I just had a pretty frustrating experiance with a car stereo install in my newly purchased 2003 Audi A4.

First, let me say that I successfully installed Sirius and a new BOSE OEM headunit with sat support (Thanks TeddyB!!).

Then onto the amp/subwoofer install. I found a remote from the HU wiring harness, ran power through the ECU and onto the trunk, grounded the with a bolt underneath the rear seat, connected the subwoofer and went to steal the audio off of the rear factory subwoofer using a line output converter.

While searching for the factory sub wiring to tap into, i found a factory amp behind the carpeting on the right side of the trunk. For some reason i thought my speakers were all powered off of the headunit; all the posts i read said the amp would be visible without moving anything.

So, I tapped what i am pretty sure is the subs wiring from the amp into the converter - no sub action.

Then, I tapped a pair of line level inputs and ran them into the converter (I know, i could just tap in with some RCA's and go right to the amp, but i thought the converter would still provide a signal) - this time i got sound out of the sub, but it was very quiet.

I'm starting to think the wiring diagrams i'm seeing around the forums for the bose amp are different than my year, or i'm doing something horribly wrong.

Thanks all,

Aaron

 

not my area im only into fixing cars but could it be your asking too much power from a standard system to power your subs

 

I assume you are installing an amp for your sub. Ditch the convertor and pick up a line level signal going into the stock rear amp.

 

dont do any of that stupid ****, wire in a set or RCA's directly behind the head unit its the best way to go for anything even close to decent sounding, a linelevel converter is a big piece of **** and will never work properly.... as onepoint8tee if you dont believe me wiring in the RCA's is the best way to go man

 

Thanks for the help! I'm going to attempt the RCA splice at the headunit harness.

While searching around i found this article that show my amp exactly and how to get to it...

Wish me luck.

 

good luck

 

"wish me luck"

"good luck"

LOL, thats great

 

lol well thats what he asked for lol

 

Yeah, I hooked in behing the HU because I wanted to control the cable and how/where it was routed, but most people have tapped into the factory wiring in front of the rear amp with good results. I wouldn't do it myself, but it is a hell of alot less work.