Hi I need urgent help!!!
I run a music night at uni and have 9 speakers - 5 of which aren't currently working! I don't know how to work out what's wrong with them though! Someone's told me that it could be a fuse, although there don't seem to be fuses in any of the speakers, probably because they all run off the PA power. Therefore I suppose it could only be the cones? Are these easy to replace?
Broken speakers:
McGregor with a 15" 200W Cone
2x McGregor with a 12" 250W Cone and a tweeter <= no sound comes out of these speakers at all. Is the only possibility that all parts are broken?
2x Unnamed speaker with 18" Cone => both of these stopped working after someone turned the power off in the wrong order- does this help work out what's wrong?!

Thanks for any help you can give me!

CharlieRizzle