what do these drivers look like?

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Lojzek, not everybody is connected 24-7 with the internet. Imho it is not worth the trouble (postage etc). when you can buy these almost everywhere for 17 USD. And these measure very well.
The Madisound Speaker Store

That is NOT the same driver, the cheap drivers shown here by the OP are just that, cheap crud.

I don't think a full engineers assessment and report is necessary.

Executive summary: Avoid.
 
clearly Chinese.

The tweeters appear to be reasonably well made, but how good a copy of some other tweeter would only be known after testing.

Made for AV/HT applications (shielding cups on the back).

So, low to mid level.

Otoh, probably cheaper than the equivalent unit from PE/Madisound.

Shot in the dark. Unclear what you get.

Also if you have to buy it from overseas... unless you are there already?
 
Hi,

These Vifa's are not the same as the one's the topicstarter is interested in (which are not Vifas!). These Vifa's are good, measure well, come with a full datasheet, probably have a very good quality control and probably sound good. Hobby Hifi a German magazine did a very, very positive review of these cheaper vifa tweeters.

So why bother with a copy? Postage may level out any price difference... I am pretty sure they sell these cheaper original Vifa tweeters in Korea.
 
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