DPA 4003 Panduan Pengguna - Halaman 6

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User's Manual

Technical Description

Acoustic Pressure Equalizers

Available as optional acoustical attachments are also the APE's – Acoustic

Pressure Equalizers. The APE's use diffraction to passively modify the sound

field near the microphone diaphragm, thus changing the microphone's

frequency response and, in particular, the polar response (see Fig. 11 and Fig.

12) without adding any electrical noise to the recording. The size and shape

of the APE determines the acoustical changes of the microphone. The APE's

are precision made from a special compact nylon material and will only fit

the Types 4003 and 4006 fitted with the standard Nearfield Grid DD0251.

There are four different APE's in the range: L30B is a Ø30mm ball-shaped

APE marked with a blue dot, L40B is a Ø40mm ball-shaped APE marked with

a green dot, L50B is a Ø50 mm ball-shaped APE marked with a red dot and

the L110C is a cylinder-shaped APE, 110mm long and marked with a yellow

dot. The APE's can be obtained as single units or in two different equalizer

kits: APE L4 contains 4 different APE's and APE L8 contains 2x4 different

APE's. See Fig. 14 for how to mount the APE's on the microphones.

The Passive Connection Converter

The PCC4000 Passive Connection Converter is an optional accessory that

makes it possible to run High-Voltage Microphones on standard 48 V

phantom power with reduced microphone specs. The maximum reduction of

the microphone SPL handling capability will be 13dB and it is possible to

drive up to 100m of cable with the PCC4000 with the same specifications.

Like the High-Voltage Microphones the PCC4000 is transformerless. The

input connector is a modified 4-pin female XLR for connection directly to

the microphone. The output is a standard 3-pin male XLR-connector for

connection to standard cables.