— LED Wall · Fine-pitch indoor
ROE Visual Ruby RB1.5: cabinet grid & viewing distance
Problem. A 4 x 2.25 m (16:9) wall built from ROE Visual Ruby RB1.5 cabinets must resolve to a whole number of cabinets in each direction, so the finished wall is rarely the exact target size. The real design decision is how the cabinet grid, actual wall dimensions, and native resolution settle out, and whether the intended closest-seat distance sits inside this pitch's optimal viewing band.
Answer. At a 4 x 2.25 m target, Ruby RB1.5 cabinets resolve to a 7 x 7 grid, giving an actual wall of 4.2 x 2.36 m. Native resolution comes out to 2688 x 1512 (approximately 4.1 MP), comfortably inside a 3 m closest-seat setting.
02 / In depth
How this preset reads — the engineering view.
Pixel pitch is the number that decides everything downstream. At 1.56 mm, Ruby RB1.5's cabinet grid and its optimal viewing band both fall out of the same figure: the recommended viewing distance for video content runs from roughly 1.6 m to 3.1 m (pitch x 1.0 to pitch x 2.0), and the 7 x 7 cabinet layout at a 4 x 2.25 m target is simply how that pitch's cabinet module tiles across the requested area.
1000 nits is a controlled-indoor brightness figure, not a daylight or high-ambient-light rating, so this configuration suits meeting rooms, control rooms, studios, and similar indoor spaces where light levels are managed rather than direct-sun environments. Wall-mount and front-service both describe how the wall is installed and maintained: front-service means individual cabinets or modules can be accessed and serviced from the viewing side without pulling the whole wall off its mount. At the computed 7 x 7 grid, native resolution lands at 2688 x 1512 (about 4.1 MP), which suits broadcast, video-wall, and detailed-content use at typical seating distances rather than banner-style far-viewing displays.
Drag the wall-size input to change width and height and watch the cabinet grid, actual wall dimensions, and native resolution recompute together. Because cabinets are a fixed module size for this pitch, they snap to whole numbers, so the actual wall the calculator reports may differ slightly from the target size you dragged to — that difference is expected and is exactly what the grid rounding shows.
The calculator sizes the cabinet grid, wall footprint, and native resolution for this pitch — it does not decide structural or rigging load for the finished wall weight, the power and data cabling run to each cabinet, the video processor or scaler needed to feed the wall, how source content resolution maps onto the native pixel count, or ambient-light calibration for the room the wall goes into. Those remain separate engineering and installation decisions.
What this preset deliberately does not solve
- Cabinet snapping means the actual wall size can differ from the width and height you enter; the calculator always reports the true, buildable dimensions rather than the raw target.
- The 1.6-3.1 m viewing band is a general guide for video content at this pixel pitch, not a fixed rule; content type, camera angles, and room layout can shift the comfortable viewing range.
- Figures shown (grid, wall size, resolution) describe this specific ROE Visual Ruby RB1.5 configuration only and do not carry over to other pixel pitches or cabinet products without recalculating.
How this preset differs from its siblings
Ruby RB1.5's 1.56 mm pitch and 1000 nits combination is tuned for close, controlled-indoor viewing rather than far-viewing or high-ambient-light installations, so its optimal viewing band and cabinet grid maths sit differently to coarser-pitch or higher-brightness fine-pitch indoor products. Its front-service, wall-mount profile also assumes viewing-side access for maintenance, which is a distinct installation approach from rear-service or floor-supported LED wall products. This preset exists separately because the cabinet grid, resolution, and viewing-distance numbers are specific to this pitch and cannot be read off a generic fine-pitch indoor result.
03 / Hydrated calculator
Try the configuration — live.
The calculator below is preloaded with this preset’s state. Adjust any input — your URL stays shareable.
— Calculator · LED wall size
The wall built cabinet by cabinet.
Pick a brand, model, wall dimensions and viewing distance. Cabinet count, native resolution, power, weight and feasibility flags resolve in real time. Sources cited.
Cabinets
49
7 across × 7 down
Native resolution
2688 × 1512
4.1 megapixels
Actual wall
4.20 m × 2.36 m
9.9 m² · cabinet-snap
A planning link — not a quote.
- model
- ROE Visual Ruby RB1.5 — P1.5
- pitch
- P1.56 mm
- brightness
- 1,000 nits
- refresh
- 3,840 Hz
- viewing
- 1.56 m – 3.12 m optimal
- weight
- 318 kg
- power
- avg 2.08 kW · peak 5.16 kW
Fine-pitch indoor LED aimed at broadcast, corporate and control-room installs where ROE's processing ecosystem is preferred.
Indicative cabinet build for shortlisting — confirm structure, power and processing against a site survey before ordering.
What changes this estimate
- Actual viewing distances in the room
- Pixel pitch availability in the chosen series
- Content type (data, video, fine text)
- Mounting structure & cabinet dimensions
Feasibility
Cabinet grid resolves to 4.20 m × 2.36 m (target was 4.00 m × 2.25 m).
A planning link — not a quote.
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Brief us on the project — with this configuration.
Presets are a typology starting point. The brief wizard captures the room geometry, programme and constraints we need to translate this configuration into a real design.