[Igor (t4a)]

On 25 Okt., 16:03, "Richard Crowley" wrote:
"Igor (t4a)" wrote ...

My point was, if the noise stems from acoustic origins than the Shure
should have picked it up _louder_. Appearantly this was not the case.

But you are also making the assumption that both mics
have the same directional coverage/sensitivity. I believe this
is not the case.

It is not the case. However, ambient noise usually does not show a
strong angle gradient. And after all the mics did point in the same
direction. I can point the mikes in different directions and I would
not expect different readings. I mean, I can hear the blood running in
my ears when it is reasonably quiet. Do I need a microphone to tell me
that it is quiet? ;-)

Remember that there more factors than you are isolating
with your home experiments. The combination of the RE20
and your home-made preamp and your recording space may
just not be up to your desired standards.

True. But what noise floor improvements do we discuss here? 6 dB, 10
dB, 20 dB, 30 dB?

For example, what
is the noise floor in your recording chain if you substitute a
load resistor for your home-made preamp? etc. etc.

Hm, can you please rephrase the question. :-)

Best wishes,
Igor