On Mon, 20 Nov 2006 09:15:56 GMT, (Don Pearce)
wrote:

On Sun, 19 Nov 2006 19:50:00 -0000, "Fleetie"
wrote:

So turn up the treble, and enjoy the much larger region off-axis.
Having to sit still enough to keep an ear (still don't know which one)
in perfect alignment with a tweeter axis is actually ridiculous beyond
words. (And you reckon *I'm* talking out of my hat?)

I don't have a treble control.

Yes, it is inconvenient, but usually when I listen, I'm just chilling
with my friends. Only seldom do I listen carefully and critically.

Have you any qualifications in acoustics?

Do you understand the relationship between tweeter diameter and
directionality?

You cannae change the laws of physics.

I repeat: If you're using speakers with conventional tweeters, then
yours will be the same. Doesn't matter what make they are, how much
they cost (or how cheap they are). It's physics.

Trying to tell me that my speakers are crap is very easy to do, but hard
to back up with facts. Are the laws of physics and mathematics different
in your world? My degree, by the way, is basically in the mathematics and
physics of sound wave propagation. Not that that affects how speakers
behave, of course. Nature doesn't care what I think, or what you think.
It just _is_ as it is.


Martin

OK - done some maths for you. I've analysed a 25mm domed tweeter, a
50mm domed tweeter and a 50mm flat tweeter. The third was surprising.

http://81.174.169.10/odds/tweeter.htm

d


Not reading, Martin? Just for the hell of it, I've now analysed a
whizzer cone, beloved of full range speaker makers. That was even more
surprising than the flat tweeter, and worthy of some more study - just
for the hell of it, you understand.

d

--
Pearce Consulting
http://www.pearce.uk.com