InLine 17940X HDMI cable 40 m HDMI Type-A (Standard), black

The InLine HDMI AOC Cable 17940X Ultra High Speed 8K is an active optical HDMI cable engineered to transmit high-bandwidth video and audio signals reliably over a 40 m distance. Designed for environments where copper HDMI cables lose signal quality, this Active Optical Cable (AOC) maintains 8K resolution capability and reduced attenuation by converting electrical signals to optical and back at each end. The cable supports modern AV demands and is intended for fixed installations where long runs and consistent performance are required.

Advantages

This active optical HDMI cable provides stable high-bandwidth transmission over long distances with minimal signal degradation compared to standard copper cables. The use of optical fiber reduces susceptibility to electromagnetic interference and allows thinner, more flexible cable runs for cleaner installations. The cable supports Ultra High Speed HDMI features necessary for 8K video and multichannel audio, making it suitable for professional AV setups and demanding consumer applications.

Suitable for

When it may not be suitable

This cable may not be necessary for short-distance setups where standard copper HDMI cables already provide reliable 4K/8K transmission. It is not intended as a user-serviceable product; connectors and electronics are integrated for active conversion, so it is less appropriate where repeated disconnection, custom cable termination, or on-site repair is expected. Use caution if you require bi-directional power or specific device-side power configurations that differ from typical HDMI source/display behavior.

Key specifications

How to use

Connect the HDMI plug on one end to the video source (e.g., 8K media player, PC graphics output or AV receiver) and the other end to the display or projector HDMI input. Ensure both connected devices are powered on and set to the appropriate input. Because the cable contains active electronics, avoid forcing or excessively twisting the connectors; route the cable with gentle bends and secure it to avoid strain. No external power supply is normally required—power is negotiated through the HDMI connection—but verify compatibility with your devices if power delivery limitations exist.

What to consider before purchase

Recommendations

For best results, test the full signal chain after installation using the target resolution and refresh rate. Secure the cable to prevent sharp bends near connectors, and avoid running alongside high-voltage power lines to minimize residual interference. If signal issues appear, confirm firmware and settings on source/display devices and try alternate HDMI inputs before replacing the cable.