DSP is only on the "Top Hi-Fi" (Carver) system. There are two different 10 speaker systems, the other being "Hi-Fi", only the the Top Hi-Fi is Carver. How do you know you have Carver? I thought the presence of the equalisation settings (church, jazz, concert) meant DSP, but now I don't think so based on
this page from WDS (both Hi-Fi and Top Hi-Fi have vehicle specific equalising). It rather looks like the presence of the speed dependent volume change settings is the easiest-to-tell sign of DSP. You can tell by the type of amp too, as shown in
one of my other posts. In addition, the DSP amp will have a coax connection for the CD player.
Unfortunately, the referenced WDS page has mangled the speaker location descriptions, so it's accuracy regarding equalising and speed dependent volume could be questioned. To further confuse things, if you pull the build sheet for my car (search this forum for url and login instructions to get yours), it says "Hi-Fi Professional System DSP". Yet I know based on my amp's part number I have Top Hi-Fi. Presumably the build sheet for the mid level system will just say "Hi-Fi System" or maybe "Hi-Fi Professional System"? Maybe someone who knows they have the mid-level system could check their build sheet? It'd be good to have an authoritative method to differentiate the two systems.