Hello--Is the diffuse-field-equalized pressure capsule of the KM 130 exactly the same as the one in the KM 83? The on-axis frequency response curves certainly look the same to me; I wouldn't get any impression from them that the capsule had been made to sound brighter, as it was in the parallel transition from KM 84 to KM 140.

(I used the KM 83 rather often during the mid-1970s, and would be rather surprised if there were much demand for an even brighter-sounding omni than it already was.)

--best regards