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All Car Speakers for your 2001 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.
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DS18 6OCT300-8 (Sold Individually)

600W Peak (300W RMS) 6.5" Octagonal Series 8-ohm Mid-range Speaker

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DS18 6OCT300-8 (Sold Individually)

600W Peak (300W RMS) 6.5" Octagonal Series 8-ohm Mid-range Speaker

• 600 watts Peak Each, 300 watts RMS Each
• Paper cone material
• Impedance: 8 ohm
• Sensitivity: 95 dB

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$89.95

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NVX VSP65KIT - Like New (Open Box)

750W Peak (250W RMS) 6.5" V-Series 2-Way Component Speaker System with 25mm Silk Dome Tweeters

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NVX VSP65KIT - Like New (Open Box)

750W Peak (250W RMS) 6.5" V-Series 2-Way Component Speaker System with 25mm Silk Dome Tweeters

• 375 watts Peak Each, 125 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB
• Mounting Depth: 2.51"

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List price $131.99
-28% $94.99 /set

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NVX VSP65KIT - Open Box, Great

750W Peak (250W RMS) 6.5" V-Series 2-Way Component Speaker System with 25mm Silk Dome Tweeters

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NVX VSP65KIT - Open Box, Great

750W Peak (250W RMS) 6.5" V-Series 2-Way Component Speaker System with 25mm Silk Dome Tweeters

• 375 watts Peak Each, 125 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB
• Mounting Depth: 2.51"

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1
List price $131.99
-39% $79.99 /set

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NVX XSP652 (Open Box, Great)

600W Peak (200W RMS) 6.5" X-Series 2-Way Coaxial Speakers with Carbon Fiber Cones and 25mm Silk Dome Tweeters

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NVX XSP652 (Open Box, Great)

600W Peak (200W RMS) 6.5" X-Series 2-Way Coaxial Speakers with Carbon Fiber Cones and 25mm Silk Dome Tweeters

• 300 watts Max Each, 100 watts RMS Each
• 1" Silk Dome Tweeters
• Lightweight Carbon Fiber cone
• Impedance: 4 ohm
• Sensitivity: 92 dB
• Mounting Depth: 2.52"

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2
List price $143.99
-35% $93.73 /pair

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NVX VSPTW (Open Box, Great)

450W Peak (150W RMS) 1" V-Series Silk Dome Tweeters with External Crossovers

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NVX VSPTW (Open Box, Great)

450W Peak (150W RMS) 1" V-Series Silk Dome Tweeters with External Crossovers

• 1" V Series Dome Tweeters
• 225 watts Peak Each
• 75 watts RMS Each
• 4 ohm Impedance

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Install kits available for most vehicles

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Fits multiple locations in your A4 Quattro
  • Rear Door
  • Upper Front Door
List price $79.99
-56% $34.99 /pair

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Rockford Fosgate Prime R165X3 (Open Box, Great)

180W Peak (90W RMS) 6.5" Prime Series 3 Way 4-ohm Coaxial Car Speakers

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Rockford Fosgate Prime R165X3 (Open Box, Great)

180W Peak (90W RMS) 6.5" Prime Series 3 Way 4-ohm Coaxial Car Speakers

• 90 watts Peak Each, 45 watts RMS Each
• 1/2" Piezo pole-mounted Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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2
List price $99.99
-51% $48.99 /pair

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JBL Club 620F (SPKCB620FAM) (Open Box, Great)

330W Peak (110W RMS) 6.5" Club Series 2-way 3-ohm Shallow Mount Coaxial Car Speakers

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JBL Club 620F (SPKCB620FAM) (Open Box, Great)

330W Peak (110W RMS) 6.5" Club Series 2-way 3-ohm Shallow Mount Coaxial Car Speakers

• 165 watts Peak Each, 55 watts RMS Each
• 3/4" PEI (Polyetherimide) Balanced Dome tweeters
• UV-resistant Polypropylene cone material with Plus One woofer cone architecture
• Impedance: 3 ohm
• Sensitivity: 92 dB

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1
List price $129.95
-57% $55.97 /pair

