Hi, my cousin had a party last night and for music, he connected his MP3 player into his amp which was driving his speakers, and then connected his dads amp into the line-out of his amp, so had another two speakers. Now being a party with lots of drunk young teenagers, they kept turning the music up perhaps louder than it should have been! At one point quite early in the party, my cousins speakers started playing up. One of them was really crackling and the other wasn't working at all. So he turned off that amp and just had his dads two speakers going. Then 20 minutes later or so, we tried his two again, and they worked fine! Whats that about? But then, towards the end of the party his dads two speakers did exactly the same as his had - one stopped and the other was crackling. Now why would they do this? I didn't have the chance to try them again since, because the party was in the garden and we have since taken it all back inside. His Dads speakers are about 25 years old, do you think they are buggered or may be ok? What exactly happens when a speaker "blows" anyway? Cheers!