All you can do is make it highly compromised

I wouldnt shorten a horn in groups youl miss your lows
- i would make the mouth smaller. That way the mouths will add when placed in close proximity.

You can compromise a basshorn down to using an 8" Peerless Csx on a 135litre 104db/1watt basshorn(50hz loading) But thats about it !

To get higher output,more larger capable driver.. eg Csx 10" or lab12 on 300litre horn with 2600cm^2 mouth for 50hz..

Cheers!

• labhorn infos

Depends what you call small. Using room reinforcement (and if your speaker is in a room why aren't you?) you can get down to the 3.5-4 cubic foot range with useable response to 25Hz no problem. You do have to keep the pathway long, which means a small mouth, and you have to toss the 'old school' reliance on hypex tapers. When 'going by the book' doesn't work sometimes you just have to write a new book.

There is a common misunderstanding that horns must be 1/4 wave long and mouth area must be 1/4 wavelength in circumference. This is only a rule of thumb. If a horn is flown alone, that's true, and length should really be 1/2 wave. However, that is rarely the case and almost never for basshorns.

Basshorns are almost always used on the ground, which cuts these values in half. Use a pair of basshorns on the ground and the size is cut by 1/4. In fact, the most common basshorn is actually 1/8th size. It is smaller both in length and in area. If used in groups, 1/8 size horn is all you need. This will be both shorter in path length and smaller in mouth size than 1/4 wave.