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Bang and Olufsen (B&O) Subwoofer / Amplifier Add-On DIY - AudiWorld Forums
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How to Wire an Aftermarket Stereo to a Factory Audi Amplifier - YouTube
DIY Rear Speaker Replacement / Rear amplifier bypass - AudiWorld Forums
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Adding an Amplifier to an Amplified Factory System
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DIY Rear Speaker Replacement / Rear amplifier bypass - AudiWorld Forums
a4mods.com :: - The Premiere Audi A4 Modification Guide and Pictures Library
