Hi Rob,
Thanks for taking the time to write and research such a wonderfully
detailed post!!
> The imaging performance of the reverse wedge design is quite
> surprising isn't it? Here's a photo of your rig compared to one I
> recently took of Curt's:
> http://ad2004.hku.nl/naturesound/RobD/Olson-Jacobsen-SetBacks.jpg
> Could the set-back distance on your rig be a tad greater than Curt's?
> When a group of students and I studied this variable, we found that
> localization stood up quite well with parallel barriers even when the
> capsules were only set-back 1/2" (12.5mm) from the leading edges.
> Some of us felt that localization was slightly better and the depth a
> bit more uniform with the shorter set-back. I'd be tempted to try a
> shorter set-back and the barriers a little less angled-out. This
> might produce a tad more brilliance from front-center and perhaps a
> little less front-back confusion. Its hard for me to judge without
> the knowledge of where things were in the setting but I think you can
> get a little better localization around center with some adjusting.
I'd worked off Curt's photos to get an idea of positioning. In the
pics of my rig the capsule was 2.5" back from the LE of the barrier.
I've moved the mics as far forward as possible without shifting the
clips, so they are now 1.5" back from the LE. I'll move the clips
forward during the week, so I have a reasonable range of adjustment
to play with.
>> Could the left mic could be a tad
> hotter under 100Hz? If so, this might also even-out with the low Hz
> cut filters off. Rob D.
The mics are quite unbalanced to the point that I will to pick up
another AT3032 in the next few weeks to try and get closer matched pair.
One of my mics seems to be a fairly early model - it doesn't have the
"CE" logo on the body and the PCB is marked with a part number,
whereas the newer mic has the "CE" logo printed on the body, and the
PCB is marked "Pb Free" but doesn't carry a part number.
In some basic tests I did with gain on the HDP2 set the same for both
L and R I had to boost the gain for the newer at3032 by 3dB to match
the older mic. The frequency response seems to be slightly different
between the two mics.
cheers
Paul
"While a picture is worth a thousand words, a
sound is worth a thousand pictures." R. Murray Schafer via Bernie Krause
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