Ballroom sound checklist: meeting mode vs banquet mode

Start with the operating modes, not the equipment. List the layouts: theatre, classroom, banquet, exhibition and dance floor. For each mode, mark the stage, the head table, the dance floor and the service routes.

The loudspeaker layout must cover the important seats in every mode. A line array aimed for the banquet floor may not cover the stage in a theatre layout; a distributed system may be better for a flat divisible room.

Speech mode needs intelligibility and controlled level. Music mode needs low-frequency headroom and a wider level range. Trying to solve both with one preset produces a room that is either harsh for speech or thin for music.

Define the target for each mode: speech level at the last table, music level on the dance floor, and the maximum level at the property boundary. The presets should be named and locked.

For a large ballroom, a line array or a point-source array can cover the depth; for a low, wide room, distributed loudspeakers may be more even. The choice depends on the ceiling height, the room depth and the sight lines.

Aim the array at the seating, not at the back wall. Use delay speakers for a deep room and keep the front rows out of the pattern if the array is flown close to the stage.

A banquet with music needs low-frequency support that a speech system does not. Add subwoofers with the correct crossover and a preset that can be bypassed for speech-only events.

Place the subwoofers to avoid a strong power-alley effect at the head table. In a divisible room, check the low-frequency behaviour with the partitions open and closed.

Wireless microphones fail for one of three reasons: a weak RF path, a crowded frequency band or a battery that was not checked. Plan the antenna position, the receiver location and the spare batteries before the event.

For a hotel with multiple ballrooms, coordinate frequencies across the building. A scan on the day of the event is not a substitute for a frequency plan.

The presenter needs to hear the room, and the band needs to hear itself. Add stage monitors or in-ear monitoring for music events, and a separate foldback path for the conference mode.

Keep the monitor level independent of the main system. A monitor that follows the main volume will feedback or disappear at the wrong moment.

Commission the ballroom in both modes. Measure speech at the last table, music on the dance floor, RF coverage at the stage and the battery status of every wireless channel.

Send the room dimensions, ceiling height, maximum table count, stage position, dance-floor location and the types of events. Add the existing PA or ballroom system if the project is a retrofit.

With those inputs we can return a coverage concept, a loudspeaker and subwoofer count, a wireless plan and a preset list. The final model list follows the events, not the catalogue.