The Atlas Sound FAP8CXT is a true compression driver premium performance 70.7V / 100V tuned & ported 8" coaxial ceiling speaker system perfectly suited for many business music and public address applications -especially applications where high ceilings require loudspeakers with increased efficiency and tighter pattern control. The FAP8CXT's 90° dispersion angle (in the 2kHz octave band) is perfect for higher ceiling applications where tighter pattern control is required. Tight pattern control (not exceeding 90°) is important for high ceiling applications. Loudspeakers exhibiting wider dispersion than 90° will exceed 6dB of drop off at the edge of the coverage pattern causing excessive SPL variances. Using more of the same wide coverage speaker in a high ceiling application to compensate only worsens the situation as comb filtering from multi-path arrivals will result.