🚀 go-pugleaf

I think the solution to your problem already exists in previous posts to
sci.electronics:

Just build the nuclear weapon which was outlined recently, and, in order to
get away before it explodes, use the cheep one-time-only delay circuit which
was also discussed recently.

The resultant electromagnetic pulse oughta knock out the guy's stereo just
fine.    :-)

Seriously, though, you say that if we don't know the particualar situation's
details, we shouldn't comment.

Well, I wouldn't want to assist someone in committing an act of criminal
aggression without at least an explanation.
	(I've been watching CNN too much!   :-) )
I think what you're trying to do is impractical anyway.  If you really want
to take out the guy's stereo, put 440V on his power line for a while.  :-)