Technically iasharkguarder is right //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
but a clipped signal can cause a breach of the thermal limits of the sub //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
There are only two ways to blow a subwoofer. To reach its thermal or mechanical limits. Now 80 im sure that there is more ways to blow a SE than just sending it a clipped signal. I know they are stout little drivers, but I could throw that sucker in a huge box and bottom the hell out of it or put it on 5kw and cook her mechanically.
As far as recones...get in contact with either David from RE (TeamPSI on the forum) or Scott from Fi can get you a recone.