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I thought about it for a while, and they are not for me. For the cost of one diaphragm I could buy a pretty good pair of speakers.

Thanks, basically a 1 1/2"-2" adaptor.

Are the throat adaptors on a TD-4002 specific to a TAD, or do they fit from other drivers? I can't even find the dimensions of the driver without the adaptors, I just found a low resolution picture.