[Nextgrid]

I've read a Reddit post a long time ago where someone used powerful amateur radio equipment to blow up a speaker wirelessly. Maybe look into this?

[ethbr0]

I'd assume this was exploiting speaker cables as an antenna and effectively inducing a high volume artificial signal in them (preferably at the bounds high or low frequency), that then exceeded the speaker capacity?

Alternatively, I've heard that speaker electronics don't like dirty signals. Would be curious what options EEs would come up with there.

[iasay]

That's probably bullshit.

[piker]

Used to pick up citizen band signals on my guitar amp. If it's close enough, there may be even legal source of interference -- although the intention to interfere may make it illegal.