Originally Posted by ClawAndTalon
Let me see what I can dig up.
Beware of anyone saying that a particular horn design is better in any remarkable way for sound quality. At the end of the day the different designs are based off of shape to accommodate placement. There are others that go somewhat smaller but need corner placement, or might not have full extension for HT movie use, but slam on music.
In any case if you find a DIY plan, look up reviews, get measurements...
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I have spent a few hours in various forums and here is what I have gathered. Maybe somebody can tell me if I am correct.
1-All horns have a taper to them, unlike a transmission line design.
2-Seems like there are two basic horn designs. Front loaded (FLH) and Back/Rear Loaded.
3-Front loaded has a sealed rear chamber for the driver and Back Loaded has no sealed chamber.
4-A Tapped Horn (TH) appears to be a special kind of back-loaded design where the driver is placed within the horn at a specific point near the mouth (opening). Appears to be at this spot due to wavelength tuning.
5-a Scoop might be a back-loaded design as well?
6-A folded horn I think is basically the most typical front loaded design to keep things in a more compact cabinet
7-the Lilwrecker appears to be a back loaded, along with Danley SPUD and other Danley designs I think
8-Bill Fitzmaurice designs appear to be front loaded designs. Several popular designs are Tuba like THT = Tuba Home Theater
9-Tapped horns appear to be able to extend lower but have less bandwidth than front loaded, might be more efficient?
10-Tapped horns appear to be smaller than front loaded, but I think this is smaller relative to frequency achieved and not necessarily overall output.
11-Tapped horns are more limiting. Seems like they are more difficult to build correctly, require more specific drivers, and you can't change the parameters like in a front load. For instance, you can change the sealed chamber size on a front load to change some characteristics of the overall horn. With tapped you are stuck designing to TS parameters of the driver.
12- TH can unload and damage the driver below the tuning frequency much like a ported design whereas front loaded has sealed chamber to help act as a spring.
Again, these are a dozen statements that I THINK are correct. I am not stating them as facts. Would love if somebody could give me yes or no on any or all of the above.