Ey Derek,
Got the same with piezo's homemade stuff. Havent checke with other
unbalanced mikes and im off to india now. Btw, join
www.sounddevicessupport.com lots and lots of 7-series users there!
Anton
> -----Oorspronkelijk bericht-----
> Van:
> Namens Derek Holzer
> Verzonden: Thursday, July 06, 2006 6:42 AM
> Aan:
> Onderwerp: Re: [Nature Recordists] unbalanced inputs to the 722
>
> Yes, I experienced the same thing plugging my piezo contacts
> direct into the 722. However, the Core Sound Binaurals did
> not have the same hiss when plugged into the 722. Of course,
> these two mics provide are quite different, and what was the
> same for me was the electromagnetic interference.
>
> In your case, the signal to noise ratio would improve greatly
> by using some kind of impedance converter such as a DI box.
>
> It's funny, however, because when I plug all the same gear
> into an RME QuadMic preamp, I don't have the unbalanced/high
> impedance problems at all. I wonder if RME has built their
> preamp with some kind of impedance-sensing circuit which
> switches depending on input.
>
> Could other 722 owners with unbalanced/high impedance mics do
> me a favor and plug it all together in a VERY quiet setting,
> turn the gain up to
> +60 or so, hit record and listen for the harddrive writing? It is a
> regular signal occurring about every 10 seconds. Please tell
> me which mic you test with it and what your results are.
>
> best,
> d.
>
> Andrew Skeoch wrote:
> > Hi Derek,
> >
> > This may or may not relate to a specific problem I've
> noticed with my
> > 722. I have tried a Sony single-point stereo mic, an ECM959
> with 6.5mm
> > jacks, and found plugging it directly into the 722 (no phantom, and
> > using a pair of 6.5 to XLR converters) results in a
> significant grainy
> > hiss. Using a mic preamp (6.5 to XLR converts on pre input,
> XLRs pre
> > to 722) eliminates the hiss and the mic then has a smooth,
> fine-grain
> > noise floor. I wonder whether this additional grainy hiss
> is a result
> > of either a high impedance mic or unbalanced input?
>
>
> --
> derek holzer ::: http://www.umatic.nl
> ---Oblique Strategy # 177:
> "What is the reality of the situation?"
>
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