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Old 10th July 2011, 11:02 AM   #1
Ronj is offline Ronj  Singapore
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Default Can anyone identify these tweeters?

Hi,

I got these tweeters from a local electronic parts trader... I got them cheap for something like US$6. I suspect these are Aluminium/chrome painted on paper cone? or are they made of some other material?

I am not sure these are from yet another nameless make from China or an OE part for a branded speaker system... It will be great if someone can identify these...


Click the image to open in full size.


Click the image to open in full size.
Thanks a lot in advance...
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Old 10th July 2011, 02:00 PM   #2
Ronj is offline Ronj  Singapore
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Ok here is some more info... They kinda sound like a midrange when I tried with a simple capacitor filter (2.2MFD bipolar). I compared it against my VIFA tweeter and I found that highs roll off much early on these tweeters...

So they must be one of those tweeters made specifically for white-van systems... $6 went down the drain The surface of the cone is smooth like a candy wrap, so I cant figure-out whether it is paint or some kind plastic or even for that matter Aluminium... But they are not sharp/shrilling like piezo tweeters or some China made brand-less cone tweeters I have seen...
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Old 10th July 2011, 02:23 PM   #3
sreten is offline sreten  United Kingdom
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Hi,

The cone is most likely mylar, a form of polyester, metal is very unlikely
without a seperate surround, and they don't look like paper either.

These sort of tweeters can be made to sound somewhat brighter by
using a low value series capacitor, the actual crossover point being
determined by the driver, not the capacitor. The c/o roll-off will
be 3rd order of some sort related to driver Fs and Qts. Electrically
the c/o point can be around 7KHz to 10KHz, depends on the driver.

TBH they look very cheap and cheerful, probably used in a cheap
audio system, not separately sold speakers, and probably never
sold as an individual item, probably from manufacturing surplus.

rgds, sreten.
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Old 10th July 2011, 04:30 PM   #4
Ronj is offline Ronj  Singapore
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Join Date: Jun 2010
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Thanks for that info... I thought Mylar comes always in brownish-black color. This one looks like chrome... So I was confused... My bad... It does feel like Mylar to touch... Interestingly the frame is all metal(iron) including the closed back basket... Not plastic... It does have some sort of part-number on it... Seems like some OEM stuff for a BPC stereo system or boombox...
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Old 10th July 2011, 11:16 PM   #5
sreten is offline sreten  United Kingdom
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Join Date: Nov 2003
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Hi,

Well I couldn't tell cone colour from the pics. FWIW metallising mylar film
is a very standard process for capacitors, so easily cosmetically used.

FWIW they look somewhat dated to me, very hard to judge quality.

rgds, sreten.

I was and still am a fan of the Peerless 2" paper cone tweeters.
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