"Dave Plowman (News)" wrote:

In article ,
Matti Adolfsen wrote:
To get the best possible noise figure from a mic preamp, you must match
the amp input impedance to the microphone. This is 600 ohms in most
cases. but:

Could you name a modern mic with an actual 600 ohm (balanced) output
impedance?

Or indeed any?

Loads of the inexpensive but half decent Asian mics are genuinely 600 ohms.

Graham