Primo suggests the EM258 as a possible replacement for the Panasonic WM-61A.
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Primo EM258 6mm Omni Electret Capsule
Primo suggests the EM258 as a possible replacement for the Panasonic WM-61A.
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They are different capsules with different specifications as summarised in the table below, the figures are from the respective manufacturers specifications.
Comparison table for the Primo Microphones
Please note the EM258 is not suitable for the "Linkwitz modification".
Sensitivity: EM258 -32±3dB WM61A -34±4dB
S/N Ratio: EM258 74dB WM61A 62dB
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