Originally Posted by neonplanet40
What does that mean? Surely if they are faulty i shouldn't have to pay anything?
Thing is, if it's you that's made them faulty, you'll have to pay. Sorry

And tweeters generally blow more easily than mid/bass drivers if you've pushed too hard.
I'd have to disagree that setting the amp volume at 70% is problematic though, unless 70% of the amps power is a good bit more than 100% of the speakers power handling. My Arcam amp goes to 72 on it's numeric scale, and I've been assured by Arcam that 65 is perfectly acceptable for the amp.
I would agree that clipping could cause the problem though. It generally occurs when the amp is going full-pelt, and simply can't deliver what it should, therefore it "clips" the output. The output is distorted, and without going into the science of it (try Wiki

), basucally it sends something to the speakers that's not terribly speaker friendly.
As has been said, just swap L&R speaker cables about at amp end. If the same speaker has the same fault when driven by the other channel, it's that speaker, not the amp.