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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Re: Roger Russell's New Speakers posted by Pat D on October 26, 2006 at 19:16:49:
"I don't quite see how 3.5" drivers can have really wide dispersion in the treble and highs"They can't and they don't. It's strictly due to the diameter of the driver which inescapably must cause the dispersion to be reduced as the wavelength approaches the same dimension as the cone. The FR graph shows off axis response diverging significantly starting around 5 khz, by 10 khz it's down around 5 db, at 10 khz, around 10 db, and at 20 khz, it's down around 20 db all relative to the on axis response which itself falls rapidly above 10 khz. On axis FR actually starts a gradual rise at about 6 khz rising about 5 db at 10 khz and then falling about 10 db from there at about 19 khz. This is not good even compared to a typical 1" dome tweeter. One reviewer noted that sound was better when the speakers were toed in, testimony to poor lateral dispersion. See my more extensive comments below.
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Follow Ups
- Re: Roger Russell's New Speakers - Soundmind 07:06:44 10/27/06 (0)
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