As displays become larger and resolutions continue to increase, HDMI cable distance limitations become more noticeable.
Over longer cable runs, signal quality can degrade, especially when transmitting 4K content. Common issues include:
Intermittent black screens
Screen flickering or image dropouts
No signal detected on the display
Resolution dropping from 4K to 1080p
Unstable performance during extended use
In some cases, audio and video may also fall out of sync, affecting presentations, video conferencing, and media playback.
These problems are common in conference rooms, classrooms, training centers, and home theaters. They occur when source devices and displays are far apart.
However, extending HDMI signals is only part of the challenge.
Many modern AV systems also require audio to travel in the opposite direction. For example:
A conference room display needs to send audio back to a centralized sound system.
A smart TV needs to return audio from built-in streaming apps to an AV receiver or soundbar.
Integrators may need remote control access to displays and source devices installed in different locations.
In these situations, a standard HDMI extender may not be enough.
An HDMI ARC Extender sends video over long distances and supports audio return. It helps build reliable AV systems without extra audio cables.
As a China HDMI Extender manufacturer, GPRO serves AV integrators, distributors, and OEM partners worldwide. GPRO develops HDMI ARC Extender solutions for long-distance 4K video transmission. These solutions support audio return and simpler system integration.
An HDMI ARC (Audio Return Channel) Extender allows both video transmission and audio return over a single category cable.
Unlike standard HDMI extenders that send video to the display, an ARC-enabled extender also sends audio back.
This audio can travel from the display to an AV receiver, amplifier, or audio processor.
This capability significantly simplifies system design while reducing cable complexity.
A professional HDMI ARC Extender typically supports:
For modern AV installations, these features help create a cleaner and more reliable system architecture.
A standard deployment consists of:
The transmitter connects to the source device and converts the HDMI signal for sending over Cat5e or Cat6 cable.
A single Cat5e, Cat6, or Cat7 cable carries:
The receiver restores the signal and outputs HDMI to the display.
This architecture reduces cable runs while maintaining full video and audio performance.
Not all HDMI extenders are designed for professional installations.
When selecting a solution, several features are especially important.
Many extenders claim 4K support but only operate at reduced chroma subsampling.
For conference presentations, spreadsheets, CAD drawings, and detailed graphics, full 4K60 4:4:4 support delivers sharper image quality.
The EX70H2 supports:Up to 4K@60Hz Dolby Vision Supports both static and dynamic HDR formats up to 4K@60Hz, including HLG, HDR10, HDR10+, and Dobly Vision.
This ensures professional image quality for business and entertainment applications.
ARC support is one of the most overlooked requirements in AV projects. Amazing Audio with ARC
Send high-bitrate audio formats such as or DTS:X from your smart TV back to an AVR or soundbar.Also backward compatible with ARC up to 5.1CH.
Without ARC, additional audio cables may be required between the display and the audio system.
With ARC enabled:
For home theaters, ARC creates a much cleaner audio workflow.
For conference rooms, it simplifies integration with centralized audio equipment.
Not all installations use ARC-capable displays.
The EX70H2 includes SPDIF optical audio return support, allowing audio to be routed back even when ARC is unavailable. (ARC set to SPDIF): When ARC is set to "SPDIF",the SPDIF port must be connected to the TV to enable ARC sound, as the TV itself does not support ARC. The sound is routed through SPDIF instead.
This provides compatibility with:
For integrators, this flexibility can eliminate costly system upgrades.
Power management is another important consideration.
Traditional extender systems often require power supplies at both the transmitter and receiver locations.
The EX70H2 supports bi-directional PoE, allowing the entire system to operate using a single power adapter.
Benefits include:
This is particularly useful for wall-mounted displays and conference room installations.
Easily control both HDMI source and display. at either transmitter or receiver side. Remote device control remains critical in professional AV environments.
The EX70H2 supports:
Users can control source devices from the display location or manage display functions from the equipment rack.
This improves operational convenience without requiring additional control infrastructure.
In a modern conference room, equipment is often centralized in a rack cabinet.
The system may include:
Using an HDMI ARC Extender allows the display to be installed up to 40 meters away while maintaining:
The result is a cleaner installation and a more reliable user experience.
Home theater enthusiasts increasingly rely on streaming platforms integrated directly into smart TVs.
Without ARC support, routing this audio back to an AV receiver can become complicated.
An HDMI ARC Extender simplifies the process by allowing:
At the same time, source devices can remain hidden in a dedicated equipment cabinet while maintaining full system functionality.
Developed by GPRO, a professional HDMI extender supplier and OEM/ODM manufacturer in China. Professionals use the EX70H2 for AV installations. Video quality, audio options, and easy setup are all equally important.
Key advantages include:
Whether you use it in conference rooms, training centers, control rooms, classrooms, or home theaters, it works well.
It provides stable HDMI transmission over long distances. It also supports advanced audio return features.
Beyond product performance, many AV distributors and system integrators require flexible sourcing and project support.
As a China HDMI Extender supplier, GPRO provides:
This allows partners to deploy reliable HDMI extension solutions while maintaining their own brand identity and market positioning.
Building a reliable HDMI extension system requires more than simply extending a video signal.
Modern installations increasingly demand audio return, remote control, simplified power management, and support for high-resolution content.
An HDMI ARC Extender combines these functions into one solution. It reduces installation complexity and improves overall system performance.
For AV integrators, conference room designers, distributors, and AV brands, finding a reliable HDMI extender manufacturer in China matters.
The EX70H2 is a practical choice.
It is easy to scale as your needs grow. It supports long-distance 4K HDMI distribution and full ARC support.
