The DD0251 is a Free-field Grid ideally suited for making all types of near-field recordings.
It is supplied as standard with the Standard Microphone DPA 4003 and 4006, the A-B Stereo Kits 3503 and 3506 and the Compact Microphone DPA 4051, 4052 and 4053, but can also be ordered separately.
With this grid fitted, your microphones will achieve optimum recording accuracy on-axis and exhibit neutral frequency responses across the audio range from 10 Hz to 20 kHz (±2 dB) close to the sound source.