Sorry Trooper - I forgot to answer your DSP question. I don't know the answer, but I assume if you have DSP you have another radio already, or maybe it is just a digital amp? My car has NO DSP, but has widescreen NAV which controls this radio (it's placed under the spare tire).

Please note, this is the round-pin radio, so if you wanted Sirius upgrade you would need a new style radio with flat pins.

Cheers,
Neely