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4K HDMI Cable - 25m

HDMI-25M-20

4K HDMI Cable. Length 25m.

Standard: HDMI 2.0
Type: HDMI
Length: 25 m
Connectors: HDMI

In-depth technical details

HDMI 2.0 raises the bandwidth to 18 Gbps, enough for real 4K at 60 frames per second -- the practical difference from 1.4, which caps 4K at 30fps. Still uses ARC for audio return, not the newer eARC.

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Connector anatomy

HDMI Type-A

01 19 pins Three differential TMDS pairs carry picture and sound, a fourth carries the clock, and the rest are named-function pins.
02 CEC A single wire that lets one remote control multiple connected devices, e.g. a TV and a receiver.
03 DDC / +5V The EDID handshake -- how the source learns which resolutions the display supports.
04 HPD Hot Plug Detect -- how the source knows a display is connected at all.
05 Metal shell The shell is grounded and wraps the pins, keeping interference out of a very high-frequency signal.
06 Strain-relief boot Stops the wires flexing where they leave the plug — the exact point most cables fail.
07 Outer jacket The outer sheath protecting the conductors inside from abrasion and moisture.

Technical illustration, not a photo of the actual product

How it works

HDMI cable construction

The picture goes out on three differential pairs, each carrying the signal and an inverted copy. The display subtracts one from the other, so any noise that hit both wires cancels out. The fourth pair carries the clock that says when each pixel starts.

01 4 shielded pairs Three carry data (TMDS), one carries the clock. Each pair is individually shielded because these frequencies run into the gigahertz.
02 Control wires The DDC channel reads what the display can do, CEC lets one remote control every device, plus a 5 V line.
03 Shield A grounded conductive wrap that absorbs electromagnetic interference before it reaches the signal.
04 Outer jacket Protects everything inside mechanically. It plays no electrical role.

Technical illustration, not a photo of the actual product

From the published standard

How it works

An HDMI 2.0 cable carries picture and sound digitally over three differential pairs using TMDS encoding, with a fourth pair for the clock. The standard provides 18 Gbit/s of total bandwidth, which is what makes 4K at 60 frames per second possible. Because the signal is digital it either arrives intact or it drops out — it does not fade gradually the way analogue VGA does.

Total bandwidth: 18 Gbit/s
Video bandwidth after TMDS encoding: 14.4 Gbit/s
Maximum resolution: 4K at 60 Hz, 24-bit colour
Standard released: HDMI 2.0, September 2013

This information comes from published sources about this type of product, not from the supplier.

Applications

Connecting a laptop or receiver to a display
Running picture to a screen in a hall

Technical specifications

Standard	HDMI 2.0
Type	HDMI
Length	25 m
Connectors	HDMI

Alternatives

Flat HDMI Cable - 0.5m shorter 4K HDMI Cable (Blue Connector) - 1.5m shorter Full HD HDMI Cable - 1.5m shorter 4K HDMI Cable - 1.5m shorter 8K HDMI Cable - 1.5m shorter 4K HDMI Cable (Blue Connector) - 10m shorter

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