Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Recommended Posts


I'm struggling to understand the factory M490 audio system in my '03 S. The head unit is a CDR23 and I have a CDC-4.

Specifically, I am interested in figuring out the amplifier: Porsche part no. 996.645.331.00, Becker model BE 6600. It is a MOST unit with a 2-pin optical input connector and a 20-pin input/output connector. Supposedly a 6-channel device.

Question is: Can anyone point me to a decoder for the 20-pin connector on this amp?



Link to post
Share on other sites
    You can remove these ads by becoming a Contributing Member.

  • 14 years later...

Hi guys. I know that this thread is somewhat dated, but does anyone know if the amp pins for the rear speakers are always active for this Becker 6600 amp? My car only has the dash and door speakers and I am trying to figure out how to get the audio out to rear speakers so that I can fit them. I have the CDR-23 radio and it has no active analogue audio outputs. I’m hoping the rear speaker pins on the amp are already active and it’s just a case of finding somewhere to buy the pins to put into the amp connector. 
Also, thanks Loren for posting this diagram here. I have scoured the internet for months trying to find this!



Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.