The pads bonded front and back of the ABR are made of bituminised sheet, but I suspect their main function is to add tuning mass to the diaphragm rather than to damp. It is also implied that the HF1300 is a ring radiator and reference is made to a Voigt tweeter having a central spider. There is no central fixing on the tweeter diaphragm, it is really a type of dome tweeter with a wide suspension incorporated into the diaphragm surround.
The HF1300 is a wonderful device. It is not peaky at all, but can sound a bit hard on axis, which I think is a colouration effect, but it portrays ambience and depth incredibly well and despite having a large moving mass for a tweeter, it displays superb perceived transient response. I have a few sets of various versions of these.
For a bit of fun, keep an eye out for the Ditton 120. It's like a miniature Ditton 15 and has a BIG sound that totally belies its small dimensions. They are rare!
Originally Posted by walpurgis
The pads bonded front and back of the ABR are made of bituminised sheet, but I suspect their main function is to add tuning mass to the diaphragm rather than to damp. It is also implied that the HF1300 is a ring radiator and reference is made to a Voigt tweeter having a central spider. There is no central fixing on the tweeter diaphragm, it is really a type of dome tweeter with a wide suspension incorporated into the diaphragm surround.
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