Yesterday was made the 1st Pleiades high cut microphone filter inside an XLR adaptor.
The idea was :
to compensate for increased high freequency content due to mic proximity (obstacle effect)
to compensate for Fletcher Manson and voice effort curves
It consisted of only one 220 nanofarad capacitor in parallel with mic output.
Theoretical cutoff 3.5KHz assuming 200ohms Zo of microphone.
Is this still 6db per octave or does it make a reasonant circuit with the Pleiades low cut inductor filter in parallel too?
When it was connected any unnatural hiss left was almost extinct and it was found more desirable to further cut bass for balance. Values up to 25mH were used, (1.27kHz). At an output stage it would round off peaks of instantaneous limiting!
Signal path:
MD421 - Pleiades high cut - Pleiades low cut - Canford input transformer - EF183 with positive bias
Sound had quality of Say Something - Brave New World, Anguilera
The idea was :
to compensate for increased high freequency content due to mic proximity (obstacle effect)
to compensate for Fletcher Manson and voice effort curves
It consisted of only one 220 nanofarad capacitor in parallel with mic output.
Theoretical cutoff 3.5KHz assuming 200ohms Zo of microphone.
Is this still 6db per octave or does it make a reasonant circuit with the Pleiades low cut inductor filter in parallel too?
When it was connected any unnatural hiss left was almost extinct and it was found more desirable to further cut bass for balance. Values up to 25mH were used, (1.27kHz). At an output stage it would round off peaks of instantaneous limiting!
Signal path:
MD421 - Pleiades high cut - Pleiades low cut - Canford input transformer - EF183 with positive bias
Sound had quality of Say Something - Brave New World, Anguilera
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