I got some cheap Ozaki 2.1 speakers off TradeMe for my dads computer. Now everytime he receives or sends a txt or call on his phone the speakers go "bzzzzt bzzt bzzzzt zzzzt" which is really annoying. He still gets this interference even when his phone is up to 3-4m away.
How can I get rid of this interference without investing in a new set of speakers? A friend suggested opening the woofer and wrapping the amp with tin foil. Will that work?