What are you looking for, Steve?
If you just pop the top off, I'll bet you can see who made it just by looking at the chips. Any Pioneer chips and you have your answer. I suppose you could also google to see who has an OEM division in Portugal.
The WIS has some info about the connectors. All the source signals come from the EHU. From the looks of things, the signals get divided/equalised in the EHU and the amp just amplifies the sounds. So, again, looks like no full spectrum available. If they are sending low-level signal from the EHU to the trunk via copper they should have used shielded cable. Does it look that way? Otherwise noise might creep in.
If you have the 4 speaker set up in your Saab my07 then there is no
Way to upgrade the system with the a Saab audio upgrade because my 07 cars
Aren’t wired for the upgrade. (i've had this confirmed by 2 saab dealers) I know because I’ve just brought a my07 (new dash) Saab 9-3 with the 4 speaker audio System. the dealer said if i, brought the car he would upgrade the audio System for me to 7speaker system thinking it was the same as the my06 cars
But is completely different and there is no upgrade.
So my dealer is now paying for an audio specialised to install an after market
It's the 7 speaker setup.
Already have some ideas about adding Line converters to the speaker wires and adding aftermarket amp and sub as I did in my 2003 Aero, but just collating info before I start.
Be sure to post pics and details of any work the Audio Specialist carries out, and if possible get some details from them on how and what they do. I'm sure there will be lots of thanks coming your way.