I'm sorry Gus but we're all just trying to help you here and there just isn't any reason for there to be some kind of an ohm setting in the crossover menu. Is it possible you're confusing the "X-Curve" setting with the "X-Over" (crossover) setting? X-Curve goes from Off to -3 in 1/2 db increments . In any event, the first thing you have to do is to verify that the receiver is connected and set up correctly (we all make silly mistakes from time to time ) with all speakers set to Small and the crossover set to an appropriate number (80 or 100 etc). Then make sure your cable isn't defective (it happens) and then make sure the subwoofer is functioning properly. But it sounds like you just have a bum receiver. But I hope I'm wrong.