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All Car Speakers for your 2004 A4 Quattro close

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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.
Machete Series (10)
PRO-X Series (10)
Punch Series (7)
Reference Series (7)
V Series (7)
HED Series (5)
C1 Series (4)
C2 Series (4)
CS Series (4)
Excelon Motorsports Series (4)
Kappa Series (4)
MSNEO Series (4)
Prime Series (4)
PRO Series (4)
S Series (4)
SPL Show Series (4)
VEX Series (4)
XL Series (4)
ZXI Series (4)
Apocalypse Series (3)
EQ Series (3)
NEO Series (3)
PANCADÃO Series (3)
Primus Series (3)
PRO-GM Series (3)
Stage Series (3)
VEGA Series (3)
A Series (2)
C3 Series (2)
Cento Series (2)
CF Series (2)
Club Series (2)
Dieci Series (2)
DMD Series (2)
DMDX Series (2)
EXL Series (2)
Focus Series (2)
G-Series (TSG) (2)
Godfather Series (2)
Hannibal Series (2)
KS Series (2)
LCMR Series (2)
M Series (2)
MC Series (2)
Mille Legend Series (2)
MotorSport Series (2)
MR Series (2)
N-Series (2)
Polk DB+ Series (2)
Power Series (2)
Power T1 Series (2)
Power T2 Series (2)
Prime Series (2)
PRO-FR Series (2)
PRO-NS Series (2)
Punch Pro Series (2)
SA Series (2)
SQ Series (2)
Street Series (2)
Terminator Series (2)
Thunder Series (2)
VTEK Series (2)
XED Series (2)
BASSREV Series (1)
Black Hydra Series (1)
Colossus Classic Series (1)
CVPRO Series (1)
CVPX Series (1)
Diamond Elite Series (1)
Discus Series (1)
DR Series (1)
DS Series (1)
E-Series (1)
ECX Series (1)
EPIC PRO Series (1)
EQ NEO Series (1)
eXcelon Series (1)
Formula Series (1)
Gen-X (1)
Godfather Pro Series (1)
GT7 Series (1)
Hawk Series (1)
HED Pro Series (1)
KFC Series (1)
MA Series (1)
Mille Pro Series (1)
MM Series (1)
MSPRO Series (1)
NEO SPL Series (1)
Octagonal Series (1)
PNW Series (1)
PNX Series (1)
Polk Audio MM1 Series (1)
Premium Series (1)
Pro Audio on Wheels Series (1)
Pro Audio Series (1)
PRO-HY Series (1)
Punch P1 Series (1)
Road Thunder Extreme Series (1)
RS Series (1)
Signature Series (1)
Sport Series (1)
Stadium (1)
Stadium Series (1)
Stage 3 Gen 2 Series (1)
Stallion Series (1)
Street Reference Pro (1)
Stroker Pro Series (1)
Stroker Series (1)
Studio Series (1)
Symphony Series (1)
Tsunami Series (1)
Uno Series (1)
Zeus Series (1)
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Massive Audio MA8 (Sold Individually)

350W Peak (150W RMS) 8" MA Series 8-ohm Pro-Audio Midrange Car Speaker

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Massive Audio MA8 (Sold Individually)

350W Peak (150W RMS) 8" MA Series 8-ohm Pro-Audio Midrange Car Speaker

• 350 watts Peak Each, 150 watts RMS Each
• Hardened Paper cone material
• Impedance: 8 ohm
• Sensitivity: 96 dB

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List price $62.49
-28% $44.99

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American Bass GFPRO-8-MB (Sold Individually)

500W Peak (250W RMS) 8" Godfather Pro Series Midbass 4-ohm Speaker

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American Bass GFPRO-8-MB (Sold Individually)

500W Peak (250W RMS) 8" Godfather Pro Series Midbass 4-ohm Speaker

• 500 watts Peak Each, 250 watts RMS Each
• Kevlar Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 97 dB

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List price $124.08
-29% $88.70

