceramic super tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

 
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    FAQ for Speakers in 2004 RX-8

    Q: Can I upgrade or change the Speakers in 2004 Mazda RX-8?

    A: Yes this page includes all the best Speakers that work in your RX-8.

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