The Hakan P110 Pop Killer from Swedish microphone specialist mikrofonen.se is a very special pop filter that is specifically designed to effectively prevent plosives (pops) and, at the same time, to eliminate the audible coloration that other pop filters often display.
It is extremely effective in killing pops without compromising the frequency response and character of the microphone.
The foam used in the P110 was carefully researched to maximize pop protection and minimize coloration - the specially selected foam is "hydrophobic" – this means that it will not absorb water. So moisture from the breath will not be absorbed by the foam and therefore does not stay on the filter to distort and color the sound. The foam disk is easily washed in ordinary detergent for improved hygiene and, because it is hydrophobic, dries very quickly. In addition, the wire holder for the foam is invisible to audio and does not have diffraction effects that could occur with a large supporting frame.
Most pop filters are known to color the sound. Measurements made by mikrofonen.se in Sweden have proved this. The coloration is clearly audible (red curve on the graph). With the Hakan P110 Pop Killer (blue curve) there is no coloration.