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Author Topic: Definition of Short- Medium- and Long Throw  (Read 3021 times)

einarg

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Definition of Short- Medium- and Long Throw
« on: April 22, 2004, 06:14:37 pm »

Loudspeakers are described as short- medium- or long throw,

Does anyone know the definition, in meters or feet, if there is one?

eg
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Tom Young

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Re: Definition of Short- Medium- and Long Throw
« Reply #1 on: April 22, 2004, 08:32:50 pm »

There is no textbook/technical definition that I have ever seen.

But in the context of what I have seen on the road and in the field, it's more a matter of Q or directivity (coverage) than anything else.

short throw = fairly wide, low-Q directivity. Such as 90x40, 120x40, etc.

medium throw = medium-Q and such as 60x40.  

long throw = narrow, high-Q directivity. Such as 40-x40, 40x20, etc.

In a typical installed cluster, the upper tier is made up of 2-3 long-throw (narrow coverage) horns that are capable of projecting energy a long distance to hit the balconies.  Below these, the middle tier has medium-throw devices that cover the middle-to-upper orchestra seating.  At the bottom is a single or dual short-throw (wide coverage) device that covers the front rows and lower orchestra seating.

One other element of why these are designated short, medium or long throw is the amount of energy they deliver.  A long throw horn (40x20) provides more acoustic power and therefore can project further than the others.  Likewise, it also has a narrow pattern that does not spread out beyond the area to be covered (balcony).

Make sense, I hope ?



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Tom Young
Electroacoustic Design Services
Oxford CT
Tel: 203.888.6217
Email: dbspl@earthlink.net
www.dbspl.com

ProSoundWeb Community

Re: Definition of Short- Medium- and Long Throw
« Reply #1 on: April 22, 2004, 08:32:50 pm »


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