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Re: PBB2N Plans

Subject: Re: PBB2N Plans
From: "Paul Jacobson" thebrunswicktwitcher
Date: Tue Nov 16, 2010 1:22 pm ((PST))
On 17/11/2010, at 7:21 AM, Rick Munday wrote:

>> The 10mm capsules will help
>> off set this as they have better high frequency response to bring out
>> more treble in the center of the stereo field compared to larger
>> diameter flush-mounted mics like AT4022's. Who knows, you may like
>> your mistake better than Crown specs-- a perk of experimentation.
>

The 10mm capsules have about 2dB less roll off from 4khz to 6khz compared w=
ith the MKH20 w/diffuse eq.  Above 8khz there the MKH20w/diffuse eq actuall=
y has better HF performance than the MiniPIP in a SASS-like rig. The MiniPI=
P's used in Vicki's tests also have a HF boost from 7khz peaking at +3dB at=
 15khz compared with the stock EM172's.

The key advantage of the smaller capsules is that they don't become signifi=
cantly directional with rising frequency. Comparing mics in free air the MK=
H20 starts to become noticeably directional at 4khz while the MiniPIPs do n=
ot display a similar degree of directivity until 10khz+.  It would seem tha=
t better perceived HF performance of the smaller capsules is related to the=
 fact that they collecting HF information over a wider spread than the larg=
er capsules.


cheers
Paul





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