I think my friend is a little concerned about clipping and compression from a 15 watt amplifier if used to drive the Jordan's. I know he would not like a big solid state amplifier, he is vacuum tube biased. He is afraid that he might even melt that little 5.5" Jordan down with such a beast. I hope he can get his speakers completed soon and find somewhere to borrow a 20 plus watt amplifier to find out for sure. Thanks Norris