Re: [LAU] Portable Digital Recorders

On 1 February 2010 at 21:00, =?ISO-8859-1?Q?J=F6rn_Nettingsmeier?= <nettings@email-addr-hidden-hochschule.de> wrote:

> but check out the EIN column:
>
> > POCKET DIMENSIONS VOL MASS PRICE XLR MIC EIN
> > ------------------- -------------- ---- ---- ----- --- --- ---
> > Sony MZ-RH1 85 x 84 x 15 107 106 $ 350 - - 124
> > Olympus LS-10 132 x 48 x 22 139 165 $ 300 - + 122
> > Olympus LS-11 132 x 48 x 22 139 165 $ 400 - + 122
> > Sony PCM-M10 114 x 64 x 22 161 187 $ 300 - + 122
> > Marantz PMD620 102 x 62 x 25 164 170 $ 400 - - 112
> > M-Audio MicroTrack II 109 x 63 x 28 174 192 $ 200 - - 106
> > Korg MR-1 120 x 64 x 24 184 200 $ 500 - - 117
> > Edirol R-09HR 113 x 62 x 27 186 166 $ 300 - + 118
>
[snip]
>
> if that means what i think it means (equivalent input noise), and i'm
> not totally out of touch with the state of preamp technology, i'd say
> all but the 106, the 99 and the ? are bogus. and i'm not even sure about
> the 106 :)
> i wonder who makes these figures up? or is there a legal way to doctor
> the measurements to actually yield such values without being sued?

Could it be that EIN refers only to theoretical quantization noise of
the units? I didn't run that calc.

I'm also suspicious ~120dB equivalent input noise, presuming the sign
of that number is negative. Well, with either sign the number seems
fictitious.

--
Kevin
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