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• 165 watts Peak Each, 55 watts RMS Each
• 3/4" PEI (Polyetherimide) Balanced Dome tweeters
• UV-resistant Polypropylene cone material with Plus One woofer cone architecture
• Impedance: 3 ohm
• Sensitivity: 92 dB

NVX VSPTW (Like New (Open Box))

450W Peak (150W RMS) 1" V-Series Silk Dome Tweeters with External Crossovers

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NVX VSPTW (Like New (Open Box))

450W Peak (150W RMS) 1" V-Series Silk Dome Tweeters with External Crossovers

• 1" V Series Dome Tweeters
• 225 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 multiple locations in your A4 Quattro
  • Rear Door
  • Upper Front Door
List price $79.99
-47% $42.49 /pair

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NVX XSP652 (Like New (Open Box))

600W Peak (200W RMS) 6.5" X-Series 2-Way Coaxial Speakers with Carbon Fiber Cones and 25mm Silk Dome Tweeters

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NVX XSP652 (Like New (Open Box))

600W Peak (200W RMS) 6.5" X-Series 2-Way Coaxial Speakers with Carbon Fiber Cones and 25mm Silk Dome Tweeters

• 300 watts Max Each, 100 watts RMS Each
• 1" Silk Dome Tweeters
• Lightweight Carbon Fiber cone
• Impedance: 4 ohm
• Sensitivity: 92 dB
• Mounting Depth: 2.52"

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Install kits available for most vehicles

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List price $143.99
-29% $101.99 /pair

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Rockford Fosgate Prime R165X3 (Open Box, Good)

180W Peak (90W RMS) 6.5" Prime Series 3 Way 4-ohm Coaxial Car Speakers

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Rockford Fosgate Prime R165X3 (Open Box, Good)

180W Peak (90W RMS) 6.5" Prime Series 3 Way 4-ohm Coaxial Car Speakers

• 90 watts Peak Each, 45 watts RMS Each
• 1/2" Piezo pole-mounted Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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Install kits available for most vehicles

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List price $99.99
-50% $49.99 /pair

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• 90 watts Peak Each, 45 watts RMS Each
• 1/2" Piezo pole-mounted Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

DS18 PRO-X6.4BM (Sold Individually) (Open Box, Great)

500W Peak (250W RMS) 6.5” PRO-X Series 4-ohm Mid-Range Loudspeaker

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DS18 PRO-X6.4BM (Sold Individually) (Open Box, Great)

500W Peak (250W RMS) 6.5” PRO-X Series 4-ohm Mid-Range Loudspeaker

• 500 watts Peak Each, 250 watts RMS Each
• Red Aluminum Bullet tweeters
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

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List price $52.95
-30% $37.07

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• 500 watts Peak Each, 250 watts RMS Each
• Red Aluminum Bullet tweeters
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

Massive Audio M6XL (Sold Individually) (Open Box, Great)

400W Peak (200W RMS) 6.5" Pro-Audio Midrange 8-ohm Speaker

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Massive Audio M6XL (Sold Individually) (Open Box, Great)

400W Peak (200W RMS) 6.5" Pro-Audio Midrange 8-ohm Speaker

• 400 watts Peak Each, 200 watts RMS Each
• Hardened Paper cone material
• Impedance: 8 ohm
• Sensitivity: 97 dB

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List price $74.99
-44% $41.99

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NVX VSP65 - Open Box, Great

600W Peak (200W RMS) 6.5" V-Series 2-Way Coaxial Speakers with 25mm Silk Dome Tweeters

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NVX VSP65 - Open Box, Great

600W Peak (200W RMS) 6.5" V-Series 2-Way Coaxial Speakers with 25mm Silk Dome Tweeters

• 300 watts Peak Each, 100 watts RMS Each
• 1" Silk Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB
• Mounting Depth: 2.51"

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Install kits available for most vehicles

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1
List price $107.99
-42% $62.99 /pair

