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2003 Audi A6

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Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

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

Universal-Fit Audio for 2003 Audi A6

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

Better sound with your factory radio

Better sound with a factory radio

Love your factory look or can't replace the stereo? We got you covered.

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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.
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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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Subwoofer Size
Refers to the diameter of the subwoofer, measured in inches.
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.
Top-Mount Depth (Mounting Depth)
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
Voice Coil(s)
Dual voice coil subs have more wiring flexibility than single voice coils subs; however, single voice coil subwoofers provide easier hookup options for wiring multiple subwoofers in parallel or series. You may also run a dual voice coil (DVC) sub in parallel, series, or combination. A quad voice coil has four voice coils and is equal to two dual voice coil subwoofers as far as wiring goes.
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.
Subwoofer Design
This is the design of the subwoofer or the opening of the subwoofer enclosure. Each design has it's own benefits, whether it is a square, circle, or oval.

Round/Circle: This is the typical and common subwoofer design. They have a round cone and are a circle in design.

Square: These woofers are able to achieve a greater cone area in a smaller space. Because of the greater surface area, some square subwoofers will be louder than a round subwoofer of the same size.

Minimum Sealed Box Volume
This value indicates the minimum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
Maximum Sealed Box Volume
This value indicates the maximum sealed box volume that the manufacturer recommends for the subwoofer. The volume is typically displayed in cubic feet.
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".
Main Cone Color
This is the color of the speaker's or subwoofer's cone.
Recommended Enclosure Type
This is the recommended type of enclosure that the subwoofer should be installed into. Some subwoofers are specially designed for particular enclosures.

Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.

Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".

Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.

Xmax (millimeters)
Typically measured in millimeters, the Xmax value is the measure of a speaker cone's maximum excursion in one direction while maintaining a linear behavior.
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Earthquake Sound TNT-12S

1250W Peak (400W RMS) 12" TNT Series Single 4-ohm Car Subwoofer

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Earthquake Sound TNT-12S

1250W Peak (400W RMS) 12" TNT Series Single 4-ohm Car Subwoofer

• 1250W Peak
• 400W RMS
• Polypropylene Cone Body
• High Roll Surround
• Spring Loaded Terminals
• Triple Voice Coil Vents

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DC Audio Level 1 12M4D2 (M4LV112D2)

600W Peak (300W RMS) 12" Level 1 Series M4 Version Dual 2-ohm Car Subwoofer

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DC Audio Level 1 12M4D2 (M4LV112D2)

600W Peak (300W RMS) 12" Level 1 Series M4 Version Dual 2-ohm Car Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Impedance: Dual 2 ohm
• Paper cone
• Stitched surround
• Mount depth: 6.5"
• Sensitivity: 86.9 dB

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NVX - Worth the Envy - Direct to Consumer Car Audio

American Bass HD 18" (HD-1811)

4000W Peak (2000W RMS) 18" HD Series Dual 1-ohm Subwoofer

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American Bass HD 18" (HD-1811)

4000W Peak (2000W RMS) 18" HD Series Dual 1-ohm Subwoofer

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Kevlar Fiber-Enforced Non-Pressed Paper Cone
• Oversized 1.4" 3-layer Foam Surround
• Mount depth: 16.85"
• Sensitivity: 90.5 dB

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Sundown Audio U-18 v.2 D4 18" (U18V2D4)

4000W Peak (2000W RMS) 18" U Series Dual 4-ohm Car Subwoofer (SW-UV218D4)

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Sundown Audio U-18 v.2 D4 18" (U18V2D4)

4000W Peak (2000W RMS) 18" U Series Dual 4-ohm Car Subwoofer (SW-UV218D4)

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Dual 4 ohm
• Pressed Paper Cone
• Double-Stitched Surround
• Mount depth: 10"
• Sensitivity: 88.87 dB

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Cerwin-Vega H8DV4

900W Peak (300W RMS) 8" HED Series 2025 Edition Dual 4-ohm Subwoofer

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Cerwin-Vega H8DV4

900W Peak (300W RMS) 8" HED Series 2025 Edition Dual 4-ohm Subwoofer

• Peak Power: 900 watts
• RMS Power: 300 watts
• Reinforced Polypropylene Cone
• Santoprene Rubber Surround

