See all parts that fit your 2003 A4
Product highlights
8-volt Output Voltage • Chrome Finish • Subwoofer Phase Switch
Learn more about the rev40x
Connect your factory antenna to a new aftermarket radio for select 1973-2025 vehicles from Audi, Mercedes-Benz, Volkswagen
$7.99
List price $11.99
Install a new Single-DIN or Double-DIN car stereo in select 2002-2009 S4 and A4 and RS4 (Matte Black)
$27.99
List price $67.99
6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto (Sirius XM Ready)
$399.00
List price $600.00
Double DIN CD Receiver with Bluetooth and Built-in Alexa (Sirius XM Ready)
$169.00
List price $189.00
6.75" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto with Backup Camera
$329.99
600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers
$79.96
List price $119.99
6.8" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay, Android Auto, and SiriusXM Ready
$349.99
List price $420.00
7" Double DIN Touchscreen Digital Multimedia Receiver with Bluetooth, Apple CarPlay and Android Auto (SiriusXM Ready)
$329.95
List price $349.95
6.8" Double DIN Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, and Android Auto (SiriusXM Ready)
$599.99
List price $750.00
480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)
$84.99
List price $94.99
600W Peak (200W RMS) 6.5" DB+ Series 2 Way Coaxial 4-ohm Car, Marine and Powersports Speakers
$109.00
List price $119.99
360W Peak (120W RMS) 6.5" Club Series 2-way Coaxial 3-ohm Speakers
$99.95
List price $139.95
600W Peak (300W RMS) 6.5" Mille PRO Series 3-way 4-ohm Component Speaker System
$999.99
List price $1175.00
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• 3-way Passive Crossover Network
• Designed to expand a 2-way component system into a 3-way setup
• Ideal for adding a midrange driver to your 2-way component system
• Includes woofer, midrange and tweeter outputs
• Compatible with AudioControl PNW and Altitude Series speakers
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$159.00
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• 3-Way active crossover with sub-level control
• Mixed input and output
• Level output knob with individual output
• Features front and rear high-pass filters
• Includes remote subwoofer level control
• Stereo or mono subwoofer mode selector
$124.95
List price $122.99
• 5-Way high-voltage active crossover
• (2) front and (2) rear/sub inputs
• High/mid, high/mid/low, and mid/low outputs
• Features clip indicators
$239.95
List price $287.99
• 2-Way/3-Way Electronic Crossover
• Bass boost (0-12dB @ 45Hz)
• Quasi-Parametric EQ
• 180-Degree Phase-Shift Switch
• Front/Rear Channel Frequency
• Front and Rear Adjustments
• RCA Pre-Amp Output
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$59.99
List price $99.99
• 2-Channel high-voltage external pre-amplifier with crossover
• Perfect for high-voltage amplifiers
• Selectable bass boost frequency
• Allows match of 2 or more amplifiers with same audio setting
$95.95
List price $115.99
Manufacturer:
Model Number:
REV-40X
Weight:
6.00lbs
Internal SKU:
rev40x
Internal Product ID:
234
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Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:
Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.
