The ubiquitous 1/2"...um....3/4"...er 1" ?? polycarbonate "dome" tweeter - Page 2 - diyAudio
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Old 4th September 2011, 09:49 PM   #11
Apex Jr is offline Apex Jr  United States
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Dave....
I still have quite a few of these in stock, say 4000 still in stock
and am still offering the DIY Audio 1/2 off sale at .50ea.

And on a side note I still know I owe you some, so will include
in your next order....

Steve
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Old 4th September 2011, 10:09 PM   #12
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Steve,

I am never worried about being taken care of when it comes to doing business with you... probably need some more panelmount RCAs next, Daniel is smoking thru them

dave
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Old 6th September 2011, 05:03 PM   #13
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Quote:
Originally Posted by sreten View Post
Some have experimented with opening up the pinhole, for tuning.
Can that pinhole make a significant difference as far as sound quality? Because the other domes I have seen with lenses (phase plugs?) that include a hole, that hole is much larger than this tweeter's pinhole.
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Old 6th September 2011, 05:27 PM   #14
sreten is offline sreten  United Kingdom
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Quote:
Originally Posted by River757 View Post
Can that pinhole make a significant difference as far as sound quality?
Because the other domes I have seen with lenses (phase plugs?) that
include a hole, that hole is much larger than this tweeter's pinhole.
Hi,

One would assume the pinhole makes next to no difference, its styling.

I remember a UK kit speaker that claimed the provided tweeters had
an optimised modified opened up central hole, easy to say, but no
real hard evidence I recall that this was the case. Your right IMO
to have an effect the hole must be a lot larger. There again there
are fine tweeters with no central hole at all, so what gives ?

I don't know, here only measurements tell the truth.

rgds, sreten.
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Old 7th September 2011, 06:41 PM   #15
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Mordaunt short have also used this style of tweeter I think before the last time they went bankrupt (they have gone bust a few times). In the speaker my friend owns they are are combined with an 8" ported woofer in a ~35L cab and work quite well.
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Old 7th July 2013, 03:17 AM   #16
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How about a Foster 9324 tweeter? It looks to be a polycarbonate, it has a lens/ waveguide with three plastic arms holding a small cylinder above a black diaphragm.

In terms of what kind of dispersion it has, is all of the diaphragm that is visible the moving surface? I'm seeking a tweeter that would start beaming at about 10 kHz, and am wondering if the Foster would fit the bill.

Regards,
Pete
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Old 8th July 2013, 12:45 AM   #17
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Default Foster 9324

Removing the faceplate from the motor and diaphragm, the polycarbonate starts out first as a cone (concavity), then at the center is a small dome. The outside diameter of the polycarbonate is about 7/8" (22 mm).

Also I was wondering if the waveguide affects dispersion.
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