klipshorn speakers

They don't do super deep bass, but they will play very loud without effort. I added a pair of 15" direct radiator subwoofers to a pair of K-horns years ago. my die-hard horn-loaded-only friend was impressed with the extension. I think I crossed the subs somewhere around 40 Hz and they would play down close to 20 Hz. Those subs could seriously shake the house with a couple hundred watts each. The K-horn didn't need nearly as much power to keep up with them. If I was willing to shatter my eardrums I'm sure the K-horns could have left the subs in the dust.

Excellent speakers - but you may wish to Google their dimensions before giving your blessing.  :o)

+1 asctim
They get crazy loud, but bass shaking not so much. I ran mine with a Velodyne 15" sub and that did the trick. 

I'm running corner horns with 2 watts and  Soft Serve by Soul Coughing will punch you in chest and vibrate furniture.
You realize premature deafness is a possibility with the sound pressure levels these can produce with very little wattage?

It's a LOUD choice.. I've actually herd a few older Horn loaded units that were WAY cool. Then there are the "JUST LOUD" ones too..

They have a cult following too. It's not cult like IT'S A CULT. :-)

They were a PA right? Watch the watts for sure.. They are made for valves...Takes a bit of the edge off that sharp horn signature too..

Regards