My father is currently running a Sony ES STR-DA3ES receiver (my old receiver) a Sony DVD Player, Polk Audio RM6600 series satellites and center, a 55" Mit. widescreen and a cheap ass KLH powered sub. My question is, I gave him one of the PSW 450's, according the Polk they highly recommend hooking up the Polk way, via speaker inputs and outputs. I was wondering should I do it the Polk way or should I just get a sub cable and go from the sub out on the AVR to the LFE IN on the 450. What would I gain/lose from one to the other. Thx.