Basically the heading says it all. What are these out-puts for? I'm using(abusing) a Sony STR DB-940...for my dollar an excellent amp, so theres an RCA jack for each channel, 2 for the sub's. What are these actually for? Can I use them to feed the line level in-put of a powered sub to dedicate a LFE to each channel? Can I use them to feed a signal to an off-board amp, like seperates, to deliver even more power to each channel/speaker?.....Help!!! There are holes on the back of my amp that I havn't spent a s@*%-load of money plugging up!!!!!