Rkissner: "Malcolm02, when you indicate the .1 channel, what do you mean?"
The .1 in 5.1, ie. the subwoofer/LFE channel. So your speakers are running full range for the 5 main channels, which yours are capable of handling, and the subwoofer is only handling the channel that is explicitly assigned to it. Simple and straightforward, and you can spend more time listening to music and watching movies and less time fussing with crossovers. My 2 cents anyway. Or you could experiment with crossing over the center and surrounds, but you mains are flat to 20Hz, right?