That's true, Wayne. I can't think of a solution for a single driver and 1 port solution, unless you put the driver 5 feet up and point it downwards (20 feet would be approx 60 hz) and maybe use a transmision line or something. Perhaps a fostex 167E driver in a voigt pipe like we heard at Jim Denton's house? It seemed really flat over 100 hz on my rat shack meter if I remember. What do you think? -akhilesh