The P Audio PH-220 is a fully rotatable, medium format high frequency horn. Because the horn mouth is square, the horn may be rotated to optimize coverage based on the acoustic environment. The radiation pattern is a nominal 90 degree by 75 degree. The square horn mouth allows the pattern to be either a 90 degree horizontal by 75 degree vertical coverage pattern or a 75 degree horizontal by 90 degree vertical pattern. The mouth area is large enough to provide excellent acoustic loading to below 1000Hz.