Schoeps B 1 D Hollow Foam Pop Screen for CCM or Colette MicrophonesThe B 1 D is a highly effective popscreen with a deceptively simple outward appearance. As with the B 5 D and the basket type windscreens, the sound inlets of the microphone are enclosed by a volume of air. The B 1 D is most effective in the axial direction; thus schoeps offer it as a popscreen rather than a windscreen. It is designed exclusively for axially addressed capsules such as the MK 4, MK 41 and their CCM counterparts, rather than for the MK