User Manual

Instrument Reexion Filter Technical Manual
Using Your Instrument Reexion Filter
A spring-loaded plunger in the side of the central tube is
used to secure stick-type microphones and a good starting
position is to get the microphone capsule roughly level
with the front edge of the lter. The easy was to do this is
to put the IRF face down on a table, adjust the microphone
position by pulling the spring plunger to release the
microphone, then lower it so that the microphone capsule
end is also touching the table. If the microphone is placed
further into the IRF, you may get slightly better sound
isolation but at the expense of a small amount of tonal
coloration. If on the other hand you have the microphone
protruding further than necessary, the amount of sound
isolation will be reduced.
In situations where you wish to use
a side-address microphone, such
as our sE2200A, the central tube
can be plugged using the foam
bung provided. You can still use a
single mic stand to hold both the
microphone and the IRF. Where the
instrument being recorded has a
reective wall or other surface directly
behind it, a further improvement can
be made by improvising a screen
from blankets hung behind the
performer to further reduce the level
of reections entering the front of the
microphone.
In smaller studios, drum recording is often a problem because of the intensity of ceiling and wall
reections, which in the main aect the overhead microphones as these are furthest from the kit. By
setting up an IRF to shield the rear and sides of the overhead mics, the level of these unwanted reections
is signicantly reduced resulting in a cleaner recording. Also keep in mind that adding compression to
your recording later will increase the eect of any room resonances or coloration so the drier you can
make your original recording the better.