You can crunch the cone by bottoming out also. The 4hp is a pretty powerful motor so much inertial energy is built up and with enough power if the coil was to bottom out the moving mass of the cone would folder over the former thus causing the imprint. You can't mistaken a bottoming out it makes a decently loud door knocker sound and the end usually crushes in onto the pole piece and locking up, usually. I like the 4hp because it usually requires a small enclosure and I really don't want to switch right now. If I was to get it reconed is there a cone out there to stand up to the abuse? I was looking into a DD composite cone but in know way was I welcomed with open arms. I don't know what the big deal is over a cone/surround... ANy input is welcom...
Polo..