So here are the results from the comparative tests I did last weekend
with the Rolls PB224 phantom power supply. What did I find? That
outdoors is not the place to get meaningful results, and it is likely
impossible to compare the noise from the equipment used in this
experiment because the wind, slight as it was, adds too much
inconsistency. But have a listen, maybe there is something of worth
to be taken from my efforts. Here are two of the same recording =96 one
wav (10.8MB) and one mp3 (0.96MB:
http://www.rockscallop.org/test/jh-050925-rollstest.wav
http://www.rockscallop.org/test/jh-050925-rollstest.mp3
The recording consists of six 10 second snips from my six test
recordings. I used a ticking clock, kind of like Rob does in his
tests. I taped the clock to a small alder tree, kind of like I
imagine Rob might not do. For the first three recordings, the clock
is about eight feet away and somewhat to the left of the microphones.
In the second three, the clock is about three feet directly in front.
All the recordings were made with recorder settings at full gain.
The equipment used follows this order:
1. Rode NT1-A's > Rolls PB224 > Sony MZ-N707
2. NT1-A's > PB224 > Marantz PMD670
3. NT1-A's > PMD670
4. NT1-A's > PMD670
5. NT1-A's > PB224 > PMD670
6. NT1-A's > PB224 > MZ-N707
Your questions and comments are welcome.
-John Hartog
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