Earthworks DP30C User Manual - page 7
and it will also provide more gain before feedback as well as a greater control
of the drum mix.
No Phase Cancellation Issues
with Earthworks
™
Microphones
One of the typical disadvantages in the multi-microphone approach, when
using conventional microphones, is interactive microphone phasing problems
that result in the cancellation of certain frequencies. These phasing prob-
lems are a result of the poor polar response of conventional microphones.
Conventional microphones have a drastically different frequency response
between the front and sides of the microphone. It is common for conventional
microphones to have a loss of 10 to 20 dB at high frequencies on the sides of
the microphone. This is why you cannot place three singers on a conventional
microphone, the one in front of the mic sounds great, but the two on the sides
have a dramatic loss of quality. These drastic changes in high frequency
response on the sides of the microphone cause phase differences, which are
the root cause of phase cancellations when using conventional microphones.
In contrast, Earthworks has a patented polar technology that provides our
microphones with virtually the same frequency response on the sides of the
microphone as at the front (no more than a 3dB loss at any frequency out
to 90º off-axis). This extremely uniform frequency response at the front and
sides of the microphone will virtually eliminate any phasing issues when using
Earthworks microphones. In addition, Earthworks cardioid microphones have
a very high rejection of sounds at the rear (back) of the microphone. This
characteristic will greatly reduce the leakage of cymbals or other sounds
at the rear of Earthworks microphones.
Close Miking Toms and Snares with the
DP30/C Drum Periscope Microphones
Inserting the DP30/C Microphone into the RM1 RimMount
The RM1 Rim Mount is designed specifically to house the DP30/C and pro-
vide a mechanism to mount the microphone on the side of a snare or tom.
The RM1 will allow you to mount a DP30/C on either the top or bottom of a
snare or tom.
It is suggested that you insert the DP30/C microphone into the RM1 Rim-
Mount™ prior to attaching the RimMount to the drum.
To insert the DP30/C microphone into the RM1 RimMount™ just place the
mic head and the mini-gooseneck into the rubber holder from the bottom of
6
P
ositioning
the
M
icroPhone
h
ead
O
nce
the
D
rum
P
eriscOPe
micrOPhOne
height
has
been
set
,
yOu
can
POsitiOn
the
mi
-
crOPhOne
heaD
. t
he
micrOPhOne
heaD
shOulD
never
PlaceD
“
Parallel
”
tO
the
Drum
-
heaD
,
but
shOulD
always
be
at
“
an
angle
”
tO
the
DrumheaD
. t
his
will
Prevent
any
POssibility
Of
the
DiaPhragm
being
fOrceD
tO
the
micrOPhOne
backPlate
which
cOulD
cause
an
unwanteD
POP
Or
thumP
in
the
sOunD
Or
recOrDing
system
. t
he
flexible
mini
-
gOOseneck
will
allOw
yOu
tO
mOve
the
micrOPhOne
heaD
either
uP
Or
DOwn
abOve
the
DrumheaD
as
well
as
in
anD
Out
frOm
the
Drum
rim
. y
Ou
can
alsO
change
the
angle
Of
the
micrOPhOne
heaD
as
shOwn
in
f
igure
6-a
anD
f
igure
6-b
shOws
hOw
the
micrOPhOne
heaD
can
be
mOveD
mOre
tOwarD
the
center
Of
the
Drum
by
changing
the
POsitiOning
Of
the
mini
-
gOOseneck
.
9
a.
B.
a.
B.
F
igure
5-A
And
5-B A
djusting
dP M
icroPhone
h
eight
F
igure
6-A
And
6-B P
ositioning
the
M
icroPhone
h
eAd
a.