I'll make the horns long and thin then. What confuses me is the scoops we always used couldn't possibly be longer than maybe 2ft long around the fold and they hit 60hz _hard_. I'd say they must have been good down to 40hz with the max from 60hz - 120hz, they definitely whallop that out. From what you say they need to be twice as long @ ~5ft~ to support this freq, what gives? Rgs, Kevin