Thanx Wayne. I feel a whole lot better now! I was planning on isolating a single frequency, like 12000 cycles (since i am croseed over at 16000 cycles) and attempting to calculate 1/4 the distance travelled by a sound wave at that frequency, and then put the tweeters ahead by that much. But you are right, that may not really be audible at all, especially given inevitable room colorations & other sources. and if i do put the tweeters forward, that may have worse effects because of interference with the main speaker baffle. I'll build small boxes for them and isolate them on top of the main cabinet, and then experiment with different positions. will keep us all posted! -akhilesh