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Hertz SX 200 NEO

520W Peak (260W RMS) 8" NEO SPL Series 2-way 4-ohms Coaxial Car Speakers

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Hertz SX 200 NEO

520W Peak (260W RMS) 8" NEO SPL Series 2-way 4-ohms Coaxial Car Speakers

• 260 watts Peak Each, 130 watts RMS Each
• 1-3/4" PEI (Polyetherimide) Dome tweeters
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 99.5 dB

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List price $705.00
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DS18 G5.25Xi

270W Peak (90W RMS) 5.25" GEN-X Series 2-way 4-ohm Coaxial Speakers

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DS18 G5.25Xi

270W Peak (90W RMS) 5.25" GEN-X Series 2-way 4-ohm Coaxial Speakers

• 135 watts Peak Each, 45 watts RMS Each
• 1" Mylar Balanced Dome tweeters with neodynium magnets
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 84 dB

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$50.95 /pair

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DS18 8XL800-8 (Sold Individually)

800W Peak (400W RMS) 8" XL Series 8-ohm Mid-range Speaker

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DS18 8XL800-8 (Sold Individually)

800W Peak (400W RMS) 8" XL Series 8-ohm Mid-range Speaker

• 800 watts Peak Each, 400 watts RMS Each
• Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 99 dB

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DS18 8XL800N-4 (Sold Individually)

800W Peak (400W RMS) 8" XL Series Midrange 4-ohm Loudspeaker

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DS18 8XL800N-4 (Sold Individually)

800W Peak (400W RMS) 8" XL Series Midrange 4-ohm Loudspeaker

• 800 watts Peak, 400 watts RMS
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 100.7 dB

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DS18 8XL800-4 (Sold Individually)

800W Peak (400W RMS) 8" XL Series Midrange 4-ohm Loudspeaker

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DS18 8XL800-4 (Sold Individually)

800W Peak (400W RMS) 8" XL Series Midrange 4-ohm Loudspeaker

• 800 watts Peak, 400 watts RMS
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 99 dB

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List price $187.99
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Massive Audio M8S (Sold Individually)

300W Peak (140W RMS) 8” M Series 4-ohm Shallow Midrange Car Speaker

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Massive Audio M8S (Sold Individually)

300W Peak (140W RMS) 8” M Series 4-ohm Shallow Midrange Car Speaker

• 300 watts Peak Each, 140 watts RMS Each
• Laminate-Treated Paper cone material
• Impedance: 4 ohm
• Sensitivity: 98 dB
• Ultra shallow mounting depth

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List price $99.99
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Deaf Bonce Apocalypse AP-M80SQL

600W Peak (300W RMS) 8" Apocalypse Series Midrange 4-ohm Speakers

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Deaf Bonce Apocalypse AP-M80SQL

600W Peak (300W RMS) 8" Apocalypse Series Midrange 4-ohm Speakers

• 300 watts Peak Each, 150 watts RMS Each
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 95.3 dB

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$124.90 /pair

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Infinity Primus PR5012IS (PR5012ISAM)

240W Peak (80W RMS) 5.25" Primus Series 2 Way Coaxial 2.7-ohm Speakers

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Infinity Primus PR5012IS (PR5012ISAM)

240W Peak (80W RMS) 5.25" Primus Series 2 Way Coaxial 2.7-ohm Speakers

• 120 watts Peak Each, 40 watts RMS Each
• Textile Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 2.7 ohm
• Sensitivity: 88 dB

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List price $119.95
-54% $54.95 /pair

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DS18 3D160NO-4

320W Peak (160W RMS) 3" Midrange 4-ohm OEM Dashboard Loudspeakers

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DS18 3D160NO-4

320W Peak (160W RMS) 3" Midrange 4-ohm OEM Dashboard Loudspeakers

• 160 watts Peak Each, 80 watts RMS Each
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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  • Dash Corner
List price $143.99
-17% $119.95 /pair

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Limited time!

