Combined means all 12V rails come off a single feed, split means the rails are split accross two feed's. I don't know the technicallity's of why split is meant to be better but n both cases all 12V lines are available.R B CUSTOMS said:oh... well you learn somthing new evryday
so im presuming combined is using both of the 12V cables, and split is if your just using one ?
WHY cant it just tell you than in simple terms in the instructions :S