HDMI, DisplayPort & AV Cable Guide: What Installers Need to Know (2026)
Mar 21, 2026
Audio-video cabling has evolved rapidly — HDMI 2.1, DisplayPort 2.1, USB-C alt mode, and fiber HDMI now coexist on commercial and residential projects. This guide covers every AV cable type an installer encounters.
HDMI Standards
| Standard | Bandwidth | Max Resolution | Max Distance |
|---|---|---|---|
| HDMI 1.4 | 10.2 Gbps | 4K@30Hz | 15m |
| HDMI 2.0 | 18 Gbps | 4K@60Hz HDR | 10m |
| HDMI 2.1 | 48 Gbps | 8K@60Hz / 4K@120Hz | 3m passive |
For runs over 10m at 4K, active optical HDMI (AOC) cables eliminate signal degradation and can reach 30-100 meters.
When to Use Each Cable
HDMI: Universal for consumer and commercial AV — TVs, projectors, conference rooms, digital signage.
DisplayPort: Preferred for computer monitors and multi-display daisy-chaining. DP 2.1 delivers 80 Gbps.
USB-C (Alt Mode): One cable for 4K video, data, and 100W power delivery in conference rooms.
Commercial Installation Tips
For in-wall runs, use CL2/CL3 rated cables for fire code compliance. For plenum spaces, use CMP-rated cables. For conference rooms, spec active optical HDMI for runs over 7.5m.
RG6 Coaxial
Essential for cable TV distribution, satellite, and analog security systems. RG6 supports frequencies up to 3 GHz. Use compression F-connectors for reliable, weatherproof terminations.
