HDMI female–female coupler adapter c-tech CB-AD-HDMI-FF — HDMI F/F 4K support

c-tech CB-AD-HDMI-FF is an HDMI female-to-female coupler adapter designed to join two standard HDMI cables to create a longer continuous connection. The passive adapter supports up to 4K resolution and provides a compact, low-profile solution for extending HDMI runs without the need for signal conversion or active electronics. Its metal housing and standard HDMI ports make it compatible with TVs, monitors, media players and most consumer AV equipment that use HDMI connectors.

Advantages

The adapter enables simple extension of existing HDMI cables while preserving the original signal path and resolution capability up to 4K. Its female-to-female configuration eliminates the need to replace cables or purchase a single long cable, reducing installation time and cost. The compact form factor and durable construction allow for discreet placement behind AV furniture or wall-mounted displays. No power source or drivers are required, as the coupler is a passive connection that maintains plug-and-play operation.

Suitable for (tasks / use cases)

• Extending HDMI connections between TVs and AV receivers
• Joining two HDMI cables for wall-mounted or hard-to-reach displays
• Connecting media players, game consoles or set-top boxes to monitors
• Temporary installations where a longer HDMI run is needed

Key specifications

• Connector type: female HDMI to female HDMI
• Maximum supported resolution: up to 4K
• Compatibility: standard HDMI cables and HDMI-enabled consumer electronics
• Design: passive coupler, plug-and-play operation
• Form factor: compact, low-profile inline adapter

How to use

To use the HDMI F/F coupler, align and insert the male HDMI connector of the first cable into one side of the adapter, then insert the male HDMI connector of the second cable into the opposite side. Ensure both cable ends are fully seated to maintain a secure electrical connection. After connection, check the source and display devices to confirm that video and audio signals are transmitted correctly. If the combined cable length is very long, be aware that signal degradation may occur depending on cable quality and source device output.

Usage recommendations

Use high-quality, well-shielded HDMI cables when extending runs to preserve signal integrity at higher resolutions. For runs that exceed typical HDMI cable length limits or where active signal boosting is required, consider active extenders or repeaters rather than a passive coupler.