Hi bassboy, I have found that when the subwoofer is of a different make from the speakers then speaker level inputs are better since it filters out the frequencies produced by the subwoofer. I think this provides better integration than line-level. When the sub n speakers are of the same make then it is a much closer call but still I think speaker level inputs are better. I am talking of a hometheater though, I have not tried it with my hi-fi but I don't see why the case would be different. A cheap experiment to conduct, so I think you should give it a try.