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Vale81

MKH 40 - 50 sensitivity differences

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Hello guys, I'm new here, nice to meet you, I'm Valerio.
A question for those who own a MKH50 and a MKH40. I've compared these two mikes , side by side,  same gain on recorder, 15cm to my mouth, on axis.
On paper they have the same sens (25mV/Pa) , but the 50 has less , -3-4db respect to 40 (not negligible imho). The noise floor is identical.
Did you ever notice the same difference?   
Something could be wrong on this 50 , or it is just the wider polar pattern of the 40 that catches more sound pressure?
Thanks!

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Don't have the two mics to compare, but I'd run a second test, 15cm to mouth is pretty close.

maybe put a sine wave on a speaker and set up the mics at 1-2m distance and see if the difference persists. 

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