Earthworks Drum Periscope
™
Microphones
The Earthworks DrumKit™ High Definition Three-Microphone Systems have
had great success because they pick up drum sounds with far more detail and accu-
racy than conventional microphones. This improved sound quality is due to propri-
etary advanced technologies utilized in Earthworks High Definition Microphones.
Many famous drummers were using Earthworks High Definition Micro-
phones™ for overheads and kickdrum with exceptional results. They then
wanted the same exceptional sound quality from their snare and tom mics.
With the introduction of the DP30/C Drum Periscope Microphones™, they
were able to get the same pristine, detailed sound from their toms and snares as
they were from their Earthworks High Definition drum overhead mics.
We worked with major artists for nearly two years developing and field testing
our new DP30/C on snare and toms. During the development phase, we miked
a set of drums with nine Earthworks High Definition Microphones (including
our new DP30/C tom and snare mics) and also nine industry favored mics.
When veteran engineers heard the difference between these two recordings,
they made the comment that the improvement was so dramatic, it didn’t even
sound like the same set of drums. They all agreed, “the increase in detail and
sound quality was staggering.”
The DP30/C, designed specifically for snare and toms, and has a low fre-
quency response of 30Hz. The 30Hz low frequency response is ideal for toms
and will provide a deep, rich full sound. But it is suggested the you attenuate
this low end response for use with snares. A low-cut (high-pass) filter should
be set somewhere between 50 to 100Hz for optimum results. The DP30/C has
a flexible mini-gooseneck and can handle up to 145 dB SPL. The Earthworks
patented polar technology provides excellent rear rejection and a uniformity
of frequency response out to 90 degrees off-axis. This vastly reduces phase
cancellation or other phasing issues, and minimizes cymbal leakage as well
as acoustic feedback problems in “live sound” applications.
Earthworks High Definition Microphones
™
the New Science in Microphones
David Blackmer, the brilliant engineer who invented the unique technolo-
gies of dbx, is also the inventor and founder of Earthworks. In the last few
years of his life, David developed a number of revolutionary technologies
that dramatically improve the quality and performance of microphones. In
short, Earthworks High Definition Microphones™ will pick up sounds and
detail that other microphones cannot. These dramatic improvements are in
5
The 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. In addition, you can change the angle of the microphone head for your
desired results. Figure 6-A shows how the microphone head can be rotated
while Figure 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.
Figure 6-A and 6-B Positioning the Microphone Head
Plug in the LevelPad, if necessary
In close miking drums, one should keep in mind that the peak sound level at
the microphone head is extremely loud. Microphones used for close miking
drums should have a sound pressure handling capability of at least 140dB
SPL with no audible distortion. The DP30/C microphones will handle up to
145dB SPL without distortion. However, as mentioned earlier, with this kind
of high sound pressure level, it is possible for the microphone output to be as
much as +24dBV which may overload some microphone preamplifiers. The
use of the Earthworks LevelPad™ in the microphone line will prevent any
such distortion or overload. So, to be safe, we suggest that you first plug a
LevelPad into the mic line feeding the DP30/C microphone. For full informa-
tion refer to pages 3 and 4 of this manual.
Close Miking Snare Drums with the DP30/C
As previously mentioned, when close miking drums with a DP30/C microphone,
never position the microphone head parallel to the drumhead. Always position
the microphone head at an angle to the drumhead. It is also suggested that the
microphone head be positioned between 1.5 inches and 3 inches above the drum-
head.
10
A.
B.
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