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-17% $109.99

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DC Audio Level 5 18M4D1.4 (M4LV518D1.4)

7000W Peak (3500W RMS) 18" Level 5 Series M4 Version Dual 1.4-ohm Car Subwoofer

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DC Audio Level 5 18M4D1.4 (M4LV518D1.4)

7000W Peak (3500W RMS) 18" Level 5 Series M4 Version Dual 1.4-ohm Car Subwoofer

• Peak Power: 7000 watts
• RMS Power: 3500 watts
• Impedance: Dual 1.4 ohm
• Kraft Pulp cone
• Wide Foam surround
• Mount depth: 12.75"

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List price $1539.99
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American Bass DX-104

600W Peak (300W RMS) 10" DX Series Single 4-ohm Subwoofer

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American Bass DX-104

600W Peak (300W RMS) 10" DX Series Single 4-ohm Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Impedance: Single 4 ohm
• Non-Pressed Paper Cone
• Oversized 3-layer Foam Surround
• Mount depth: 5.1"
• Sensitivity: 86.2 dB

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-29% $80.34

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American Bass XR 15" (XR-1544)

3000W Peak (1500W RMS) 12" XR Series Dual 4-ohm Car Subwoofer

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American Bass XR 15" (XR-1544)

3000W Peak (1500W RMS) 12" XR Series Dual 4-ohm Car Subwoofer

• Peak Power: 3000 watts
• RMS Power: 1500 watts
• Impedance: Dual 4 ohm
• Fiberglass-Reinforced Rubber cone
• Stitched Rubber surround
• Mount depth: 8"
• Sensitivity: 86 dB

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List price $500.74
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Earthquake Sound Subzero-10 (SZ-10)

1500W Peak 10" Subzero Series Dual 4-ohm Car Subwoofer

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Earthquake Sound Subzero-10 (SZ-10)

1500W Peak 10" Subzero Series Dual 4-ohm Car Subwoofer

• 1500W Peak
• 750W RMS
• Paper Pressed Woofer Cone
• Composite Foam Woofer Surround
• Turbine Cooled Transducer Technology
• PSP Terminal Block
• 3" Aluminum Voice Coil Former
• 82dB

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DC Audio Level 3 18M2D1 (M2LV318D1)

2000W Peak (1000W RMS) 18" Level 3 Series Dual 1-Ohm Car Subwoofer

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DC Audio Level 3 18M2D1 (M2LV318D1)

2000W Peak (1000W RMS) 18" Level 3 Series Dual 1-Ohm Car Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 1 ohm
• Non-Pressed Paper cone
• Multi-layered Polymer Foam surround
• Mount depth: 9.5"
• Sensitivity: 90.4 dB

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DC Audio Level 3 18M2D2 (M2LV318D2)

2000W Peak (1000W RMS) 18" Level 3 Series M2 Version Dual 2-Ohm Car Subwoofer

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DC Audio Level 3 18M2D2 (M2LV318D2)

2000W Peak (1000W RMS) 18" Level 3 Series M2 Version Dual 2-Ohm Car Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 2 ohm
• Non-Pressed Paper cone
• Multi-layered Polymer Foam surround
• Mount depth: 9.5"
• Sensitivity: 90.4 dB

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Hertz MG 15 BASS

8000W Peak (2000W RMS) 15" SPL Monster Series Dual 1-ohm Car Subwoofer

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Hertz MG 15 BASS

8000W Peak (2000W RMS) 15" SPL Monster Series Dual 1-ohm Car Subwoofer

• Peak Power: 8000 watts
• RMS Power: 2000 watts
• Impedance: Dual 1 ohm
• Water-repellent pressed paper cone
• High-density Foam surround
• Sensitivity: 94 dB

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Hertz SS 12 D2

2000W Peak (1000W RMS) 12" SPL Show Series Dual 2-ohm Car Subwoofer

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Hertz SS 12 D2

2000W Peak (1000W RMS) 12" SPL Show Series Dual 2-ohm Car Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 2 ohm
• Non-Pressed Paper cone
• Multi-layered Polymer Foam surround
• Mount depth: 7.24"

