— Speaker Coverage · Point source
K-array Tornado KT2: SPL & coverage at 6 m
Problem. A 20 x 12 m restaurant relying on background music needs the loudspeaker's rated output to translate into usable, even level at the listener's seat, not just at the cabinet face. For the Tornado KT2, a compact passive point-source box rated 100 dB SPL at 1 m, the real question is what level and coverage half-width it actually delivers once distance and drive level are factored in.
Answer. At a 6 m listener distance and 50% drive, the Tornado KT2 delivers roughly 81 dB SPL, comfortably within background-music range for a 20 x 12 m restaurant floor. Its 90 x 90 degree dispersion pattern supports a horizontal coverage half-width of about 6 m at the -6 dB point.
02 / In depth
How this preset reads — the engineering view.
The Tornado KT2 is rated 100 dB SPL at 1 m, but SPL falls off with distance under the inverse-square relationship: at 6 m and full output, level drops to roughly 84 dB, and at 50% drive it settles near 81 dB at the listener position.
Its 90 degree x 90 degree (H x V) dispersion sets the practical horizontal coverage to about 6 m either side of the axis from a single cabinet. The wide, symmetric pattern favours even near-field fill over a compact floor area, which suits background-music use rather than long-throw projection. Being passive, the KT2 needs matched external amplification sized to the room rather than any onboard power stage.
Use the planner by dragging the listener-distance slider and the drive-level control to watch the modelled SPL move in real time. The box-count estimate shown alongside is a front-coverage guide only; SPL adequacy at the listener's seat is a separate feasibility check and should be read on its own terms.
The planner does not model room reverberation or RT60, coverage zoning across multiple areas of a larger venue, subwoofer pairing for low-frequency extension, array mechanical rigging, or DSP and delay-line tuning between multiple cabinets. Treat its output as a first-pass coverage and SPL estimate, not a final acoustic design.
What this preset deliberately does not solve
- Figures assume free-field inverse-square propagation and do not account for room reflections, absorption, or furnishings that alter real-world SPL.
- The 6 m coverage half-width reflects a single cabinet's -6 dB horizontal pattern; multi-speaker zoning and overlap are not modelled here.
- Passive operation means actual output depends on the paired amplifier and cable run; the planner assumes the cabinet is driven within its rated input.
How this preset differs from its siblings
Other point-source options in the catalogue carry different rated SPL, dispersion angles, or active/passive formats, which shift both the coverage half-width and the drive level needed to reach a given listener distance. The Tornado KT2's 90 x 90 degree pattern and 100 dB @1 m rating make it suited to compact, even-fill background zones rather than longer-throw or narrower-pattern applications, which is why its coverage numbers are presented on a dedicated preset rather than folded into a generic point-source example.
02 / What that means, drawn
Plan view, drawn to one scale in both directions. The room is 20.00 m deep by 12.00 m wide, with the cabinet on the front wall and the listener 6.00 m down the axis. K-array Tornado-KT2 has a nominal horizontal pattern of 90°, so the covered shape is a wedge whose apex is at the CABINET, not a circle around the listener. The wedge is drawn at half that angle either side of the axis. At the listener's distance that wedge is 12.00 m across — 6.00 m either side of the axis. That width is the published figure, and it is the only coverage quantity this tool establishes. The room is 12.00 m wide there, which one cabinet covers exactly, with no margin at either wall. The wedge is the nominal beamwidth drawn with straight edges. It is not a measured -6 dB contour, and it is a HORIZONTAL quantity only: no vertical coverage, and no covered area, is claimed here. This cabinet's vertical pattern is 90°, and the difference between the two is exactly why a single circular figure would misstate the covered patch.
03 / Hydrated calculator
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Presets are a typology starting point. The brief wizard captures the room geometry, programme and constraints we need to translate this configuration into a real design.