"Dave Plowman (News)" wrote in
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It occurred to me when fitting some new car speakers that
a dual concentric design would be ideal for this use. But
they all seem to have tweeters just stuck on the front.
Any reason why this design has fallen out of favour?
A true dual concentric design like Tannoy's requires special parts and
tooling.
Depth is a big issue for autosound speakers, and true dual concentrics add
depth.
The tweeter of a typically-sized dual concentric driver - say 5 or 6 inches
in diameter, would be very tiny.
As others have pointed out, the KEF Q-series driver while truely coaxial, is
not built like a traditional dual concentric system. AFAIK, the tweeter is
not a compression driver.
http://www.kef.com/France/qseries/driver.htm shows a cut-away drawing.
I believe that there are standard minature dome tweeters that would fit in
front of the woofer pole-piece and within the diameter of the woofer voice
coil.