[音箱] ProAC Tablette 50 Signature Tweeter Problem

My speaker is ProAC Tablette 50 Signature and find that one of the tweeter have no sound do you know is it scanspeak tweeter ?

If so then I am going to buy 1 or 2 is better ?

And where I can buy this speaker units ?

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crossover or connection problem?

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No, I already detach the speaker out and check only the speaker problem when I compare to other side.

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