I was thinking along the same lines as what Blkadr has to say. There may be something wrong with your amplification. I have never blown a cone LF driver and have used both the Phase Linear 400 and Hafler 500 amps and made spaced out errors with them as well. There are some drivers that are very fragile such as the ones that were used in the Spica line as this is their reputation. I do not know if this is the case with the Morel drivers. Repair sounds like the way to go unless you are bored with your current speakers and would like to start fresh. I would also have your amp checked out or at the very least contact the manufacturer and explain your experience. I was going to suggest blowing up another pair of throw away speakers, as a test, if you have any available, but this may damage or further damage the amplifier. There is a custom among American male youths to perform such tests on green plastic army men. It is probably advisable not to carry this form of testing on, into the world of hifi, though I have witnessed adult audiophiles doing this very same thing. The manufacturer of your speakers may also be able to shed some light on this tragedy. I do not know if British brands are readily available in you trade zone. But if they are and you would like new speakers you may want to check out Spendor, Harbeth, Castle Acoustics, Kelly Transducers, B & W and Linn (Scotland) also Coincident and Renaud.