Earthquake Sound F5.25

600W Peak 5.25" Focus Series 2-Way Coaxial 4-ohm Car Speakers

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Earthquake Sound F5.25

600W Peak 5.25" Focus Series 2-Way Coaxial 4-ohm Car Speakers

• 300 watts Peak Each
• 3/4" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 87 dB

Free Speaker Accessory at Checkout!
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List price $120.00
-10% $107.99 /pair

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Limited time!

Earthquake Sound VTEK-MC5

1000W RMS 5.25" VTEK Series 2-Way Component 4-ohm Car Speaker System

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Earthquake Sound VTEK-MC5

1000W RMS 5.25" VTEK Series 2-Way Component 4-ohm Car Speaker System

• 500 watts RMS Each
• 1" Silk Dome Tweeters
• Electroplated Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

Free Speaker Accessory at Checkout!
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List price $249.00
-8% $229.99 /set

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DS18 PRO-X8BM (Sold Individually)

500W Peak (275W RMS) 8” PRO-X Series 8-ohm Mid-Range Bullet Loudspeaker

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DS18 PRO-X8BM (Sold Individually)

500W Peak (275W RMS) 8” PRO-X Series 8-ohm Mid-Range Bullet Loudspeaker

• 550 watts Peak Each, 275 watts RMS Each
• Red tweeter
• Non-Pressed Paper cone material
• Impedance: 8 ohm
• Sensitivity: 96 dB

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$70.95

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American Bass HAWK-8-MR (Sold Individually)

600W Peak (300W RMS) 8" Hawk Series Midrange 4-ohm Speaker with LED

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American Bass HAWK-8-MR (Sold Individually)

600W Peak (300W RMS) 8" Hawk Series Midrange 4-ohm Speaker with LED

• 600 watts Peak Power
• RMS Power: 300 watts
• Treated Paper cone material
• Impedance: 4 ohm
• Sensitivity: 97 dB
• Red LED lights

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List price $73.38
-24% $55.89

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DS18 PRO-CUPOLA3 (Sold Individually)

400W Peak (150W RMS) 5.25" Pro Audio Soft Dome Midrange 4-ohm Loudspeaker

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DS18 PRO-CUPOLA3 (Sold Individually)

400W Peak (150W RMS) 5.25" Pro Audio Soft Dome Midrange 4-ohm Loudspeaker

• 400 watts Peak, 150 watts RMS
• Coated non-resonant soft dome material
• Ultra-high sound quality
• Perfect for studio monitors or Hi-Fi applications
• Impedance: 4 ohm
• Sensitivity: 96 dB

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List price $239.99
-17% $199.95

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DS18 8PRO400MR-4 (Sold Individually)

400W Peak (200W RMS) 8" Pro Midrange 4-ohm Speaker

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DS18 8PRO400MR-4 (Sold Individually)

400W Peak (200W RMS) 8" Pro Midrange 4-ohm Speaker

• 400 watts Peak, 200 watts RMS
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 104 dB

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List price $86.99
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American Bass STALLION 8 NEO (Sold Individually)

1600W Peak (800W RMS) 8" Stallion Series 4-ohm Midrange Speaker

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American Bass STALLION 8 NEO (Sold Individually)

1600W Peak (800W RMS) 8" Stallion Series 4-ohm Midrange Speaker

• 800 watts Peak Each, 400 watts RMS Each
• Impedance: 4 ohm
• Sensitivity: 99.5 dB

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List price $209.88
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Sundown Audio LCMR-8 (LCMR84)

100W RMS 8" LCMR Series Pro Audio Midrange 4-ohm Speaker (S-LCMR84)

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Sundown Audio LCMR-8 (LCMR84)

100W RMS 8" LCMR Series Pro Audio Midrange 4-ohm Speaker (S-LCMR84)

• 100 watts RMS Each
• Impedance: 4 ohm
• Sensitivity: 94 dB

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List price $83.99
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DS18 PRO-1KP8.4 (Sold Individually)

2000W Peak (1000W RMS) 8" Pancadao Series Pro Mid-Bass 4-ohm Loudspeaker

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DS18 PRO-1KP8.4 (Sold Individually)

