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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: "thxdave" thxdave
Date: Fri Jan 22, 2010 8:27 am ((PST))
Dan, can you help me with this....where is the capsule on my MKH60 shotgun? I 
have it in an M/S rig with my MKH30 and the capsule on the '30 is easy to see 
but not so the '60.

dave
www.heritagefilm.net
www.morrisonphotographics.com

--- In  Dan Dugan <> 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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