1. Sizing the room for the kit, not the crew
The most frequent mistake is a room measured around the equipment list. The vision mixer, replay machine and graphics PC all fit on the plan, and then five people have to work in it for six hours. Elbows touch, the director cannot see the switcher's hands, and nobody can stand up to talk to the floor manager without blocking someone's screen.
We start from the people instead. Before drawing a rack or a desk we ask who sits in the room on a typical show: director, technical director, graphics and replay, audio, perhaps a producer behind them. Each seat gets a working width, a clear view of the monitor wall and a path to the door that does not cross another operator.
A compact gallery can work very well, but compact means every centimetre is decided, not that things are squeezed in until the doors close.
- Count the seats for the longest show, not the average one
- Leave a walkway behind the desks
- Give the director a view of every operator
2. A monitor wall that is hard to read
Monitor walls often grow by adding screens where there is a gap. The result is a wall where the programme output sits in a corner, preview is the same size as a spare camera, and the eye has to hunt. In a live show a half-second of hunting is a missed cut.
We lay the wall out in a fixed logic: programme and preview at the centre and at eye height, camera sources grouped by number, graphics and replay outputs to one side, and meters or clocks where they can be seen without turning. Screens are mounted so that the top row is not above a comfortable neck angle for a long evening.
Labels matter as much as placement. Every source name on screen should match the name on the intercom and on the run sheet, so the director calls one name and everyone sees the same thing.
- Programme and preview largest, centred, at eye height
- Consistent source names across wall, intercom and run sheet
3. Signal routing worked out on the day
Another common mistake is leaving routing to the installation day. Cameras arrive on one set of connectors, the mixer wants another, and a drawer of adaptors becomes the real signal path. It works until a plug is knocked, and then nobody can say where the signal was supposed to go.
Daniel draws the signal path first: every input, every output, every converter, every cable length. The drawing is then used to label both ends of each cable and every port on the patch panel. If a feed drops during a show, the person at the rack can follow the label rather than trace a lead by hand.
We also keep spare paths. A second route for the programme output and for the main camera feeds costs little at fit-out stage and saves a great deal of worry later.
- Full signal diagram agreed before installation
- Both ends of every cable labelled
- A spare route for programme output
4. Treating intercom as an extra
Intercom is frequently bought last and fitted in a hurry, yet it is how a gallery actually runs. If the camera operators cannot hear the director clearly, the best monitor wall in the country will not help. Common faults are headsets that do not suit long wear, one shared channel for everyone, and a talkback panel placed where it cannot be reached without leaning across a colleague.
We plan intercom with the desks. Separate channels for the director's calls to cameras, for production chatter and for the stage manager keep the main line clear. Panels sit within reach of the people who use them most, and a spare headset is kept in the room for visitors.
A short test with every position at full volume, with the room as noisy as it will be on the day, catches most problems before the audience does.
5. Power, heat and cable tidiness left until last
A room full of equipment is a room full of heat, and a room full of cables is a room where someone will eventually trip. These are the details that look minor on a plan and loud on a show night: a rack that shuts a processor down because airflow was blocked, a power strip fed from a single socket, a bundle of cables across the floor at the exact spot where the producer walks in.
We check the available power at survey stage and spread the load across circuits. Racks are given proper ventilation and space behind them for access. Cables run in trays or behind desks, power separate from signal wherever possible, and every run is dressed so it can be traced and replaced.
None of this is exciting work, but it is what keeps a gallery quiet and dependable through a long evening.
- Spread equipment across power circuits
- Keep airflow clear around racks
- Separate power and signal runs where possible
Testing the room before the first show
The last mistake is skipping a full run before real use. A room that looks finished is not a room that has been proven. We run a rehearsal with the crew in their seats: cameras up, graphics in, replay cued, intercom live, and the programme going to its real destination, whether that is a screen, a recorder or a stream.
Any awkward reach, unclear label or dim monitor shows itself within the first twenty minutes of that run. We fix what we find, note it on the handover sheet and leave the room with the people who will use it, so they know where everything is and who to call if something changes.
A good control room is mostly the result of ordinary decisions made early and in the right order: seats before kit, a readable wall, a drawn signal path, proper intercom, tidy power and a rehearsal at the end. None of the five mistakes above needs special equipment to avoid. They need a survey, a plan and a little patience before the first rack goes in.