Which component is preferred for doing the crossing over, the sub or the receiver? I just got a JBL PB-12 (even my wife likes it!) and am using the crossover on my JVC 9010 set at 80hz, with the crossover on the sub set as high as it will go (around 150hz). I don't think that there is a way to defeat either of the two crossovers, so which one should I set to around 80hz? The receiver is only adjustable to 80, 100, or 120. The sub has a rotary knob adjustable from 50 to 150hz. Also, does it matter if I've only got one RCA going into the sub from my receiver's sub out? Should I get a splitter and run it into both the L and R on the sub? The manual says it doesn't really matter, but seems like I read on here that it tends to work better with both inputs in use. Thanks!