To be or not to be? Digital DSP or not digital DSP?

[TerminatorX5]

Folks,

I am puzzled but I am sure it is simply due to lack of knowledge.

I have '02 4.6is with factory NAV and the other works. It has DSP, the DSP settings seem to work - as I change the settings, the sound of the radio or CD or whatever else, changes as it should be. In other words, business as usual.

The funny part is, that I have a CD changer that has 3-pin, 6-pin and a coax "pin" (so, is it digital or analog?), and I also have the DSP module that has bunch of connectors and also has a coax "pin". And the strangest of that all, the is NO coax cable between the two.

So, at this point I am totally confused - it seems that I have "digital" version of the DSP, since I have the coax on both the CD changer and the DSP. But they are not connected, and I still have the DSP functioning.

Any idea, what that setup is? Is it a normal setup? I got the car used, so I do not discount the possibility the coax was lost in the previous life - but why is the DSP still working? Check this link from the EAS about the way it should be http://www.europeanautosource.com/su...mod_id=2&id=11

Thanks,