aard
Date: Tue Jan 9, 2007 3:29 pm ((PST))
TLM103 to Art2 to mic input (red) on RH1=3Dnoisy (mostly high frequency noi=
se as far I can
tell)
TLM103 to Art2 to mic pre on Motu 828mk2 and out line level on the back int=
o line/
optical on RH1 (white)=3DLow noise
The Motu looks like this: http://www.motu.com/products/motuaudio/828.Its pr=
eamps are
decent but not the best.
*S*
--- In Rob Danielson <> wrote:
>
> At 7:24 PM +0000 1/9/07, sveinung_nygaard wrote:
> >The RH1 is on batteri, the Art2 is running off battery, the 828 is
> >on mains. The miccable is
> >good, I use it all the time. The mic is fine too. I am running a
> >longish unbalanced cable
> >from the outputs of the 828, so that might cause some noise. The
> >funny things is when I
> >used the preamp
>
> What preamp? The art II is a phantom power supply. The output from it
> goes to a mic level input.
>
>
> >on the 828 with all the same cables attacheds it was like I was able to
> >breath again (almost no noise). And, this noise I have problem with
> >is the same as the one
> >I get when plugging a Sony ECM-MS907 into the RZ1 but not having
> >turned the mic on.
> >This is what suggests to me that the preamp has some noise in it. I
> >also get the same
> >noise plugging an ordinary cable into the preamp input.
>
> There are line and mic inputs on the Hi-MD. The Art II output goes to
> the (red jack?) mic input on the Hi-MD. Rob D.
>
> >
> >*S*
> >
> >--- In "stoatwizard" <linnet@> wrote:
> >>
> >> This sounds like there is a fault. Neumann quote the sensitivity at a
> >> decent 23mV/Pa and a self-noise of 7dBA, so the RH1 preamp noise cost=
s
> >> you about 2dB self-noise.
> >>
> >> When I had one on loan to test the noise floor of the RH1 driven by a
> >> 180R resistive load had a slight hint of hum, which I suspect to bein=
g
> >> due to the OLED display which has a 100Hz refresh rate.
> >>
> >> One question - are you battery powering the phantom unit (ie there
> >> isn't an earth loop with the phantom powering), since the RH! is not =
a
> >> balanced input, so the phantom unit and mics should be fully floating
> >> if possible?
> >>
> >> --- In "sveinung_nygaard"
> >> <sveinung.s.nygaard@> wrote:
> >>
> >> > I might be mistaken, but it seems to me that the mic pre on the Son=
y
> >> MZ-RH1 is very noise. If
> >> > anybody cold lead me on the right track I would be very thankful. I
> >> have one of these
> >> > recorders, and I tried comparing it to the preamp on my MOTU 828 mk=
2,
> >> and the mic pre on
> >> > the sony recorder has a lot of high frequency noice on it. I used a
> >> Neuman TLM103 with
> >> > phantom from a ART2 box. It was all done indoor to check the
> >> noiselevel (very crudely!). But
> >>
> >
> >
> >
> >
> >"Microphones are not ears,
> >Loudspeakers are not birds,
> >A listening room is not nature."
> >Klas Strandberg
> >Yahoo! Groups Links
> >
> >
> >
>
>
> --
> Rob Danielson
> Peck School of the Arts
> University of Wisconsin-Milwaukee
> http://www.uwm.edu/~type/audio-art-tech-gallery/
>
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