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Lowest price in 30 days

Infinity Kappa 603CF (INFSPKKA603CFAM) - Open Box, Great

Kappa Series 6.5" Component Speaker System

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Infinity Kappa 603CF (INFSPKKA603CFAM) - Open Box, Great

Kappa Series 6.5" Component Speaker System

• Peak Power: 330W
• RMS Power: 110W
• edge-driven, silk dome tweeter
• Mounting Depth: 2-1/8"
• Plus One+ glass-fiber woofer cone

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Install kits available for most vehicles

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6
List price $499.95
-39% $305.96

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JL Audio C1-650x (Open Box, Great)

150W Peak (100W RMS) 6.5" Evolution C1 Series 2-way 4-ohm Coaxial Car Speakers

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JL Audio C1-650x (Open Box, Great)

150W Peak (100W RMS) 6.5" Evolution C1 Series 2-way 4-ohm Coaxial Car Speakers

• 75 watts Peak Each, 50 watts RMS Each
• 3/4" Silk-suspended Aluminum Dome ferrofluid-cooled tweeters with neodymium magnets
• Mineral-Filled Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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Install kits available for most vehicles

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42
List price $129.99
-15% $110.49 /pair

In stock

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JL Audio C1-100ct (Open Box, Great)

120W RMS 1" C1 Series Silk-suspended Aluminum Dome Component Car Tweeters

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JL Audio C1-100ct (Open Box, Great)

120W RMS 1" C1 Series Silk-suspended Aluminum Dome Component Car Tweeters

• 1" C1 Series Silk-suspended Aluminum Dome Tweeters
• 60 watts RMS Each
• 4 ohm Impedance

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Install kits available for most vehicles

found car based on your search
Fits multiple locations in your A4 Quattro
  • Rear Door
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9
List price $84.99
-15% $72.24 /pair

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JL Audio C2650 - Open Box, Great

450W 6.5" 2-Way Evolution C2 Series Component Car Speakers System

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JL Audio C2650 - Open Box, Great

450W 6.5" 2-Way Evolution C2 Series Component Car Speakers System

• Peak Power: 225 watts per channel
• RMS Power: 60 watts per channel
• 0.75" Silk Dome Tweeter
• Injection Molded, Mica-filled Polypropylene Cone
• 3-Position Adjustable Tweeter Level
• 4 Ohm Impedance
• Sensitivity: 91.0 dB @ 1 watt / 1 meter

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Install kits available for most vehicles

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21
List price $329.99
-25% $247.49 /set

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JL Audio C1-075ct (Open Box, Great)

100W RMS 3/4" C1 Series Silk-suspended Aluminum Dome Component Car Tweeters

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JL Audio C1-075ct (Open Box, Great)

100W RMS 3/4" C1 Series Silk-suspended Aluminum Dome Component Car Tweeters

• 3/4" C1 Series Silk-suspended Aluminum Dome Tweeters
• 50 watts RMS Each
• 6 ohm Impedance

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Install kits available for most vehicles

found car based on your search
Fits multiple locations in your A4 Quattro
  • Rear Door
  • Upper Front Door
5
List price $74.99
-15% $63.74 /pair

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JL Audio C2-650 (Open Box, Great)

200W RMS 6.5" Evolution C2 Series 2-way 4-ohm Component Speaker System

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JL Audio C2-650 (Open Box, Great)

200W RMS 6.5" Evolution C2 Series 2-way 4-ohm Component Speaker System

• 100 watts RMS Each
• 3/4" Silk Dome tweeters
• Mica Injected Polypropylene - MIPP cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

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21
List price $329.99
-15% $280.49 /set

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Rockford Fosgate T1650-S (Open Box, Great)

320W Peak (160W RMS) 6.5" Power Series 2-way 4-ohm Euro-Fit Component Speaker System

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Rockford Fosgate T1650-S (Open Box, Great)

320W Peak (160W RMS) 6.5" Power Series 2-way 4-ohm Euro-Fit Component Speaker System

• 160 watts Peak Each, 80 watts RMS Each
• 1" Treated Fabric Dome Tweeters
• Carbon Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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List price $379.99
-15% $322.99

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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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    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
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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.

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