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At how strong of a signal do you bash the DCX464's diaphragm into the phase plug in the first place? With a recommended lowest highpass of 300hz for the 464, I assume that you have a whole lot of displacement left if you cross if over at 650hz instead. So much so that you could probably go for a smaller diaphragm and still not bash it. After all, B&C do recommend a lowermost highpass at 400hz for the 354, so there is likely quite a bit of displacement left if you cross over at 650hz.The way I see it, the 354 is likely the new go-to for the PM90/60, given its smaller size, lower weight, (smoother top end?), practically identical output, improved design and most likely lower price than the 464.
At how strong of a signal do you bash the DCX464's diaphragm into the phase plug in the first place? With a recommended lowest highpass of 300hz for the 464, I assume that you have a whole lot of displacement left if you cross if over at 650hz instead. So much so that you could probably go for a smaller diaphragm and still not bash it. After all, B&C do recommend a lowermost highpass at 400hz for the 354, so there is likely quite a bit of displacement left if you cross over at 650hz.
The way I see it, the 354 is likely the new go-to for the PM90/60, given its smaller size, lower weight, (smoother top end?), practically identical output, improved design and most likely lower price than the 464.
