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2003 Audi A4

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.

Universal-Fit Audio for 2003 Audi A4

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.

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Rockford Fosgate Punch GS-65

Surface Mount Mesh Grilles for Rockford Fosgate 6.5" Punch V2 Speakers

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Surface Mount Mesh Grilles for Rockford Fosgate 6.5" Punch V2 Speakers

• 6.5" Punch V2 Surface Mount Speaker Mesh Grilles
• Designed for use in select Rockford Fosgate Punch V2 speakers
• Surface mount design installs directly onto mounting surface
• Ideal for applications that disregard grille height

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$69.99

Available

Ships in 10-14 days

• 6.5" Punch V2 Surface Mount Speaker Mesh Grilles
• Designed for use in select Rockford Fosgate Punch V2 speakers
• Surface mount design installs directly onto mounting surface
• Ideal for applications that disregard grille height

Rockford Fosgate Power T1 T1S2-10S

1000W Peak (500W RMS) 10" T1 Slim Series Single 2-ohm Shallow Subwoofer for Sealed Enclosures

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1000W Peak (500W RMS) 10" T1 Slim Series Single 2-ohm Shallow Subwoofer for Sealed Enclosures

• Peak Power: 1000 watts
• RMS Power: 500 watts
• Impedance: Single 2 ohm
• Optimized for sealed enclosures
• Carbon Fiber/PMI/Glass Fiber Cone
• Synthetic organic polymer Surround
• Mount depth: 3.01"
• Sensitivity: 82 dB

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List price $647.99
-17% $539.99

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Rockford Fosgate Prime R2 R2D4-12

500W Peak (250W RMS) 12" Prime Series 2 Dual 4-ohm Car Subwoofer

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500W Peak (250W RMS) 12" Prime Series 2 Dual 4-ohm Car Subwoofer

• Peak Power: 500 watts
• RMS Power: 250 watts
• Impedance: Dual 4 ohm
• Mica Injected Polypropylene - MIPP Cone
• Poly-Foam Surround
• Mount depth: 5.067"
• Sensitivity: 89 dB

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$119.99

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Rockford Fosgate Power T2 T2S1-13

4000W Peak (2000W RMS) 13" Power Series Single 1-ohm Car Subwoofer

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4000W Peak (2000W RMS) 13" Power Series Single 1-ohm Car Subwoofer

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Triple 1 ohm
• Glass Fiber Cone
• Injection molded foam Surround
• Mount depth: 9.7"
• Sensitivity: 90 dB

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Rockford Fosgate Punch Marine PM500X2

500W RMS Class AB Punch Series 2 Channel Marine Amplifier

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500W RMS Class AB Punch Series 2 Channel Marine Amplifier

• 150 watts x 2 channel @ 4 ohm
• 250 watts x 2 channel @ 2 ohm
• Bridged: 500 watts x 1 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class A/B 2 ohm Stable 2-Channel Amplifier

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$549.99

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Rockford Fosgate Prime R2S-1X12 (Open Box, Great)

500W Peak (250W RMS) Loaded Single 12" Sealed Shallow Truck Enclosure

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500W Peak (250W RMS) Loaded Single 12" Sealed Shallow Truck Enclosure

• Sealed truck enclosure with 1 12" Prime R2 Series Subwoofer
• 250 watts RMS (500 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 27.375" L x 13.5" H x 3.25" W x 5.25" W2

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List price $259.99
-30% $181.99

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• Sealed truck enclosure with 1 12" Prime R2 Series Subwoofer
• 250 watts RMS (500 watts Peak)
• Final Impedance: 2-ohm
• Dimensions: 27.375" L x 13.5" H x 3.25" W x 5.25" W2

Rockford Fosgate P1G-12

Mesh Grille for Rockford Fosgate 12" Punch P1 Subwoofers

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Mesh Grille for Rockford Fosgate 12" Punch P1 Subwoofers

• Rockford Fosgate 12" Aluminum Subwoofer Grille
• For Select Rockford Fosgate Punch Gen 3 P1 Series Subs
• Cast Aluminum Ring
• Mesh Screen

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• Rockford Fosgate 12" Aluminum Subwoofer Grille
• For Select Rockford Fosgate Punch Gen 3 P1 Series Subs
• Cast Aluminum Ring
• Mesh Screen

