These are the two different grids that came with the 4006s
DD0251 Free-field Grid, Silver

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.


DD0297 Diffuse-field Grid, Black

The DD0297 is a microphone protection grid ideally suited for making all types of far-field recording
It is supplied as standard with the Standard Microphone Types 4003 and 4006, the A-B Stereo Kits 3503 and 3506 and the Compact Microphone Types 4051, 4052 and 4053, but can also be ordered separately. With this grid fitted, your microphone will achieve a linear diffuse-field response up to 15 kHz.
In the near-field, the on-axis response has a 6 dB boost at 15 kHz. At intermediate distances, you can orient your microphone at a "grazing angle" of incidence to the sound source to give a normal response to direct sound while brightening up reflective sound.


and was thinking about getting the cone to round out the set but not sure what I would use them for. I guess aiming them up while inside the middle of a string band perhaps.
UA0777 Nose Cone

The Nose Cone UA0777 is specially designed for use with the Standard Microphones 4003 and 4006, the A-B Stereo Kits 3503 and 3506 and the Compact Microphones Types 4051, 4052 and 4053.
It will give your microphone a perfect omnidirectional response across the whole audio frequency range. It counteracts the directional characteristics that omnidirectional microphones exhibit at higher frequencies, and guarantees an even tonal balance of sound arriving at all angles of incidence, but with a high-frequency boost on-axis.
This nose cone is especially suitable for increasing the ambiance to your recordings, or for miking a variety of sound sources that are positioned around the microphone.

