I was wondering what you all knew about any horns designed for loading the corners of a room in the vertical direction as opposed to between the wall and the floor as I believe(forgive me if I'm wrong) Wayne's Pi 7s do? I'd love to try some true bass horns but space just does not allow for the free wall/floor space. Any ideas?

Thanks and I hope to see a few of youse guys at the N.E.Valve Bottlehead, Tube, Hi E., whatever, Beef Blast at Steve Culton's on the 24th.

G.

What do you mean by "in the vertical direction"?

Another way to look at it is that the corner forms a three-sided pyramid-shaped conical horn having an expansion equivalent to a four-sided horn with 70o wall angles. It's sort of like a giant 70o CD horn. But below 35Hz, the wavelength is long enough that the entire height of the wall/corner junction comes into play, not just the expansion from the floor apex. At very low frequencies the launch corner isn't a three-sided pyramid but rather it is a four sided boundary having horizontal flare of 90o and parallel vertical sides. This is a different spatial orientation than the corner apex triangular pyramid, and has a different expansion rate. It acts like a tightly constrained space with increasing directivity as frequency drops.

To illustrate, see the following charts:

G.

G.

There are problem rooms, like those with raised hardwood floors or those with closet spaces or halls that develop annoying resonances. But those conditions color sound enough that you can even hear it when you're just talking. They have that "singing in the shower" quality, a resonant chamber that is obviously boomy in the midbass and lower vocal range. These will cause problems for any sound system installation, and aren't limited to cornerhorns.

If I have two good corners to work with, I'm going to use π cornerhorns. They're great for most rooms of 500 to 2000 square feet, as long the corners are right.

My own experience with multiple small ceiling-corner speakers at Storrowton Tavern is all positive. Very nice bass with little effort - just BR boxes stuffed up into the corners with 1354s in them. Horn reinforcement of the bass is obvious. It's out of your way, but if you come over to 91 instead of taking 84 to Steve's we could thrash them for a bit before the lunch rush.

John