K-array Firenze KH8 SPL & coverage

The Firenze KH8 is rated at 145 dB SPL at 1 m. Because sound pressure falls off with the inverse square of distance, that rating drops well before it reaches the crowd: at 20 m and full output the figure works out to approximately 119 dB, and at a more typical 70% drive level it settles to approximately 117 dB at the listener.

The 120 x 30 degree (H x V) dispersion pattern is what turns raw SPL into usable coverage. The wide 120 degree horizontal spread is what produces the approximately 34.6 m -6 dB coverage radius used in this preset, while the narrow 30 degree vertical pattern keeps energy focused on the audience plane rather than spilling onto the ceiling or rear wall, reducing reflected energy back into the room. The cabinet is self-powered, so the onboard amplification is already accounted for in the rated output figures.

In the planner, drag the listener distance and drive level sliders to watch the SPL figure move in real time against the inverse-square curve. The box-count readout is a front-coverage estimate based on the horizontal dispersion angle and room width; it is a separate calculation from SPL adequacy, so a layout can show enough boxes for width while still falling short on level, or vice versa, and both figures are worth checking together.

The planner does not model room reverberation or RT60, so a live, hard-surfaced hall will feel louder and less intelligible than the flat SPL number suggests. It does not zone coverage across distinct areas of an irregular room, it does not account for subwinter pairing or low-frequency extension, it leaves array mechanical rigging and safe working load out of scope, and it does not perform DSP delay or tuning calculations across multiple hangs.