In article , Fleetie
wrote:
"Eiron" wrote
What is the effect like using just one speaker? How big is your
tweeter? Have you looked at an analysis of directionality relating to
wavelength and driver size? There is a good one in Martin Colloms'
book 'High Performance Loudspeakers'.

Did it in my degree.

(Well, at least to 1st order, anyway.) Forgotten the formulae now, but
not the basic concepts.

Just found the simple formula for a 'piston' speaker in my copy of the
Newnes Audio and HF handbook. Too complicated to write in plain text
easily. :-) Can put it on the web if needed, though.

Put very approximately, you seem to get a half-power beamwidth of the order
of 45-90 deg across when the wavelength is similar to the diameter.

The tweeters are average size; a bit less than 1 inch diameter.

Must admit, don't have the book but have obviously heard of MC. Used to
do measurements for "Hi-Fi Choice" too, didn't he? I think that's where
I first encountered his name in the late 80s.

Still does reviews for HFN.

Slainte,

Jim

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