Re: Is this a good way to test pre-amp hiss of a digital recorder?


Scott Dorsey wrote:

Instead, put a 600 ohm resistor across the input and measure the noise then.
Noise with a mike will be similar (probably lower if the mike output Z is
lower).

A short circuit at the input gives more consistent results when
comparing preamps. While the noise inherent in a 600 or 150 ohm
resistor isn't likely to corrupt your results, different preamps can
have different internal noise with different source resistances. A
short is a short is a short regardless of the input stage
configuration.

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