Actually, the wiring should be that:
Make sure that nothing is connected to Pin1 of minirator.
Le 24/01/2025 à 03:52, kandoit7 via
groups.io a écrit?:
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Dear
Jerry,
?
Hello.
In the meantime, my answer was late because I was preparing
for the experimental environment.
?
I
made it with reference to the circuit diagram you gave me. I
just changed the resistance of R1 and R2 to potentiometer.
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Generator?
? : NTi Audio MR-PRO
Microphone
: Earthworks M23R
Preamp?
? ? ?: RME OctaMIC II
Analyzer?
? ? : NTi Audio Fx100
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A
value measured without a resistance connection.
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?
It
is a value that is later reduced by 6 dB.
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At this point, the value of the resistance is
R1 : 69.5 Ohm
R2 : 66.8 Ohm .
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The specific of the M23R provided on the homepage is 65Ω
balanced (between pins 2 & 3).
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I think there is an error in the result value, but is it
normal that the values of R1 and R2 are originally similar?
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And it seems that M23R product is not balanced. When M23R
is connected directly to MR-PRO, the R value for pin 2 is:86
Ohm, and the R value for pin 3 is:260 Ohm. For normal balanced
microphone, the resistance values for pin 2 and pin 3 are the
same.
Even in this situation, I wonder if the above measurement
method can be applied.
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I would like to know your thoughts based on this result.
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I'm currently looking for a reliable microphone to measure
other microphones.
I'll show you the results as soon as it goes.
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Thank you.
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I'm late to say hello, but happy new year.
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Best Regards,
Kandoit7
