is there something you can buy to interfere with a neighbours stereo which plays 24/7?

Question

ear plugs do not work any suggestions

Answer 1

go over and talk to them. Maybe they don't know that it bothers you or how loud it actually is. But be polite about it. You don't want to get their back up. Maybe ask them if they would come over to hear for themselves. If that doesn't work, then call the police. They do come out for noise violations. If you live in an apt., talk to the super or owner.
hope that helps

Answer 2

if the above fails (read that suggestion first) then there is a time proven way-its called "turnitdownoriwillsmashitoveryourhead"-a bit long-winded i know-but results gauranteed. and cheap to boot.