2001 Audi TT Roadster Sub+Amp Install How-To - Audi Forums
1998 - 2006 Audi TT (Audi TT Forum)

User Tag List

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 07-25-2009, 12:18 AM Thread Starter
darkOne's Avatar
Join Date: Jul 2009
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
2001 Audi TT Roadster Sub+Amp Install How-To

So I told you guys I'd do a How-To on this one and here it is!

So first off, I have a factory Bose system in my '01 Roadster so that changes a few things from the other tut's I've seen online so far.

I am not an expert. I am fairly handy and somewhat familiar with working on electrical systems in cars, but my car audio installer buddy provided a lot of help and guidance throughout this process as well. If you're not familiar with these systems or how to do anything I've mentioned below, it may be best to keep doing your research or find some helpful friends. This info is provided to give others a good idea of what they're getting into and just one way to go about installing a sub in this vehicle.

This first picture is of the passenger side of the car in the rear. To get the panel off you have to remove the bronze/gold colored bolt that holds the seat belt there with a 17mm socket or wrench. To get to it you just pop off the cover that's there. Next, what I did was proceed to just pull off the little rings around the roll bars and scoot them up the roll bar a bit. Then you can just pull up the top panel part, it's just pins holding it. Next I went from the outer edge to the center edge when pulling the main panel off. Once again just pins holding it there. The center edge of the panel is just under the center piece where the sub is so I just popped the last pins and slid it out a bit! This step (removing the main passenger panel) is not 100% necessary but I found it useful for putting the power cord through to the trunk and also for more light while I was inside the trunk on the other side. More on that later! :P

Here's a closeup of the Bose amp. Nicely hidden behind the passenger, rear speaker. Not easy to access anywhere except the trunk. Which you must get into do anything... a flashlight helps. I had a shop light, luckily. The Blue-Green and Green-Blue wires at the top are the speaker wires for the sub, which I spliced my RCA line out converter into. Just merely twisted the positive L & R and negative L & R wires for the RCA line out converter together and soldered them to the stock subs wires then taped it up after zip tying the new wires to the old to prevent damage from tension. I will have to check which is positive and which is negative again and I will edit this post once I get some light to check for everyone. I am almost certain Blue /w Green stripe is the negative wire. You can always use a multi-meter to find out as well. So once the RCA line out converter is on there you can plug in your RCA plugs from whatever wiring kit you got and that's all set to go!

This is a pic of the amp from outside the car for a better view of where exactly it is. To get to it all you have to do is pop put the two pins holding in the middle cubby hole and remove the floor mat and the cubby.

This last picture is of the sub wires that I spliced into. They run clear across to the sub from the amp so they are very easy to splice into!

As for the power cable, there are posts both here and on Waks Wide Web detailing how to get it through the firewall. (Keep in mind the Waks Wide Web page is about a UK TT. The Glovebox is on OUR driver's side.) It's just as easy to remove the dash panel though.

The easiest way to do it is take a wire hanger and stick it thru from under the driver's side where you see the wires coming in. It's right above the kick plate but behind the rubber guard so you just have to bend it back to get access. The cables come through the firewall right UNDER the wire loom that the website I linked describes. So when you stick the hanger through try to poke the air box and then just go to the air box and pull it up and tape your wire on there! From there it's pretty self-explanatory as far as routing your cable from the front to the back. I used a plastic shim to get the wire under the panels all the way back and it worked wonderfully. Since I already had the passenger rear panel off I just tossed the wire into the trunk from there. For the ground I used a wire brush to remove some paint that doesn't show when the cubby is on and some self-tapping screws to secure it.

Now is when I forget which wire is the one I tapped the remote into so I will have to get back to you guys. I just used a multi-meter again so I didn't commit the wires to memory, unfortunately.

And from there it's gravy! I hope everyone enjoys the How-To!

Last edited by darkOne; 04-01-2016 at 01:32 PM.
darkOne is offline  
Sponsored Links
post #2 of 4 (permalink) Old 12-11-2010, 05:49 PM
Join Date: Dec 2010
Posts: 1
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)

I have a 2001 Audi TT Coupe and the same system you do. I want to keep the stock system as you do but I'm not sure about the pinouts. I see the blue-green, green-blue wires. But they seem to be going to the rear speaker. Any help would be great. Thanks.
Steve19Ohio is offline  
post #3 of 4 (permalink) Old 12-13-2010, 02:09 AM Thread Starter
darkOne's Avatar
Join Date: Jul 2009
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Originally Posted by Steve19Ohio View Post
I have a 2001 Audi TT Coupe and the same system you do. I want to keep the stock system as you do but I'm not sure about the pinouts. I see the blue-green, green-blue wires. But they seem to be going to the rear speaker. Any help would be great. Thanks.
If those are the wires that run to the rear sub (the center speaker), those wires are the wires that I soldered my inputs to. The stock rear sub still works and I can control the volume of both subs with the stereo and the amp controls. Since this is the stock sub's signal, it's probably the best one for my aftermarket sub too. If not, then just find the wires that do run the to sub and splice into those.

I used a wire stripper that strips the middle of the wire to remove some of the sheath, and then soldered the inputs to them. If you don't have one that does this, you can simply use regular wire strippers by clamping down and spinning around the wire to cut around the sheath (doing this twice to make sure you have a section you can remove). Use a knife to split that section of the sheath and then you can just peel it off.

Once again, this was a while ago so I don't remember which was positive and which was negative, but you can use a 9-volt battery to pop the rear sub to see which way is right. When you connect the 9-volt the correct way (meaning positive to positive, negative to negative), the initial "pop" will make the sub bump outwards. If it's wrong, it will bump inwards.

Let me know if you have any other questions.

Last edited by darkOne; 12-13-2010 at 02:16 AM.
darkOne is offline  
post #4 of 4 (permalink) Old 12-13-2010, 09:52 PM
westv's Avatar
Join Date: Mar 2010
Location: NC
Posts: 186
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
thanks that is very helpful.



SouthBendClutch Stage III APR Diesel Geek Borla
westv is offline  
Sponsored Links

  Audi Forums > Audi Models > Audi TT Forum > 1998 - 2006 Audi TT

Quick Reply

Register Now

In order to be able to post messages on the Audi Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

  LinkBacks (?)
LinkBack to this Thread: http://www.audi-forums.com/1998-2006-audi-tt/53322-2001-audi-tt-roadster-sub-amp.html
Posted By For Type Date
Untitled document This thread Pingback 10-08-2009 04:15 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome