My strong reaction in this case is that the signal from the monitor output on the mixer was low, as we only send the vocals to these stage monitors. The second 8” speaker is connected to the master out on the first (daisychained). We dont play on huge stages and we keep all volumes low, as we play mostly for older people, in rest homes, afternoon dances, sometimes weddings, etc.

I agree with both of you that a too strong signal into the amp could cause clipping, with DC to the tweeter coil. But this tweeter or tweeter amp just died silently reproducing the singers voice.

Btw, both of our old power amps (Crown 600W) has a DC protection circuit cutting the output to protect the speakers. I think that the latest technology in these EV also has such system.

Aulis G