The RTA420 microphone is "pin 3 hot"; what does that mean?


The RTA 420 is "pin 3 hot"; what does that mean?

The Rational Acoustics RTA 420 microphone (listed on our store here) is Pin 3 hot. This means that the polarity of the microphone is reversed compared to other microphone standards.

If you are using a single microphone, this should not cause any differences in your measurement.

However, if you will be comparing a microphone that is not pin 3 hot to the RTA 420, this is something to be aware of and you will need to make adjustments accordingly. 

For more technical details, refer to the following article:

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