Key Digital recently added a line of plenum active optical HDMI fiber cables aimed at residential upgrades. The company’s first-ever plenum-rated HDMI cables available in lengths from 10 m (33 feet) to 100 m (328 feet) include:

• KD-AOCH33P
• KD-AOCH49P
• KD-AOCH66P
• KD-AOCH98P
• KD-AOCH131P
• KD-AOCH164P
• KD-AOCH328P

(The number corresponds to the length.)

This cable series supports 4K resolutions with Ultra HD/4K support up to 4096×2160 or 3840×2160 50/60Hz at 4:4:4 with 18 Gbps, and are directional and 28 AWG.

Each cable is HDCP 2.2 compliant and backward compatible with previous HDCP versions. Deep color is supported up to 4K 24/25/30Hz 4:4:4/12 bits, 50/60Hz 4:2:0/12 bit, and HDR10 (High Dynamic Range).

The signal video and audio layers are not subjected to the typical signal degradation of sending the most substantial portion of HDMI signals, the TMDS channel, over optics. A minimal amount of copper wiring is included inside the cables to carry power and essential EDID handshaking information, HDCP authentication and more.

Audio Return Channel (ARC) support allows audio to be returned from the display back to the HDMI source for amplification and display. Support for digital audio formats includes Dolby TrueHD, Dolby Digital Plus, Dolby Atmos and DTS-HD Master Audio. The Ethernet channel on the cables supports up to 100 Mb/s of Ethernet speeds between two HDMI connected devices.