We’ve tried the usual of calling police (three times), inviting them over to hear how loud it is (they agreed that it was very loud), asking to at least reduce the bass, blasting our own music (not sustainable) and so on. Sometimes it works for a day but inevitably it’s back to the usual.
Hoping for some petty revenge ideas to complement the other efforts.
Powerful radio signals will cause interference in anything aerial-like that they pass through. Speaker cables would serve perfectly. For FM signals this would just sound like static or horrible nosie, but AM the interference will sound like a distorted version of the sound signal. Interference in the speaker cables will pass to the speakers… I guess this is the idea, but you’d need a very powerful radio transmitter which would almost certainly be illegal.