[Top] [All Lists]

Re: unbalanced inputs to the 722

Subject: Re: unbalanced inputs to the 722
From: "Anton Woldhek" getvergetver2
Date: Thu Jul 6, 2006 3:07 am (PDT)
Ey Derek,

Got the same with piezo's homemade stuff. Havent checke with other
unbalanced mikes and im off to india now. Btw, join lots and lots of 7-series users there!


> -----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 :::
> ---Oblique Strategy # 177:
> "What is the reality of the situation?"
> ------------------------ Yahoo! Groups Sponsor 
> --------------------~--> 
> See what's inside the new Yahoo! Groups email.
> --------------------------------------------------------------
> ------~-> 
> "Microphones are not ears,
> Loudspeakers are not birds,
> A listening room is not nature."
> Klas Strandberg 
> Yahoo! Groups Links

<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the naturerecordists mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU