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Re: M/S: MKH 50/20 with MKH30 combo > How to line up diaphragms ?

Subject: Re: M/S: MKH 50/20 with MKH30 combo > How to line up diaphragms ?
From: "jasonpudd" jasonpudd
Date: Fri Jan 22, 2010 10:48 am ((PST))
Dave,

This is really great info.  I will send this on to the place I get my equipment 
and they can show the Rycote and Sennheiser guys what we are looking for.  I 
don't know why the Rycote rep does not know about these items. 

The Sennheiser rig looks like what was my other option.  There would be not as 
much volume inside the zeppelin with the Sennheiser so the results may not be 
as good as the larger diametre Rycote.  Have you compared the results between 
the Rycote and Sennheiser?

Thanks again!

Jason

--- In  "thxdave" <> wrote:
>
> Here is the mounting rig that one of our alumni put together:
> 
> http://frogrecordist.home.mindspring.com/docs/ms_setups.html
> 
> dave
> www.heritagefilm.net
> www.morrisonphotographics.com
> 
> 
> --- In  "jasonpudd" <jasonpudd@> wrote:
> >
> > I am at the same point trying to put a MKH 30 and MKH 40 in a zeppelin for 
> > wind protection right now.  Rycote has changed their mounting system 
> > recently and now use the new Invision shock mounts instead of using the 
> > older o-ring style shock mounts.  As a result these two mics no longer fit 
> > into a Rycote zeppelin for wind protection according to the local Rycote 
> > rep.
> > 
> > I have sent an e-mail to the Sennheiser rep asking if these two mics will 
> > fit into a MZW20-1 zepp using a MZS20-1 shock mount and a MZD30 Dual Clip 
> > that stacks the two mics on top of each other inside the zepp.  I am still 
> > waiting for a reply.  I will keep you posted with the response I get from 
> > Sennheiser.
> > 
> > If anyone has info concerning this let me know.
> > 
> > Jason Puddifoot  
> > 
> > --- In  Dan Dugan <dan@> wrote:
> > >
> > > >  i am not really sure how exact i should line up the diaphragms. Is 
> > > > there some kind of rule i am supposed to follow or is the kind of thing 
> > > > where you experiment and learn (rule of thumb). 
> > > 
> > > The rule is to get the capsules (inside the mic) as close together as 
> > > possible. Since they're going to be physically separated, they are best 
> > > aligned so that the distance is minimized in the horizontal plane, since 
> > > stereo directivity is a horizontal thing (think left and right speakers). 
> > > So the capsules should be positioned one above the other. That equalizes 
> > > the path distance from sources in the horizontal plane.
> > > 
> > > The closer this is to right, the higher in frequency M/S processing (like 
> > > conversion to left-right) will be accurate. For reference, a 20 KHz wave 
> > > is about half an inch long, meaning a spacing of 1/2 wave, 1/4" will 
> > > produce a null when summed. Put the center point of one diaphragm over 
> > > the center point of the other.
> > > 
> > > -Dan Dugan
> > > 
> > > 
> > > 
> > >
> >
>








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