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MTX 5515-22

800W Peak (400W RMS) 15" 55 Series Dual 2-ohm Car Subwoofer

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MTX 5515-22

800W Peak (400W RMS) 15" 55 Series Dual 2-ohm Car Subwoofer

• Peak Power: 800 watts
• RMS Power: 400 watts
• Impedance: Dual 2 ohm
• Polypropylene Cone
• Rubber Surround
• Mount depth: 8"
• Sensitivity: 85.4 dB

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Hertz MP 250 D2.3

1200W Peak (600W RMS) 10" Mille Pro Series Dual 2-ohm Car Subwoofer

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Hertz MP 250 D2.3

1200W Peak (600W RMS) 10" Mille Pro Series Dual 2-ohm Car Subwoofer

• Peak Power: 1200 watts
• RMS Power: 600 watts
• Impedance: Dual 2 ohm
• Pressed Pulp Fiber cone
• Butyl Rubber surround
• Mount depth: 5.55"
• Sensitivity: 83.5 dB

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List price $575.00
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DC Audio Level 6 18M4D.7 (M4LV618D.7)

9000W Peak (4500W RMS) 18" Level 6 Series M4 Version Dual 0.7-ohm Car Subwoofer

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DC Audio Level 6 18M4D.7 (M4LV618D.7)

9000W Peak (4500W RMS) 18" Level 6 Series M4 Version Dual 0.7-ohm Car Subwoofer

• Peak Power: 9000 watts
• RMS Power: 4500 watts
• Impedance: Dual 0.7 ohm
• Kraft Pulp cone
• Wide Foam surround
• Mount depth: 13"

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List price $1814.99
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American Bass King 15" (KING-1522)

15000W Peak (6500W RMS) 15" KING Series Dual 2-ohm Subwoofer

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American Bass King 15" (KING-1522)

15000W Peak (6500W RMS) 15" KING Series Dual 2-ohm Subwoofer

• Peak Power: 15000 watts
• RMS Power: 6500 watts
• Impedance: Dual 2 ohm
• Carbon Fiber Cone
• Foam Surround
• Mount depth: 12.2"
• Sensitivity: 85.7 dB

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List price $2105.40
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American Bass SL 10" (SL-1044)

600W Peak (300W RMS) 10" SL Series Dual 4-ohm Shallow Subwoofer

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American Bass SL 10" (SL-1044)

600W Peak (300W RMS) 10" SL Series Dual 4-ohm Shallow Subwoofer

• Peak Power: 600 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Light and rigid Composite Paper Cone
• High Roll Foam high density Surround
• Mount depth: 3.62"
• Sensitivity: 86.7 dB

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List price $121.97
-29% $87.12

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• Peak Power: 600 watts
• RMS Power: 300 watts
• Impedance: Dual 4 ohm
• Light and rigid Composite Paper Cone
• High Roll Foam high density Surround
• Mount depth: 3.62"
• Sensitivity: 86.7 dB

Polk Audio MM1242 DVC (MM1242DVC)

1260W Peak (420W RMS) 12" MM1 Series Dual 4-ohm Marine Subwoofer

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Polk Audio MM1242 DVC (MM1242DVC)

1260W Peak (420W RMS) 12" MM1 Series Dual 4-ohm Marine Subwoofer

• Peak Power: 1260 watts
• RMS Power: 420 watts
• Impedance: Dual 4 ohm
• Composite Polypropylene Cone - CPPC
• Santoprene Rubber surround
• Mount depth: 4.64"
• Sensitivity: 87 dB

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Universal Icon Universal – fits most vehicles.

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Cerwin Vega SPCL152

2400W Peak (1200W RMS) 15" Stroker Pro Classic Series Single 2-ohm Subwoofer

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Cerwin Vega SPCL152

2400W Peak (1200W RMS) 15" Stroker Pro Classic Series Single 2-ohm Subwoofer

• Peak Power: 2400 watts
• RMS Power: 1200 watts
• Impedance: Single 2 ohm
• Treated Paper cone
• Treated Cloth surround
• Mount depth: 8.15"
• Sensitivity: 93.8 dB

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Universal Icon Universal – fits most vehicles.

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