- Pixel pitch range: Under 1 mm for close viewing up to 10 mm+ for large venues
- Viewing rule: Roughly 1 mm of pitch per 2-3 m of comfortable reading distance
- Indoor brightness: Typically 500-800 nits for controlled lighting
- Outdoor brightness: Typically 4000-6000+ nits for daylight
- Standard cabinet: 500 x 500 mm and 500 x 1000 mm panels
- Signal chain: Source to processor/sending card to receiving card to cabinet
What a video wall purchase contains
A video wall is not one product. It is a set of cabinets that tile into a canvas, a structure that carries them, a processor that decides what appears where, and a signal chain that carries sources from where they are generated to the wall. A weak part pulls the whole installation down to its level.
Start by listing the parts as line items: cabinets and modules with their dimensions and weights, the mounting frame and its interface with the building, the sending and receiving cards, the processor and its input capacity, the switcher if sources are shared, cabling and power distribution, and the labour for alignment, calibration and handover. A quote that names only a screen and a price per square metre is answering a different question than the one you asked.
Start from viewing distance, not from a price
Pixel pitch decides how close a viewer can stand before the pixels show. As a working guide, a pitch of about 1 mm suits a viewer roughly 2-3 m away, and the comfortable distance grows with the pitch. Pitch also sets the cabinet count for a given wall size, so it drives both the image quality and the budget at once.
Wall dimensions then follow the room and the job. In a control room the wall must carry the windows operators read from their desks; in a lobby it holds one image seen from the entrance. Those briefs produce different canvas sizes and often different pitches. Work from source resolution to canvas as well: a canvas that does not divide into the content resolution forces scaling, and scaling a live feed is where softness appears.
Processing, scaling and source management
The processor is the part buyers underestimate. It receives sources, scales them, decides layout and sends the result to the wall. Its input count, its ability to show several windows at once, and its behaviour when a source is plugged in decide how the wall feels in daily use.
Ask how the processor copes when a laptop connects: does it negotiate the wall's capabilities and pass a sensible timing, or force a fixed timing on everything? Does it hold the layout through a power cycle? Can an operator change layouts without a technician? Those answers come from a demonstration with your own sources and content, not from a datasheet.
Structure, service access and the space behind
Every wall needs a structure, and every structure needs a way to reach the modules. That access is a design decision with cost attached. Front-service modules let a wall sit against a finished surface; rear service needs a corridor, a plant room or a maintenance gap behind. In a retrofit the second option is often unavailable, which makes the first mandatory.
Structural information should travel with the package: cabinet weight, total load, fixing points and the assumptions behind the calculation. Hand those to the building's engineer early. A wall designed after the building is finished has to negotiate with what the building already carries, and that negotiation is cheaper before the steel is ordered.
Compare quotes on scope, not on headline price
Two video wall quotes rarely cover the same scope. One includes the processor, the other leaves it to the AV contractor. One includes alignment and calibration, the other delivers cabinets only. One lists spare modules, the other assumes the client orders them later. Putting the quotes into one table, line by line, shows where the difference sits.
Add the items easy to leave out: spare modules and receiving cards, the calibration visit after the wall has run for a while, the as-built cabinet map, and the training that lets an operator change a layout. Confirm who owns the interface with the building's power and network, because that boundary is where responsibility quietly changes hands.
Commissioning and handover
Commissioning is where the wall becomes a working system. It should cover mechanical alignment across the face, colour and brightness uniformity across cabinets, the layout presets an operator will use, and a test with real content at real viewing distance. That last item catches more problems than any test pattern.
Handover should leave documents: the cabinet map with serial numbers, the processor configuration, the calibration record, the spare-parts list and the acceptance sign-off. A wall without a cabinet map turns a five-minute module swap into a search through a service call.
| Pitch (mm) | Comfortable viewing distance | Typical use |
|---|---|---|
| 0.9 - 1.5 | 1 - 4 m | Boardrooms, broadcast, control rooms |
| 1.8 - 2.5 | 3 - 6 m | Meeting halls, retail flagship |
| 3.9 - 4.4 | 5 - 10 m | Stage backdrops, event walls |
| 6 - 10+ | 10 m and beyond | Stadiums, large outdoor facades |
Two quotes that covered different scopes
Two video wall bids arrived at close headline prices. One included the processor, alignment and a calibration visit; the other delivered cabinets only and left processing to the AV contractor. Once written as one line-item table, the apparent saving in the second quote disappeared behind the parts it omitted.
A processor demo that exposed the gap
A wall looked fine in a showroom until the client plugged in their own laptop and asked for a second window. The processor could not hold the layout through a power cycle and needed a technician for every change, a limitation no datasheet had revealed and only the live demo exposed.
Putting this into practice: video wall buying guide for project
- List every part as a line item Break the purchase into cabinets, structure, processor, sending and receiving cards, cabling, power, spares and commissioning. A quote that names only a screen and a per-square-metre price is answering a different question than the one you asked.
- Start from viewing distance and content Let pitch follow the nearest viewer and the smallest content detail, then size the canvas from the room. A canvas that does not divide into the content resolution forces scaling, and scaling a live feed is where softness appears.
- Request a demonstration with your own sources Bring your laptop, your content and your layout questions to the demo. Ask how the processor copes when a source connects, whether it holds layout through a power cycle, and whether an operator can change layouts without a technician.
- Compare quotes on scope, not headline price Put two bids into one table line by line. One may include the processor, the other leave it to the AV contractor; one may include calibration, the other deliver cabinets only. The difference usually sits in what is behind the screen.
- Accept only after a test with real content Cover alignment, uniformity between cabinets, every input the operator will use and a run at the intended viewing distance. Record results with the cabinet map and processor configuration so a later module swap is a five-minute task, not a search.
Clearing up video wall buying guide for project
“The per-square-metre price is the price of the wall.” — It is only the panels. The structure, processor, signal chain, spares and commissioning are separate costs that often exceed the screen itself, so two close per-square-metre numbers can describe very different total bills.
“The processor is a minor part of the system.” — The processor receives sources, scales them, decides layout and sends the result to the wall. Its input count, multi-window behaviour and power-cycle handling decide how the wall feels daily, and those answers come from a demonstration, not a datasheet.
Points to confirm on video wall buying guide for project
- Confirm the content resolution and the viewing distance before choosing pitch
- List every part as a line item: cabinets, structure, processor, spares, commissioning
- Decide front or rear service from the available access behind the wall
- Request a demonstration with your own sources and your own content
- Agree the acceptance test and the as-built documentation before signing
What to carry forward on video wall buying guide for project
Buying a video wall means buying a system: cabinets, structure, processing, signal chain and commissioning. Size it from the room and the content, settle service access before the steel is ordered, and compare quotes as line items so the processor, the calibration visit and the spares do not arrive as surprises. Then test with real content, at real distance, before you sign.