Dynaudio only makes speakers, that I can recall. now, you can add an amp and still use the components in the car. Sometimes that works well, since the Headunits don't really put out what they say they put out..
If you want to run separate output per speaker type, then I would do a DSP if you want serious control over the output, if not then just get a decent amp with built in crossover.
If you want to run separate output per speaker type, then I would do a DSP if you want serious control over the output, if not then just get a decent amp with built in crossover.