B5 Rear speaker replacement guide
 

I love you!!! post the pics please

Adding amp to stock HU while replacing rear speakers.
 

Okay, here you go:
Here is the speaker that has the built in amp. You will need to first disconnect the harness. A good tug does it.

Adding amp to stock HU while replacing rear speakers.
 

Here is the harness after you cut the wires.

Adding amp to stock HU while replacing rear speakers.
 

Here are wires that I splice in the RCA cable.

Adding amp to stock HU while replacing rear speakers.
 

One of the three main wires that I spliced a new wire onto using butt connectors. This white is the remote. Taping was still better.

Adding amp to stock HU while replacing rear speakers.
 

Once new wires were added, amp was mounted on the bottom of rear deck from inside trunk. I used short self-tapping screws with a cordless drill for quick and easy mount.

Re: B5 Rear speaker replacement guide
 

this is awesome thanks. so it wont matter if you install a big amp or big subs will it?

Re: B5 Rear speaker replacement guide
 

Running a big sub won't be a problem as it will come off an appropriate amp. Running a big amp may be problem. The power line to the rear is a small gauge - probably 14-16. For major amps, you'll likely want to run a separate power line that is a good thick gauge 12 or thicker. The more power, the more heat that is generated along the line. Think what happens when if you wired your house with thin gauge wire: Fire hazard.

Re: B5 Rear speaker replacement guide
 

you think it can handle a 1000w amp? maybe .

Re: B5 Rear speaker replacement guide
 

I tried replying but my message didn't post. Here it is again.

With hefty 1000 w, I would run a new powerline with fuse. Not worth the risk. You'll need to drill a hole through the firewall to run a new line though. Let me know if you need some tips on doing that.