Rockford Fosgate Prime R2 R2-300X4

300W RMS Class D Prime Series 4 Channel Car Amplifier

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300W RMS Class D Prime Series 4 Channel Car Amplifier

• 50 watts x 4 channel @ 4 ohm
• 75 watts x 4 channel @ 2 ohm
• Bridged: 150 watts x 2 channel @ 4 ohm
• Total RMS Power: 300 watts
• Class D 2 ohm Stable 4-Channel Amplifier

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Available Offers (2) for Rockford Fosgate Prime R2 R2-300X4
FREE Belva Amp Kit at Checkout!
Save 30% off an NVX XKIT44 Amp Kit at Checkout! Add a qualifying amplifier to your cart and save 30% on the NVX XKIT44 Amp Kit! No code needed — discount applies automatically at checkout.
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Rockford Fosgate Punch P500X2

500W RMS Class AB Punch Series 2 Channel Car Amplifier

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500W RMS Class AB Punch Series 2 Channel Car Amplifier

• 150 watts x 2 channel @ 4 ohm
• 250 watts x 2 channel @ 2 ohm
• Bridged: 500 watts x 1 channel @ 4 ohm
• Total RMS Power: 500 watts
• Class A/B 2 ohm Stable 2-Channel Amplifier

FREE Belva Amp Kit at Checkout!
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-9% $389.99

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Rockford Fosgate Punch Marine PM1000X5

1000W RMS Class AB/BD Punch Series 5 Channel Marine Amplifier

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1000W RMS Class AB/BD Punch Series 5 Channel Marine Amplifier

• 75 watts x 4 channel + 150 watts x 1 channel @ 4 ohm
• 125 watts x 4 channel + 300 watts x 1 channel @ 2 ohm
• 700 watts x 1 channel @ 1 ohm (subwoofer output)
• Bridged: @ 4 ohm
• Total RMS Power: 1000 watts
• Class AB / BD 2 ohm Stable 5-Channel Amplifier

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• 75 watts x 4 channel + 150 watts x 1 channel @ 4 ohm
• 125 watts x 4 channel + 300 watts x 1 channel @ 2 ohm
• 700 watts x 1 channel @ 1 ohm (subwoofer output)
• Bridged: @ 4 ohm
• Total RMS Power: 1000 watts
• Class AB / BD 2 ohm Stable 5-Channel Amplifier

Rockford Fosgate Punch GF-65

Flush Mount Mesh Grilles for Rockford Fosgate 6.5" Punch V2 Speakers

GF-65 big
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Flush Mount Mesh Grilles for Rockford Fosgate 6.5" Punch V2 Speakers

• 6.5" Punch V2 Flush Mount Speaker Mesh Grilles
• Designed for use in select Rockford Fosgate Punch V2 speakers
• Flush mount design for a seamless appearance
• Ideal for mounting low-profile speakers with shallow grilles

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$69.99

Available

Ships in 10-14 days

• 6.5" Punch V2 Flush Mount Speaker Mesh Grilles
• Designed for use in select Rockford Fosgate Punch V2 speakers
• Flush mount design for a seamless appearance
• Ideal for mounting low-profile speakers with shallow grilles

Limited time!

Rockford Fosgate M5-800X4

400W RMS M5-Series Class-AD 4-channel Marine Amplifier

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400W RMS M5-Series Class-AD 4-channel Marine Amplifier

• 100 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class AD 2 ohm Stable 4-Channel Amplifier

FREE NVX Amp Kit at Checkout!
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$689.99

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• 100 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class AD 2 ohm Stable 4-Channel Amplifier

Rockford Fosgate Prime R500X1D 500W RMS Mono Class D Amplifier + Amp Kit + Cap

500W RMS Prime Series Class D Monoblock Amplifier Package

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500W RMS Prime Series Class D Monoblock Amplifier Package

• RMS: 300W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Total RMS Power: 500W
• CEA-2006 Compliant
• Remote PLC (Punch Level Control) Included
• Efficient Class-D circuit topology
• Dimensions: 8-1/2"L x 6-3/4"W x 2"H

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List price $459.97
-15% $389.99

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• RMS: 300W x 1 @ 4 ohm, 500W x 1 @ 2 ohm
• Total RMS Power: 500W
• CEA-2006 Compliant
• Remote PLC (Punch Level Control) Included
• Efficient Class-D circuit topology
• Dimensions: 8-1/2"L x 6-3/4"W x 2"H

Rockford Fosgate Punch GF-8

Flush Mount Mesh Grilles for Rockford Fosgate 8" Punch V2 Speakers

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Flush Mount Mesh Grilles for Rockford Fosgate 8" Punch V2 Speakers

• 8" Punch V2 Flush Mount Speaker Mesh Grilles
• Designed for use in select Rockford Fosgate Punch V2 speakers
• Flush mount design for a seamless appearance
• Ideal for mounting low-profile speakers with shallow grilles

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$69.99

Available

Ships in 10-14 days

• 8" Punch V2 Flush Mount Speaker Mesh Grilles
• Designed for use in select Rockford Fosgate Punch V2 speakers
• Flush mount design for a seamless appearance
• Ideal for mounting low-profile speakers with shallow grilles

Rockford Fosgate Power T1 T1D215

2000W Peak (1000W RMS) 15" Power Series Dual 2-ohm Car Subwoofer

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2000W Peak (1000W RMS) 15" Power Series Dual 2-ohm Car Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 2 ohm
• Kevlar Reinforced Pulp Paper Cone
• Santoprene Rubber Surround
• Mount depth: 8.39"
• Sensitivity: 88 dB

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$849.99

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Rockford Fosgate Power T2 T2S2-13

4000W Peak (2000W RMS) 13" Power Series Single 2-ohm Car Subwoofer

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4000W Peak (2000W RMS) 13" Power Series Single 2-ohm Car Subwoofer

• Peak Power: 4000 watts
• RMS Power: 2000 watts
• Impedance: Single 2 ohm
• Glass Fiber Cone
• Injection molded foam Surround
• Mount depth: 9.7"
• Sensitivity: 87 dB

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$1,099.99

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Rockford Fosgate RFW12-250

12 AWG Speaker Wire 250 Foot Spool Frosted Black/Silver

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12 AWG Speaker Wire 250 Foot Spool Frosted Black/Silver

• Meets or Exceed AWG specifications
• Conform to the CEA-2015 industry standard
• BC-5W2 spec for use on boats and non-commercial marine vessels
• Pure Crystal-Oxygen Free Copper (PC-OFC)
• 12AWG (3.31mm²) 294 strands

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• Meets or Exceed AWG specifications
• Conform to the CEA-2015 industry standard
• BC-5W2 spec for use on boats and non-commercial marine vessels
• Pure Crystal-Oxygen Free Copper (PC-OFC)
• 12AWG (3.31mm²) 294 strands

Rockford Fosgate Power T1 T1D415

2000W Peak (1000W RMS) 15" Power Series Dual 4-ohm Car Subwoofer

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2000W Peak (1000W RMS) 15" Power Series Dual 4-ohm Car Subwoofer

• Peak Power: 2000 watts
• RMS Power: 1000 watts
• Impedance: Dual 4 ohm
• Kevlar Reinforced Pulp Paper Cone
• Santoprene Rubber Surround
• Mount depth: 8.39"
• Sensitivity: 87.5 dB

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VIP Product Get $85.00 in rewards to spend later

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$849.99

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Rockford Fosgate Power Marine TM400X4ad

400W Class AD Power Series 4 Channel Marine Amplifier

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400W Class AD Power Series 4 Channel Marine Amplifier

• 100 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class AD 2 ohm Stable 4-Channel Amplifier

FREE NVX Amp Kit at Checkout!
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• 100 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class AD 2 ohm Stable 4-Channel Amplifier

Rockford Fosgate Punch GF-675

Flush Mount Mesh Grilles for Rockford Fosgate 6.75" Punch V2 Speakers

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Flush Mount Mesh Grilles for Rockford Fosgate 6.75" Punch V2 Speakers

• 6.75" Punch V2 Flush Mount Speaker Mesh Grilles
• Designed for use in select Rockford Fosgate Punch V2 speakers
• Flush mount design for a seamless appearance
• Ideal for mounting low-profile speakers with shallow grilles

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$69.99

Available

Ships in 10-14 days

• 6.75" Punch V2 Flush Mount Speaker Mesh Grilles
• Designed for use in select Rockford Fosgate Punch V2 speakers
• Flush mount design for a seamless appearance
• Ideal for mounting low-profile speakers with shallow grilles

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    FAQ for Universal-Fit Audio & Electronics in 2003 A4

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2003 Audi A4?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your A4.

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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.