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Re: Bottoming-out revisited

Subject: Re: Bottoming-out revisited
From: Rob Danielson <>
Date: Sat, 21 Jan 2006 21:16:15 -0600
At 11:36 PM +0000 1/21/06, John Hartog wrote:
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>I then switched the NT1-As to the PMD-670 and it did not work well at
>all.  I didn't have time to remove the panel and switch on the
>high-pass or the mic attenuator or otherwise mess around with
>settings, but at least I know it's not from the mics physically
>shaking from the ground rumbling as I had originally suspected from
>previous occurrences of the problem. Here's a snapshot of the
>distorted waveform:
>http://www.rockscallop.org/test/670distort.JPG

Hi John--
I believe there is discussion on Oade Bros forum about limited
headroom on the 670 mic pre.

>
>Next I tried the rh-10 with the Shure 183s shoulder mounted, and that
>combination also created horrible distortion no matter what the gain
>setting or the mice sensitivity setting. Though the problem cleared up
>when I left the booming roar of the cave.

Seems similar to what has been reported several times. Cause is still
unexplained to best of my knowledge. Several folks have reported it
does not seem to happen with sharp MD's. So maybe use your Sharp when
its loud?

>
>And finaly, I tried the rh-10 with the ms-907, set up exactly the same
>as previously with the mz-n707.  I sounded fine for about two seconds,
>and then distortion set in.

This happening with another PIP mic on HiMD could be consistent with
Curt's theory that  something is going on with high level in using
PIP power on the HiMD mics pre.  I have not gotten bottoming out with
HiMD using the Rolls- just as you experienced. Rob D.


>Of course as usual, more investigation is due, and all
>comments are welcome.
>
>-John Hartog
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>"Microphones are not ears,
>Loudspeakers are not birds,
>A listening room is not nature."
>Klas Strandberg
>Yahoo! Groups Links
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--
Rob Danielson
Film Department
University of Wisconsin-Milwaukee


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