Thursday, October 25, 2018

Mic input impedance of some preamplifiers


Measured by the Escort ELC-120 LCR meter which sends a 1.28KHz signal.


Sony TC-D5 Pro
4.5KΩ


Realistic 32-1101A Disco Mixer mono mic in
11KΩ


(This does not mean that we need to connect mics of 4-10KΩ impedance. So far for example Sony sounds best directly connected with mics of the order of 600Ω-800Ω output impedance. A mic transformer stepped up at 2KΩ has been tried yet on Pleiades experiments).

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