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RE: Difference between 3.7 and 3.7i's

Are you sure the 20.7 have a lower mass midrange? For sure the midrange of the Tympani IVa are low mass with its 6 µm Mylar, AWG 32 wiring and dividing strips. I think the mass of the glue could be higher. In order to lower the mass of the midrange in the 3.7, you need to use thinner Mylar even for the bass. If you decrease the wire gauge you loose effiency. Calls for stronger magnets, a costly route.


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