Originally Posted by mistryn
Yes i have rear pdc
If you dont use the rear HU output, your rear gongs will be very quiet, barely noticeable. Unless you don't really mind, I'd say either connect all 4 outputs to the XD, or if possible join front and rear outputs into 2 channels into the XD. Both ways you will get rear PDC gongs from your amped speakers, so your fronts.