Ok... probably a silly question... but I'm wondering what these inputs/outputs are for and how they should be jumpered on a NAD 7600 receiver. Essentially the receiver has a tuner, pre-amp, and power amp integrated in it. To operate normally, you leave jumpers in to bridge the pre-amp and power amp. I think the proper configuration is to connect the left and right channels from the Pre Out to Normal In. ??? If you want to just use the power amp, I believe you remove the jumpers completely. Where would you input the signal from the pre-amp outs of another receiver? To the Normal In? Or the Lab In? Or... ??? Basically I need to figure out what the 'normal' configuration is for the jumpers, and how to just use the units power amp (receiving the pre-amp out signal from a home theater receiver to drive the front speakers). Also, what is the Lab In input for?? I hope this makes sense... any help will be GREATLY appreciated!