Six speakers with four outputs - how is it wired up?

[lurkbot]

Edit: turns out there's an amplifier in the trunk, and each one of the six speakers has its own output. So that's how the Becker CDR-220, which has only four outputs, drives the six speaker system.

 

Original question: I have a 2001 996 with six speakers - two dash, two by the rear seats, two in the doors. But the CDR-220 head unit has only four audio outputs. So I guess the dash and door speakers run off the same output? Is there a crossover hidden somewhere in the wiring or do they all get the same full-spectrum signal? 

Edited February 20, 2016 by lurkbot

[KevinH90]

Look in the trunk and see if there is an amplifier slightly above and behind the spare tire.  If you have the door speakers, it is likely that the car came with one of the audio packages that included the amp. I'm not an expert on amplifier technology, but it has electronics that split and filter the signal and send them to the appropriate speakers.

[lurkbot]

Thanks, I didn't realize it was right there. I have a C4; here's a picture showing where the amp is located: http://imgur.com/UNZjxmT

 

So it looks like each of the six speakers has its own dedicated output. 

[KevinH90]

I didn't realize that you had a C4.  The front-drive components must have required them to move the amp to the passenger side of the car.  In most 996's and 986's it is right in the middle and mostly hidden by the spare tire.

 

If you didn't have an amp, I think you would only be able to power two sets of speakers.

[kbrandsma]

Crossover provided by AMP.  The door speakers provide low tones or the bass in your case.  All speakers should be replaced and will provide an immediate improvement in sound quality.

[zak996]

I have a '99 C2 and also changed out my speakers. The door speakers are split at the amp and thats where the crossover is also. Heres a post with the wiring diagram in it. http://www.renntech.org/forums/topic/27581-cdr-220-wiring-diagram/

 

Depending on what you're doing, you can use the stock amp and change speakers but I ended up taking it out and rewiring, it was easier than using the wires from the amp. After I labelled them all it was easy but its confusing if you are just looking back and forth from the wiring diagram. I can give you more details if you like, just PM me. 

 

Good luck