Meyer Sound and L-Acoustics: how the choice actually gets made Two manufacturers, one decision, and the four things that settle it on a real job — coverage against the room, weight against the roof, where the amplifier lives, and what the rider says. None of which is which one sounds better. LED wall or projection: how the room settles it One measurement decides this and it is not the size of the projector. Why ambient light raises the black rather than dimming the picture, why a 20,000-lumen projector can land below the lowest published viewing category in a normally lit space, and the four questions that settle it. Why a field gets a second system, not a louder one Sound pressure falls about six decibels every time the distance doubles. What that does to a long room, how a delay position is timed, and why the answer moves by a few milliseconds across a hot afternoon. Your eye adapts. The camera does not. Color temperature decides more than color does, and the moment an event is streamed the lighting stops being an aesthetic decision and becomes an exposure requirement. An outdoor wall is a sail Daylight, wind load and ground support — the three problems that do not exist indoors and decide everything about a wall that does not have a roof over it. The permit is the schedule A public site belongs to everybody until hours before doors. What that does to a build, what a site plan has to show, and why nothing on a park site is provided. The room mix is the wrong mix to send A stream is a second show with its own audience and its own failure modes. Camera positions, redundancy, and the upload a venue can actually sustain for a whole program. A substitution call is a failure, not a negotiation What an advance is for, why a changeover is a scheduling problem before it is an equipment one, and what a backline tech is actually there to do. Eleven questions, and no calculator Two events with the same guest count can differ by a large multiple, and the reasons are physical. The questions a producer asks before quoting anything, in the order they get asked.