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RE: and they... umm... tend towards harshness :-p

Great Plains Audio/GPA acquired the tooling from EV to make the diaphrams for the T35/T350, however they ran into a problem in sourcing suitable phenolic bases which the voice coil was wound onto. I talked to them at an audio show several years ago about this, but it does not seem like they have had any luck with it as the last time I looked at their website the T35/T350 was not even mentioned. The problem seems to be the difficulty in producing these phenolic bases with accurate and consistent weight and compliance. EV seemed to have some issues too in this regard down through the years. I had a pair of old 16 Ohm T35's and one of them had a nasty resonance. Taking them apart everything seemed mechanically nice and tight and the same, but I wound up gluing a tiny bit of extra gasket material near the outside of the voice coil which tamed the resonance down. So if you want to rephram an old T35 be prepared to do some fine tuning. Previously I rephramed a T35B some years ago with one of the then available foreign made diaphrams and was disappointed with the result. The T35 and T350 use nominally the same diaphrams, but the T350 has a larger horn and phase plug, plus a larger alnico magnet. I recall Klipsch stating at one point in a Speaker Builder/Audio Am article that they inspected all their EV tweeters for quality control. I wonder what happened to the rejects.

Paul

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