> I had not realized that the EM172 capsules have such a high impedance =
> (2.4k ohms), higher than the mic input on the LS-11.
>
> I did a quick experiment running the EM172s through my ART preamp,
> which has an input impedance rating of 300k ohms, and I do not hear
> any difference compared to the LS-11 which is rated at 2k ohms.
Hi Jon,
If you don't hear a difference between the two setups, then the EIN of the =
LS-11 is obviously still low enough for properly processing the reduced out=
put signal level of the microphone.
The drop of the output signal voltage is however a matter of fact that can =
be easily derived from ohms law. Further details on this issue can also be =
found for instance at rane.com:
http://www.rane.com/note124.html
> Is there an ideal amount by which the microphone output impedance
> should be lowered compared to the preamp input, and is there a
> standard method for doing this?
I agree whith Dan that a factor of at least 10 would be ideal.
Regards,
Raimund
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