All Car Speakers for your 1999 A4 Quattro

It’s a no-brainer.
Get your speakers here.

Install kit discounts · Guaranteed fit · Full warranty

	Sonic Electronix	Others
Guaranteed to Fit	✓	✕
Free/Discounted Speaker Adapters*	✓	✕
Free/Discounted Wiring Harness*	✓	✕
Authorized with Full Warranty	✓	✕

Trending Deals in All Car Speakers

All Deals

Free Speaker Accessories

Shop Speaker Installation

Your Vehicle

Fits select locations in your 1999 A4 Quattro

Add vehicle details to confirm exact location or Update vehicle.

Update vehicle | Remove vehicle | Vehicle store

Shop the Category

Clear all

FAQ Frequently asked questions in All Car Speakers

Car Speakers Frequently Asked Questions (FAQ)

What are coaxial car speakers, and how do they differ from component speakers?

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.

What is speaker sensitivity, and why is it important when choosing car speakers?

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.

What is speaker impedance, and how does it affect car audio systems?

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.

What are the advantages of upgrading factory car speakers with aftermarket ones?

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.

What is the difference between 2-way and 3-way car speakers, and which should I choose?

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.

Popular Brands in All Car Speakers

Shop all brands

Hide all brands

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

Free perks, no Prime^TM fees

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.

Free install gear for stereos

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.

Authentic & Authorized

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.

View best sellers, deals, and 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!

Learn about All Car Audio

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!

Call or email our experts

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?

Subscribe

Welcome to the Team!

All Car Speakers for your 1999 A4 Quattro

It’s a no-brainer. Get your speakers here.

Trending Deals in All Car Speakers

Your Vehicle

Add vehicle details to confirm exact location or Update vehicle.

Shop the Category

Kenwood KFC-1098RS

Kenwood KFC-1098RS

Hifonics ZS525CX

Hifonics ZS525CX

JL Audio C2-525

JL Audio C2-525

Infinity Kappa 503CF (INFSPKKA503CFAM)

Infinity Kappa 503CF (INFSPKKA503CFAM)

AudioControl PNW-525

AudioControl PNW-525

Cerwin-Vega XED525C

Cerwin-Vega XED525C

Hertz DCX 100.3

Hertz DCX 100.3

JL Audio C2-350x

JL Audio C2-350x

MB Quart DK2-110

MB Quart DK2-110

JL Audio C2-525x

JL Audio C2-525x

Cerwin-Vega XED42

Cerwin-Vega XED42

JBL Stage2 45F (STAGE245F)

JBL Stage2 45F (STAGE245F)

Hifonics ZS35CX

Hifonics ZS35CX

MTX Audio THUNDER52

MTX Audio THUNDER52

Pioneer TS-A1081F (Open Box, Great)

Pioneer TS-A1081F (Open Box, Great)

JL Audio C1-525x

JL Audio C1-525x

AudioControl A35C

AudioControl A35C

AudioControl PNW-35

AudioControl PNW-35

MB Quart DK2-108

MB Quart DK2-108

Cerwin-Vega V525

Cerwin-Vega V525

FAQ Frequently asked questions in All Car Speakers

Car Speakers Frequently Asked Questions (FAQ)

Popular Brands in All Car Speakers

Are you sure you want to clear your garage?

This category was not designed for products.

Didn't find your car?

Account

Shopping help

Company

Everyday heroes

Brand stores

Useful links

It’s a no-brainer.
Get your speakers here.