Learn AV, LED, LCD, OLED and digital signage terminology — explained simply.
| Spec | What It Means | Recommendation |
|---|---|---|
| Lumens | Brightness | 3,000–5,000 for meeting room; 10,000+ for large venue |
| Resolution | Image sharpness | WUXGA (1920×1200) minimum for presentations |
| Throw Ratio | Distance ÷ width | 0.5–1.0 = short throw; 1.5–2.5 = standard |
| Laser vs Lamp | Light source | Laser: 20,000h life, no bulb changes. Lamp: cheaper, 2,000–5,000h |
| Keystone | Image correction | Digital = quality loss; Lens shift = better |
| Audience | Recommended System |
|---|---|
| 50–100 | 2× powered speakers (12") + small mixer |
| 100–500 | 2× tops + 2× subs + 16ch digital mixer |
| 500–2000 | Line array (4–8 boxes per side) + subs + monitors |
| 2000+ | Full line array + delay towers + monitor world + FOH |
All modern lights use DMX512 protocol. Each light gets a DMX address (1–512). A lighting console sends commands to these addresses.