1st iteration with my amps they made some sort of whale song, started screetching, went louder, than stopped and started again. This was just a small capacitor in the feedback loop, changing it from foil to tantalum stopped it.
I guess so, some crazy feedback would overload the amp, those whale songs actualle went quite loud, could easily blow up the driver. Especially when you have an active amp, where in an ideal world each driver gets its own portion, but the amp decides to put way off frequencies in.