Lecture auditorium — speech-priority column, 24 x 14 m

Speech in a hard-surfaced lecture room is a dispersion problem before a power problem. A wide point source reaches the back but lights up the ceiling on the way, lowering intelligibility; a column with tight vertical control trades a slightly more considered mounting position for a wavefront that stays on the seated audience and off the reflective planes.

The preset assumes a 24 x 14 m room, a conference-auditorium SPL target, a rear-listener distance of about 18 m and 55% power. The cabinet shown is a JBL Professional CBT 50LA-1 install column, one steerable-column option TechnoGuru specifies where suitable; other columns and steerable arrays produce a comparable input shape, so switch models in the dropdown to compare SPL and quantity.

Expect the planner to show SPL near the speech target with comfortable headroom, because the engineering value of a column here is the vertical beam pattern rather than the dB figure. For a room of this width the suggested count typically lands at a left/right pair flanking the presentation wall; a single central column can work for pure speech, but the pair is the usual convention for stereo program material and balanced coverage.

This preset does not model the room's RT60 (which determines whether the dispersion advantage survives contact with an untreated hall), the assistive-listening and lecture-capture feeds a teaching space needs, subwoofer support for program material, or the DSP and beam-steering setup that delivers the predicted pattern. Final make, model and quantity are selected after drawings and site conditions are reviewed and remain subject to project requirement, consultant or client approval and availability. Use the brief wizard or /contact to hand a safe enquiry summary to TechnoGuru's AV and acoustics scope.