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Car Speakers for your 2004 A4 Quattro

Upgrading your factory car speakers to a quality pair of aftermarket car speakers will allow you to hear music in a whole new way. You'll be able to hear the high, background notes better, as well as the rich deep bass as the artist intended. Here you will find a wide selection of replacement and component car speakers for sale from name brand manufacturers.

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Select Increments JLJT-Pods (Alpine Audio System) with NSP65

Custom-fit 6.5" Sound Bar enclosures with Coaxial Speakers

SI-30JLJTAEN big
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Custom-fit 6.5" Sound Bar enclosures with Coaxial Speakers

• Designed for 6.5" / 6.75" speakers
• Fits factory sound bar speaker locations
• No need to remove or cut up your sound bar
• Work Alpine Audio system only
• Includes Two Enclosures

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93
List price $267.94
-14% $229.94

In stock.

• Designed for 6.5" / 6.75" speakers
• Fits factory sound bar speaker locations
• No need to remove or cut up your sound bar
• Work Alpine Audio system only
• Includes Two Enclosures

(4) Hifonics ZS65CXS 6.5" 1200 Watt Shallow Mount Car Stereo Speakers

600W Peak (100W RMS) Pair of 6.5" Zeus Shallow Mount 2-way coaxial car speakers Package

ZS65CXS,ZS65CXS big
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600W Peak (100W RMS) Pair of 6.5" Zeus Shallow Mount 2-way coaxial car speakers Package

• 300 Watts Max Each, 50 Watts RMS Each
&bull 1" Neo-Mylar Dome Tweeter
• Alpha-Cellulose Midwoofer Cone
• 4 Ohm Impedance
• Sensitivity: 88 dB
• Mounting Depth: 1.65"

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19
List price $69.98
-11% $61.98

In stock

Only 2 Left!

• 300 Watts Max Each, 50 Watts RMS Each
&bull 1" Neo-Mylar Dome Tweeter
• Alpha-Cellulose Midwoofer Cone
• 4 Ohm Impedance
• Sensitivity: 88 dB
• Mounting Depth: 1.65"

Fits Chevy Silverado Pickup 1999-2006 Factory Speaker Upgrade TSG1345R TSG4620S

Simple plug and play installation, no cutting required

(2) 72-4568,82-3002,TS-G4620S,TS-G1320S big
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No Fit Icon Doesn't fit your A4 Quattro

42
List price $178.97
-42% $104.15

In stock

400W 6x9" 3-Way CS Series Coaxial Car Speakers Package

Crunch 800 Watts 6 x 9 Inches 3-Way 4-Ohm Coaxial CS Speakers (2 Pack)

CS693,CS693 big
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Crunch 800 Watts 6 x 9 Inches 3-Way 4-Ohm Coaxial CS Speakers (2 Pack)

• Peak Power: 400W
• RMS Power: 200W
• Neo Mylar Soft Dome Tweeter
• Impedance: 4 ohm
• Cellulose Cone and Rubber Surround

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26
List price $99.98
-38% $61.98

In stock

• Peak Power: 400W
• RMS Power: 200W
• Neo Mylar Soft Dome Tweeter
• Impedance: 4 ohm
• Cellulose Cone and Rubber Surround

02-11-TOYOTA-CAMRY-KRDSPKG big
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Fits select 2002-2011 Camry

• Rear Deck Kicker 6" x 9" Coaxial Speakers
• Metra Speaker Adapters and Harnesses
• Plug-n-play Installation

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45
List price $197.97
-28% $141.94

In stock

• Rear Deck Kicker 6" x 9" Coaxial Speakers
• Metra Speaker Adapters and Harnesses
• Plug-n-play Installation

Infinity Kappa 63XF (2-Pairs, 4-Total)

1020W Peak (340W RMS) 6.5" Kappa Series 2-Way Coaxial Speakers with Silk Dome Tweeters (2-Pairs)

KAPPA63XF_2 big
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1020W Peak (340W RMS) 6.5" Kappa Series 2-Way Coaxial Speakers with Silk Dome Tweeters (2-Pairs)

• 255 watts Peak Each, 85 watts RMS Each
• Silk Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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10
List price $599.90
-33% $399.90

In stock

• 255 watts Peak Each, 85 watts RMS Each
• Silk Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

Infinity Primus 603CF (PR603CF) (2-Pairs, 4-Total)

720W Peak (240W RMS) 6.5" Primus Series 2-Way Component Speakers (2-Pairs)

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720W Peak (240W RMS) 6.5" Primus Series 2-Way Component Speakers (2-Pairs)

• 180 watts Peak Each, 60 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

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1
List price $319.90
-19% $259.90

In stock

Only 1 Left!

