Originally Posted by mob17
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.
I did not realise I would lose the pdc gong, I will connect the rear incoming to outgoing back up to the HU to keep the pdc gongs.
if I joing front and rear outputs onto 2 channels that would mean my rear speaker be amped not sure if this would be possible