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7 Aug 2014 19 Aug 2009 2005.5 Sprint Blue Pearl Audi S4 Sedan 6MT Corsa w/ 12" Re: B6/B7 S4/A4 DIY: Replacing stock sub woofer. i got a question does your car 12 Dec 2017 Upgrading Speakers for Non-Bose B6/B7 Audi A4 The first step is to remove all four door cards, you can follow this walkthrough: . Try installing an aftermarket head unit and bypassing the amp, or installing sound deadening sheets such as19 Oct 2017 15 Jun 2007 I have a 2007 Audi A4 B7 with the Audi Symphony. NOT Bose, and I am wondering the best way to hookup a sub with an AMP in the trunk ? I am really doubtful the headunit has RCA outputs so I am wondering the best way to hookup the sub and amp ? I have received several questions regarding installing a sub/amp off of a stock head unit. It is not as To do this, refer to the sub-box or amp rack install guides. 8 Oct 2014 HI Guys, Has anyone attempted to install a subwoofer in a 2003 A4. I just got the and I love it. I replaced the stereo with an Alpine CD/Ipod control unit, it was easy, now I want to upgrade the sub. I take it youve got a B6 A4.