• 180 watts Peak Each, 60 watts RMS Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

(4) JVC CS-DR620 6.5" 600 Watt 2-Way Car Audio Speakers

(4) JVC CS-DR620 6.5" 600 Watt 2-Way Car Audio Speakers

CS-DR621,CS-DR621 big
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(4) JVC CS-DR620 6.5" 600 Watt 2-Way Car Audio Speakers

• 300 Watts Max Each, 50 Watts RMS Each
• Poly-Ether Imide Balanced Tweeter
• Carbon Mica Woofer Cone
• 4 Ohm Impedance
• Frequency Response: 85-23,800 Hz

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41
List price $238.00
-21% $188.00

In stock

Only 3 Left!

• 300 Watts Max Each, 50 Watts RMS Each
• Poly-Ether Imide Balanced Tweeter
• Carbon Mica Woofer Cone
• 4 Ohm Impedance
• Frequency Response: 85-23,800 Hz

Lowest price in 30 days

NVX Complete N-Series Speaker Upgrade Kit for 1987-1996 Ford Bronco

Pair of 6.5" & 6x8" NVX N-Series Speaker Upgrade Kit with Metra Harnesses | Fits select 1987-1996 Bronco

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Pair of 6.5" & 6x8" NVX N-Series Speaker Upgrade Kit with Metra Harnesses | Fits select 1987-1996 Bronco

  • NVX NSP65 540W Peak (180W RMS) 6.5-Inch N-Series 2-Way Coaxial Car Speakers
  • NSP68 540W Peak (180W RMS) 6x8-Inch N-Series 2-Way Coaxial Car Speakers
  • Metra 72-5512 Speaker Harnesses for Simple Installation
  • Designed for Crystal Clear Audio and Enhanced Power Handling
  • Complete Speaker Upgrade Kit Includes 6.5-Inch and 6x8-Inch Coaxials with Wiring Harnesses
2+ offers available
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152
List price $229.96
-43% $130.40

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List price $229.96
-43% $130.40
$117.36 with coupon | Price details
2026-06-28 23:59:00
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2026-07-27 11:08:20

Hertz DCX690.3 (2-Pairs, 4-Total)

720W Peak (360W RMS) 6x9" Dieci Series 3-Way Coaxial Car Speakers (2-Pairs)

DCX6903_2 big
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720W Peak (360W RMS) 6x9" Dieci Series 3-Way Coaxial Car Speakers (2-Pairs)

• 90 Watts Max Each, 45 Watts RMS Each
• Water-repellent pressed paper Cone
• Dome tweeter
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 3-1/8"

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List price $460.00
-13% $399.98

In stock

Only 3 Left!

• 90 Watts Max Each, 45 Watts RMS Each
• Water-repellent pressed paper Cone
• Dome tweeter
• 4 Ohm Impedance
• Sensitivity: 93 dB
• Mounting Depth: 3-1/8"

Select Increments Versa-Pods (52308) with NSP4

Empty Pair 4" Universal Speaker Pods with Coaxial Car Speakers

SI-52308N big
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Empty Pair 4" Universal Speaker Pods with Coaxial Car Speakers

• Empty Single 4" Universal Speaker Pods
• Durable ABS plastic enclosure construction
• Versatile use for cars, motorcycles, and extreme terrain vehicles
• with 4" Coaxial Car Speakers

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26
List price $179.94
-8% $164.94

In stock.

• Empty Single 4" Universal Speaker Pods
• Durable ABS plastic enclosure construction
• Versatile use for cars, motorcycles, and extreme terrain vehicles
• with 4" Coaxial Car Speakers

Polk Audio 5.25" 300W Car/Marine ATV Speakers, Pair + 5.25" 225W Speakers, Pair

600W Peak (200W RMS) 5.25" DB+ Series 2-way Marine/UTV Certified Coaxial Speakers with IP55 Rating for Car, Powersports or Marine Audio Package

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600W Peak (200W RMS) 5.25" DB+ Series 2-way Marine/UTV Certified Coaxial Speakers with IP55 Rating for Car, Powersports or Marine Audio Package

• 300 Watts Max Each, 100 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 91dB
• Mounting Depth: 1.74"

