I am looking to install a 12" subwoofer into my 2003 audi A4, but have no idea where to start. I have a factory bose stereo, and I have hardly any audio experience, so detailed instructions would be much appreciated. Thank you

 

http://www.a4mods.com/index.php?page...tml&category=4
I would suggest that u make sure u get the right guage wire for starters. What type of sub and amp do u plan on running? Also the whole tapping into the stock amp i would suggest a easier method for tapping your loc to your signal. U can tap into the rear deck subwoofer. Its less hassle then having to take apart your trunk and there seems to be less static noise there then near the wheelwell. Let me know if u need more info.