2000W Peak (1000W RMS) 8" Pancadao Series Pro Mid-Bass 4-ohm Loudspeaker

• 2000 watts Peak, 1000 watts RMS
• Paper cone material
• Impedance: 4 ohm
• Sensitivity: 96 dB

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    FAQ Frequently asked questions in All Car Speakers

    Car Speakers Frequently Asked Questions (FAQ)
    Coaxial car speakers, also known as full-range speakers, combine multiple speaker elements in one unit. These elements typically include a woofer for low frequencies and a tweeter for high frequencies. Some coaxial speakers may also have a mid-range driver for enhanced sound quality. The key advantage of coaxial speakers is their simplicity and ease of installation, as all components are housed in a single unit, making them a popular choice for stock speaker replacements. In contrast, component speakers consist of separate speaker elements—woofers, tweeters, and sometimes mid-range drivers—allowing for greater customization and sound quality. Component systems offer better sound separation and imaging, making them a preferred choice for audiophiles and those seeking high-quality audio in their vehicles.
    Speaker sensitivity, measured in decibels (dB), indicates how efficiently a speaker converts power into sound. Higher sensitivity speakers produce more sound with less power, making them suitable for low-powered factory stereos or aftermarket head units. Lower sensitivity speakers may require more power to achieve the same volume level. When choosing car speakers, it's essential to consider sensitivity to match your stereo's power output. If you have a low-powered system, opt for high-sensitivity speakers to maximize sound output without distortion. Conversely, higher-powered aftermarket amplifiers can work well with lower sensitivity speakers. Balancing speaker sensitivity with your system's power output is crucial to achieving optimal audio quality and avoiding distortion.
    Speaker impedance, measured in ohms (Ω), represents the electrical resistance a speaker presents to an amplifier. Car speakers typically come in 4-ohm and 8-ohm versions, with 4-ohm being the most common. The speaker's impedance affects the amount of power it draws from the amplifier. In car audio systems, it's essential to match the speaker's impedance with the amplifier's minimum recommended load. Amplifiers are designed to work most efficiently within specific impedance ranges, and a mismatch can result in reduced power output and potential damage to the amplifier or speakers. Most car audio amplifiers are optimized for 4-ohm speakers, so choosing 4-ohm speakers is generally a safe choice. However, if you're connecting multiple speakers, it's crucial to calculate the total impedance to avoid overloading the amplifier.
    Upgrading factory car speakers with aftermarket speakers offers several advantages: Improved Sound Quality: Aftermarket speakers often feature better materials, construction, and design, resulting in clearer, more detailed sound. Enhanced Bass: Upgraded speakers typically provide deeper and more pronounced bass response. Greater Power Handling: Aftermarket speakers can handle more power, reducing the risk of distortion at higher volumes. Customization: Aftermarket speakers offer a wide range of sizes, styles, and features, allowing you to tailor your sound system to your preferences. Durability: Many aftermarket speakers are built to withstand the harsh conditions of automotive use, increasing their longevity. Overall, upgrading car speakers can transform your in-car audio experience, delivering higher fidelity and more enjoyable sound.
    2-way and 3-way car speakers differ in the number of driver elements they incorporate. A 2-way speaker consists of a woofer for low frequencies and a tweeter for high frequencies, while a 3-way speaker adds a mid-range driver for improved sound separation. The choice between 2-way and 3-way speakers depends on your audio priorities and budget. 2-way speakers are cost-effective and suitable for most users, providing good sound quality and clarity. They are ideal for replacing factory speakers or upgrading basic audio systems. 3-way speakers offer enhanced sound separation and improved mid-range performance. If you seek more detailed and balanced audio with better instrument and vocal reproduction, 3-way speakers are a worthy upgrade. However, they tend to be pricier than 2-way speakers. Ultimately, your choice should align with your audio preferences and budget, as both 2-way and 3-way speakers can significantly enhance your car's audio system compared to factory-installed speakers.
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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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