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74
List price $229.98
-29% $163.54

In stock

• 300 Watts Max Each, 100 Watts RMS Each
• 0.75" shallow tweeter design
• Polypropylene UV tolerant cone
• 4 Ohm Impedance
• Sensitivity: 91dB
• Mounting Depth: 1.74"

JBL STAGE151F (2-Pairs, 4-Total)

600W Peak (120W) RMS 5.25" Stage Series 2-Way Coaxial Speakers (2-Pairs)

STAGE151F_2 big
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600W Peak (120W) RMS 5.25" Stage Series 2-Way Coaxial Speakers (2-Pairs)

• 30 watts Peak Each, 150 watts RMS Each
• Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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Fits your A4 Quattro
List price $159.98
-38% $99.98

In stock

• 30 watts Peak Each, 150 watts RMS Each
• Balanced Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

Lowest price in 30 days

NVX Complete N-Series Speaker Upgrade Kit for 1997-2006 Jeep Wrangler TJ

Pair of 4x6" & 6.5" NVX N-Series Speaker Upgrade Kit with Metra Speaker Adapters and Harnesses | Fits select 1997-2006 Wrangler and Wrangler Unlimited

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Pair of 4x6" & 6.5" NVX N-Series Speaker Upgrade Kit with Metra Speaker Adapters and Harnesses | Fits select 1997-2006 Wrangler and Wrangler Unlimited

  • NVX NSP46 300W Peak (100W RMS) 4x6" N-Series 2-Way Coaxial Car Speakers
  • NSP65 540W Peak (180W RMS) 6.5" N-Series 2-Way Coaxial Car Speakers
  • Metra 72-6512 Speaker Harness for Simplified Installation
  • 82-1011 Speaker Mounting Bracket and 4x6" Factory Location Adapter
  • Complete Speaker Upgrade Kit with All Necessary Wiring and Mounting Hardware
2+ offers available
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129
List price $226.95
-49% $116.16

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List price $226.95
-49% $116.16
$104.54 with coupon | Price details
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2026-07-27 11:08:20

  • NVX NSP46 300W Peak (100W RMS) 4x6" N-Series 2-Way Coaxial Car Speakers
  • NSP65 540W Peak (180W RMS) 6.5" N-Series 2-Way Coaxial Car Speakers
  • Metra 72-6512 Speaker Harness for Simplified Installation
  • 82-1011 Speaker Mounting Bracket and 4x6" Factory Location Adapter
  • Complete Speaker Upgrade Kit with All Necessary Wiring and Mounting Hardware
Lowest price in 30 days

NVX N-Series Complete Speaker Upgrade Kit for 2005-2007 Dodge Magnum

2 Pairs of 6x9" & Pair of 3.5" NVX N-Series Speaker Upgrade Kit with Metra Harnesses | Fits select 2005-2007 Magnum

05-07-dodge-magnum-spkg big
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2 Pairs of 6x9" & Pair of 3.5" NVX N-Series Speaker Upgrade Kit with Metra Harnesses | Fits select 2005-2007 Magnum

• Front and Rear NVX 6x9" Coaxial Speakers
• NVX 3.5" Coaxial Speakers
• Metra Speaker Harnesses
• Plug-n-play Installation

2+ offers available
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108
List price $314.94
-23% $240.99

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2026-07-27 11:08:20

• Front and Rear NVX 6x9" Coaxial Speakers
• NVX 3.5" Coaxial Speakers
• Metra Speaker Harnesses
• Plug-n-play Installation

NVX Front N-Series Speaker Upgrade Kit for 1995-2000 Chevy CK Pickup

Pair of 5.25" NVX N-Series Speaker Upgrade Kit with Metra Speaker Adapters and Harnesses | Fits select 1995-2000 vehicles from Chevrolet

95-00-chevy-ck-pickup-fspkg big
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Pair of 5.25" NVX N-Series Speaker Upgrade Kit with Metra Speaker Adapters and Harnesses | Fits select 1995-2000 vehicles from Chevrolet

  • NVX NSP525 240W Peak (160W RMS) 5.25 Inch N-Series 2-Way Coaxial Car Speakers
  • High-performance N-Series design for enhanced audio clarity
  • Metra 72-4568 Speaker Harness for seamless installation
  • 82-3002 5.25 Inch or 6.5 Inch Speaker Adapter Brackets
  • Complete bundle includes Coaxial Speakers, Harnesses, and Mounting Brackets
2+ offers available
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56
List price $101.97
-44% $57.49

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2026-07-27 11:08:20
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MTX Audio THUNDER51 (2-Pairs, 4-Total)

720W Peak (360W RMS) 5.25" Thunder Series 2-Way Component System (2-Pairs)

THUNDER51_2 big
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720W Peak (360W RMS) 5.25" Thunder Series 2-Way Component System (2-Pairs)

• Peak Power: 180W • RMS Power: 90W
• 1" Soft Dome Tweeter
• Mounting Depth: 2.19"
• Polypropylene Cone and Rubber Surround

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1
List price $479.90
-17% $399.92

In stock

Only 2 Left!

