Earthworks DP30C, User Manual

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the drumhead, but should always be at “an angle” to the drumhead. This will 
prevent any possibility of the diaphragm being forced to the microphone back 
plate which could cause an unwanted pop or thump in the sound or recording 
system.  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.  You can also change the angle of the microphone head as shown 
in Figure 6-A and 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.

A.

B.

A.

B.

Figure 5-A and 5-B  Adjusting DP Microphone Height

Figure 6-A and 6-B  

Positioning the 

Microphone Head

live sound will 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 the RimMount. Then 

push the body of the microphone from the bottom (XLR connector end) to 

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