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T E C H N I CAL D ESC RIPT I O N

The cartridge

Directional microphones Type 4011, 4012, 4015 and 4016 use a

19mm diameter prepolarized pressure gradient condenser- m i c ro-

phone car t r i d ge. Type 4011 and 4012 offer a f i rst order cardioid

pick-up pattern, the Type 4015 and 4016 offer a wide cardioid pat-

t e rn (see Fig. 1 & 2). The diaphragm is highly resistant to the most

a g gr e s s i ve kinds of humidity. The large spacing between th e

diaphragm and the back plate in this cart r i d ge makes the micro-

phone highly insensitive to temperature influence and allow s

greater SPL handling before clipping occurs.

Type 4011 and 4012 are designed to have a linear on-axis response

from 40Hz to 20kHz (±2dB) measured at 30cm (see Fig. 3). Type

4015 and 4016 are designed to have a linear on-axis response from

40Hz (±2dB) to 20kHz (+3/-1dB) measured at 60cm (see Fig. 4) and

are furthermore intentionally calibrated with a slight high-frequency

soft boost.

Great attention has also been paid to the microphone's off-axis

p e rf o rmance during the design process (see Fig. 3 & 4).

The diaphragm is protected from dust by an acoustically transparent

net behind the front protection grid and inside the back port of the

cartridge. For optimum s tability the microphone cartridge has

undergone a special pre-aging process, which s tabilizes all tensions

in the materials as well as the polarization voltage.

The preamplifiers

Types 4011 , 4012, 4015 and 4016 use the same high quality pres -

sure gradient capsule, but differ in their polar patterns and preampli-

fier powering systems. The 4011 and 4015 are 48V phantom pow-

ered, whereas the 4012 and 4016 are powered with 130V via the

DPA Type HMA4000 High-Voltage Microphone Amplifier.

The 401 1 and 4015 are powered via a s tandard P48 system and are

equipped with standard 3-pin XLR-connector (see Fig. 5 for pin

designation). They feature a 20 dB attenuator push-switch built into

the connector (see Fig. 6). When the button is pushed in, the output

is attenuated 20 dB. The attenuation allows the microphones to be

used for close-miking high SPL sound sources without overloading

the console input amplifier from the output of the microphone.