The PH-3223 is a medium format horn that features a 90 degree horizontal by 55 degree vertical radiation pattern. This makes the horn ideal for short throw applications where wide dispersion is specified.The PH- 3223 has a large diameter 2 inch ( 50 mm) throat diameter designed to accommodate several P Audio PreNeo and BMD series professional compression drivers. The large diameter throat is excellent for mid band reproduction, particularly through the upper vocal range. The large horn mouth dimensions of 12.71 inches (323mm) by 9.21 inches (233mm) provide good pattern control and acoustic loading tobelow1000Hz. Large throat diameter horns are well suited for mid band applications. The PH-3223 is constructed of high impact ABS with additional glass filling for additional structural support and rigidity. The PH-3223 may be used with the following P.audio professional compression drivers. (or any industry standard compatible driver ) - BM-D750 - PreNeo-750N