I have a multi-room setup using A-Bus. I am using the line-out on the keypad and running it to an external amp which powers the speakers. I want to use a splitter and run left and right channels to both the amp and an active sub, but I read on a different forum that running a line out directly to a subwoofer may damage the sub in some way. I thought that the crossover on the sub would deal with that, but I wanted to check it out here before I did anything. If it does wear on the sub in some way is there a type of filter I can run it through to get rid of the high frequencies? Thanks!