Wayne Parham Messages: 18792 Registered: January 2001
Illuminati (33rd Degree)
A horn is like a megaphone. It is designed to point the sound, and make it louder in a targeted area. A bass reflex speaker is not directional. It's main feature is that it uses a Helmholtz resonator to improve bass response.
But what is the structural difference? Based on looking at pictures, it looks like horns have a hard surface (wood or plastic) that vibrates the sound out rather than a paper cone.
If that is correct, is the "thing" that vibrates the wood or paper the same thing?
Wayne Parham Messages: 18792 Registered: January 2001
Illuminati (33rd Degree)
The horn and the radiating diaphragm are two separate things. The diaphragm can be made of any material, just like a direct radiating speaker. You'll see paper, plastic, cloth, metal and composites.
Compression horns put more pressure on the radiating diaphragm than it would have without the compression chamber. There is a constriction in area between the diaphragm and the horn throat which causes pressure to be higher than it would be in free air or mounted on a baffle. So for this reason, the radiating membranes on drivers that are designed to be used on horns are often made more rigid than general purpose drivers.
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