• Peak Power: 180W • RMS Power: 90W
• 1" Soft Dome Tweeter
• Mounting Depth: 2.19"
• Polypropylene Cone and Rubber Surround

2) Rockford Fosgate P1683 6x8" 130W 3 Way + 2) P1692 6x9" 150W 2 Way Speakers

260W Peak (130W RMS) 6" x 8" Punch Series 3-way Full Range Coaxial Speakers Package

P1692,P1683 big
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260W Peak (130W RMS) 6" x 8" Punch Series 3-way Full Range Coaxial Speakers Package

• Peak Power: 130W
• RMS Power: 65W
• Butyl rubber surround
• 1" PEI Dome tweeter
• Flexfit basket design
• OEM Adapter plate included
• Recessed tweeter mount uses standard 1-3/4" hole saw

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169
$219.98

In stock

• Peak Power: 130W
• RMS Power: 65W
• Butyl rubber surround
• 1" PEI Dome tweeter
• Flexfit basket design
• OEM Adapter plate included
• Recessed tweeter mount uses standard 1-3/4" hole saw

(2) Hifonics ZS653 6.5" 3-Way Speakers + (2) 4x6" Coaxial Speakers

(2) 600W 6.5" Zeus 3-Way + (2) 400W 4x6" Zeus 2-Way Coaxial Package

ZS46CX,ZS653 big
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(2) 600W 6.5" Zeus 3-Way + (2) 400W 4x6" Zeus 2-Way Coaxial Package

• 300 Watts Max Each, 50 Watts RMS Each
• 1" Neo-Mylar Soft Dome Tweeter
• Alpha-Cellulose mid-woofer cone material
• 4 Ohm Impedance
• Sensitivity: 88dB
• CEA-426B compliant speakers

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38
List price $59.98
-8% $54.96

In stock

• 300 Watts Max Each, 50 Watts RMS Each
• 1" Neo-Mylar Soft Dome Tweeter
• Alpha-Cellulose mid-woofer cone material
• 4 Ohm Impedance
• Sensitivity: 88dB
• CEA-426B compliant speakers

Limited time!

NVX N-Series Front Door Speaker Upgrade Kit

5.25" N-Series 2 Way Coaxial Car Speaker Upgrade Kit for 1999-2006 Chevrolet Silverado

NSP525_MET-823002_MET-724568 big
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5.25" N-Series 2 Way Coaxial Car Speaker Upgrade Kit for 1999-2006 Chevrolet Silverado

• Includes a pair of NVX VSP525 5.25" coaxial speakers
• Designed for select 1999-2006 Silverado 1500
• Speaker adapters and wiring harnesses included
• Plug-and-play installation

Purchase $400 or More of NVX and Save 15%!
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List price $101.97
-44% $57.49

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• Includes a pair of NVX VSP525 5.25" coaxial speakers
• Designed for select 1999-2006 Silverado 1500
• Speaker adapters and wiring harnesses included
• Plug-and-play installation

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    FAQ Frequently asked questions in Car Speakers


