AR woofers surround reinforcement
I have to give you an input on the weight and mass of the cone assembly, coil, spider, foam of a 12 "ceramic woofers.
Pete b. And Luigifedele, weighed, measured the cone, coil etc. of the 12 "woofers. All is well, but the weight (and is missing in all the subsequent refoaming to the original) of the bead of thick glue around the inner ring of the foam, at the time, when I removed this material, the weight was a few grams, therefore in percentage on the high cone! Besides the fact that mechanica
Thank you for your technical answer, my curiosity was due to the fact that this ring on the surround I think appeared for the first time on the AR3a woofers with ceramic magnet and remembers the ring (of different material) placed on the external periphery of the woofer cone with Alnico previous magnet and cloth surround, I attach a photo with this ring highlighted