My old speakers like to crackle even when nothing is playing (or should be playing). It's just somehow playing random noise and I can't seem to stop it without having to actually unplug the set from the wall (even when it's turned 'off', it still crackles like mad). It's really been bothering me lately when I'm trying to concentrate and the speakers are crackling and popping. >:/ Does anyone know what this is and how I can fix it? Should I just get a new pair?