Yes, it is a beautiful thing! The filter was modified as you imagined. The problem before was that since my RTA software only went down to 20Hz, I had no reliable method to see what was actually going on down below that frequency. I did some speaker only, without crossover measurements, and modified the crossover to accommodate what the speakers needed. Seeing that flat line at 10Hz on the RTA and going strong to gawd knows how low is, FUN!. I think I would run into room structural limitations before I ran out of speaker SPL capabilities!

[This message has been edited by soundhound (edited August 14, 2003).]