    There are two main types of car speakers: component speakers and coaxial speakers. Component speakers consist of separate tweeters, midranges, and woofers, which can be installed in different locations in your car for the best sound quality. Coaxial speakers combine all three speakers into one unit, which is typically mounted in the door panels.
    The most common mistakes people make when installing car speakers include:
    1. Not using the correct speaker adapters: If your car speakers do not fit the factory mounting locations, you will need to use speaker adapters.
    2. Not connecting the speaker wires correctly: The speaker wires must be connected to the speakers and the car stereo in the correct order.
    3. Not securing the speakers in place: The speakers must be secured in place to prevent them from rattling or vibrating.
    4. Not testing the speakers after installation: It is important to test the speakers after installation to make sure they are working properly.
    There are many benefits to installing car speakers, including:
    1. Improved sound quality: Car speakers can significantly improve the sound quality of your car stereo.
    2. Increased bass response: Car speakers can provide you with deeper bass, which can make your music sound more powerful.
    3. Better clarity: Car speakers can provide you with clearer sound, which can make it easier to understand lyrics and other audio content.
    4. Increased volume: Car speakers can provide you with more volume, which can be helpful if you like to listen to your music loud.
    5. Customization: Car speakers can be customized to your specific needs, such as the type of music you listen to or the size of your car.
    The cost of installing car speakers can vary depending on the type of speakers you choose, the complexity of the installation, and the location where you have the speakers installed. In general, you can expect to pay anywhere from $50 to $300 to have car speakers installed.
    There are a few factors to consider when choosing car speakers, including:
    1. The type of music you listen to: If you listen to a lot of bass-heavy music, you will need speakers with good bass response. If you listen to a lot of classical music, you will need speakers with good clarity.
    2. The size of your car: If you have a small car, you will need smaller speakers. If you have a large car, you can get away with larger speakers.
    3. Your budget: Car speakers can range in price from a few dollars to a few hundred dollars. It is important to set a budget before you start shopping.
    4. The installation process: If you are not comfortable installing car speakers yourself, you may want to hire a professional.

    All About

    Car Speakers

    Upgrading your car speakers is a tried and true method to improve your sound system. A set of aftermarket speakers is able to handle a wider range of frequencies, giving the lower notes greater depth and making the higher notes sound more defined. 

    Aftermarket products are built with more durable and temperature resistant materials than the OEM (originally equipment manufacturer). For example, most auto speakers include a rubber or foam surround for enhanced durability. 

    Sonic Electronix’s selection includes various sizes of full-range 2-way, 3-way and  component speakers.

    The most important figure when gauging a speaker's quality is sensitivity rating. A sensitivity or efficiency 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 given a set amount of input power. An efficient speaker helps you maximize your available power. 

    Selecting the Proper Speaker for Your Application

    In order to select the proper set of speakers for your sound system, look at the RMS (root mean square) power-handling rating. The RMS power is the amount of power the speaker requires to operate safely. It also refers to the amount of power a speaker can handle on a continuous basis. Sonic Electronix recommends giving speakers 75 - 90% of its recommended RMS rating to help prevent blowing your speakers.

    Full-range car speakers – which contain all elements in one for lows, mids and highs feature a woofer and tweeter both molded into the speaker. Some include midrange drivers. 

    In contrast, component systems feature separate woofers and tweeters. This allows you to mount the tweeters in an optimal location for generating a more realistic sound. They also have midranges and external crossovers, which send separate frequencies to the woofer and the tweeter for a more efficient reproduction.

    Whether you're a car audio novice or the biggest audiophile on the block, you should be able to find a pair of speakers from our wide selection that will help you build the system of your dreams.

    Car Speaker Resources:

     

    Looking for a way to improve your car audio experience? Car speakers are the key to an amazing audio experience! With the right speakers, you can create a custom sound system that will make your car feel like a concert hall.

    Car speakers are the transducers that convert electrical signals into sound waves. They are the most important part of any car audio system, and they come in a variety of sizes, shapes, and power ratings.

    Advantages of Car Speakers

    There are many advantages to installing car speakers in your vehicle. Here are just a few:

    Improved sound quality: Car speakers can improve the sound quality of your car stereo by providing clearer highs, richer mids, and deeper bass.

    Increased volume: Car speakers can increase the volume of your car stereo, so you can enjoy your music louder and more clearly.

    Customization: Car speakers can be customized to match your specific needs and preferences. You can choose speakers that are the right size for your vehicle, the right power rating for your listening habits, and the right sound signature for your taste in music.

    Sonic Electronix is here to help you find the best car speakers for your vehicle. We offer a wide selection of speakers from the top brands in the industry, and our staff is knowledgeable and experienced. We can help you choose the right speakers for your needs and budget, and we can also install them for you.

    If you're looking for the best car speakers, don't hesitate to contact Sonic Electronix. We're here to help you create the perfect sound system for your vehicle.

    why-shoping-with-sonic

    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
    Why Shop With Us?
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    2011 Ford Focus

    2023 Audi A3

    2004 Audi A4 Quattro

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    2019 Harley Davidson FLHT Electra Glide Standard

    2001 Harley Davidson FLHTC/I Electra Glide Classic

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    2013 Can-Am Commander E

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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.