Akhilesh---- Thanks for your reply---I'm starting at the simple to build point and then listen and go from there---I already have some ideas of my own but can't start until I get 2 pairs built to listen and compare---but must agree with your comment about trashing the driver to cover too wide a range---I met 2 EE's (by sheer accident) in a Radio Shack and they were both into PA systems---and I got an interesting idea of building 2way speakers and bi-amp directly to them ---then learn how to build a Xover and compare ---anyway isn't just about everybody using a Sub to get the bottom end bass covered ? Jim PS Wayne invited me to your january meeting and I hope to bring a pair then (if Santa is good to me) and spend a few minutes on that computer program