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I have a question about gain

Subject: I have a question about gain
From: "Russ Wigh"
Date: Sun Sep 24, 2017 6:16 am ((PDT))
Perhaps I should know this, but I don't. I have a Sound
Devices MixPre I bought used a few months ago. The owner's
manual suggests the maximum gain is 66dB.  I assumed the
relationship to the 10 positions on the gain knob was
linear, and that if I set it on position 8 I would have a
maximum input of about 54dB; the human voice.  But when I
was testing my newly reconstructed DIY parabolic reflector
the volume was huge. I had to dial it back to position 5 or
4 and turn down the headphone setting for comfortable
listening.  What am I missing about 'maximum gain'?  The
sound initially reaching my ears was considerably higher
than 66dB - which delights me; it works!



(I am still writing the last of four segments on this
project on my blog, which I will post as a learning trail,
so others can avoid my errors.
<https://recordingbirds.blogspot.com/>
https://recordingbirds.blogspot.com/)



Russ Wigh











"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause.



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