DPA 4041-SP Посібник користувача - Сторінка 3

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The preamplifiers

The microphone preamplifiers Type MMP4000-S and MMP4000-T

are part of the modular microphone system to be used with the

Modular Microphone Cartridge Type MMC4041. Both microphone

preamplifiers are supplied with 130V via the HMA4000 microphone

a mp l i fi e r, enabling them to handle all high level outputs from t h e

m i c rophone capsule without adding any dist o rtion to the signal.

Please see full specifications for how the choice of preamplifier will

influence the specifications of the complete microphone.

The tube preamp l i fier MMP4000-T off e rs a slight musical 2nd

harmonic distortion colouration and uses a pentode vacuum tube

driven as a cathode follower in a transformerless class A unity gain

output st a ge. The special quality sub-miniature vacuum tube is

'heated via 6,3V supplied by the HMA4000 Hi-Voltage Microphone

Amplifier.

For supreme transparency, the MMP4000-S solid-state preamplifier

design is identical to the discrete transistor output stage used in

the DPA range of hi-voltage microphones. Like the output s tage of

the tube preamplifier, the transistor output stage is driven as a class

A unity gain impedance converter.

Designed for use in common pro audio environments where 48V

phantom power is a defined s tandard, the 4041-SP does not require

the HMA4000 hi-vo l ta ge amp l i fi e r. But due to the limited vo l ta ge

supplied to the preamp, 10 dB less SPL handling is the price of th e

48V choice. The preamp l i fier is transformerless in its design.

All microphones are supplied with an individual calibration chart stat-

ing the self-noise, sensitivity and the individual frequency response.