Thanks for the info. I have 511B's and am wondering what the lowest acceptable crossover frequency would be for 'civilized' home use (no earthquakes, etc.). If the 511B's are not good to 500 Hz, which horns would you recommend? I would like to stick with 1st or 2nd order because I suspect that the more complex networks will be more difficult to optimize, and simpler is often times better.

Regards,

AstroSonic