Giorgio AR Posted April 19, 2019 Report Share Posted April 19, 2019 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 mechanically this "reinforcement" on the foam changes its response to oscillations. All refoamed woofers, I think they need to be weighted on the periphery of the cone? What do you think , I am attaching a photo where you can see very well this ring on the foam of a 12 "woofer, ring that I found on all the original untouched AR 4", 8 ", 10" and 12 "? I found the ring of "glue" of an 8 "woofer (I didn't find the 12" ring), it was photographed, above and below and measured the width, about 5 mm., 1/5 ", I don't have a scale to weigh the ring. Does the presence of this ring as well as suspension damping make sense as adding weight to the cone in the periphery and for stiffening the cone? The first photo shows the ring of a 12 "woofer with the arrow, the other three photos illustrate the 8" woofer ring Quote Link to comment Share on other sites More sharing options...
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