Quote:
Originally Posted by babydriver
I'm not sure how you get 10-12 Hz response out of a horn loudspeaker. The low frequency rolloff of a horn is determined entirely by the size of the mouth; the bigger the better. But you would need a horn with something like a 32 foot mouth diameter to achieve that sort of low frequency response.
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For a full wavelength horn, yes. A quarter wavelength horn doesn't need to be quite so big.
A gjallarhorn uses a single 18" LMS-Ultra 5400 driver, which is a beast. Here are some measurements on it:
http://www.data-bass.com/data?page=system&id=45&mset=42.
And a couple build threads with their own measurements:
http://www.avsforum.com/forum/155-di...orn-build.html
http://www.avsforum.com/forum/155-di...llarhorns.html
The othorn uses either a B&C 21" 21sw152-4 or an 18" TC Sounds 5100. It won't reach as low as a g-horn, but it takes over at 25 Hz and just walks away with it.
Data-bass:
http://www.data-bass.com/data?page=s...id=95&mset=102
Build thread:
http://www.avsforum.com/forum/155-di...orn-build.html
The data-bass measurements are ground plane measurements with no corner loading and only a high pass filter, so it's about as clean and unaltered as you can get.