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Re: [gear] Zoom H2 self-noise estimate

Subject: Re: [gear] Zoom H2 self-noise estimate
From: "Rob Danielson" danielson_rob
Date: Sun Sep 9, 2007 3:27 pm ((PDT))
At 2:12 PM +0000 9/9/07, oryoki2000 wrote:
>Rob Danielson wrote:
>>  Could those numbers could be misleading?
>I guess I should stick to my "pretty good but not great" assessment of
>the H2 preamp, which is what you might expect at this price point.
>The original poster states that the H2's noise floor is similar to his
>DAT recorder.

The H2's mic pre's noise bed could very well be in that ballpark. I'm 
just observing that it would be something if the self-noise of H2's 
built-in mics' was that low. I assume one could use a portable 
phantom power supply with its PIP mic input. Has hooked-up some low 
noise mics to an H2?

>  Raimund Specht's test of a Sony DAT, made with
>different methods, puts that at about -115 dB.


>There has been speculation in other forums that the H2 controls gain
>digitally, that is, after the analog to digital conversion.  Values
>below 100 in the H2's gain setting may be the result of digital
>reduction of the input, and values above 100 mean the signal is raised
>digitally.  This might explain why the noise level goes up markedly
when the gain is set above 100.

It certainly wouldn't surprise anyone to find a compromised mic pre; 
but you never know until its field tested.  Rob D.



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