Aadams Posted March 1, 2019 Report Share Posted March 1, 2019 I just noticed this today. Boston CR65 nominal 5 inch cones have a dust cap that is not like any dust cap on any speaker I have ever had. Notice the photo below: The bullet shaped dust cover remains stationary while a sleeve on the cone moves over it. Is this a common construction these days. The cone driver crossover is 4200hz, about 1khz higher than the point where it would become beamy using the 13560 rule. Does anyone know the purpose of this form of design? Just curious. Quote Link to comment Share on other sites More sharing options...
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