Magewell SDI 4K Pro Capture Card Brings USB 3 Gen 2x2 and Audio Loop-Through to Compact Workflows

Author: Simon Tillyer

Published 27th May 2025

Magewell SDI 4K Pro Capture Card Brings USB 3 Gen 2x2 and Audio Loop-Through to Compact Workflows

What challenge does this capture device aim to solve?
Capturing high-quality SDI video for streaming, production, or recording is often limited by interface speed and external audio integration. Many compact capture devices struggle to keep up with the demands of full 4K60 workflows, especially when attempting to maintain minimal latency, loop-through outputs, and synchronised external audio. Magewell’s SDI 4K Pro aims to deliver a professional-grade capture solution that addresses all of these points in a single device.


What did users rely on before this upgrade?
Content creators and engineers typically used HDMI-based capture devices or older SDI models limited to 1080p or lower frame rates. Even when 4K SDI devices were available, they often came with bottlenecks in the USB interface, requiring PCIe solutions or specialist equipment for higher bandwidth. Integrating external audio sources added another layer of complexity, frequently needing separate audio capture paths and sync corrections in post.


How does the SDI 4K Pro improve the workflow?
Magewell’s SDI 4K Pro introduces USB 3 Gen 2x2 connectivity, offering 20Gbps of bandwidth, enough to support uncompressed 4K at 60fps over a single 12G-SDI input. The unit includes a loop-through SDI output for local monitoring, enabling real-time viewing without needing additional splitters. It supports both embedded SDI audio and external audio ingest, allowing users to combine and map audio sources directly within the device. 
The device is plug-and-play compatible, compact, and designed with reliability in mind, making it an ideal choice for field recording, remote streaming kits, or compact studio setups. It’s already shipping globally and expected to see strong demand from the outset.


Who should consider this product?
This capture card is well suited to professionals working in live streaming, remote production, AV integration, and digital media who require a flexible yet robust 4K capture workflow. It’s particularly beneficial for those needing high bandwidth via USB without investing in bulky capture infrastructure. For creators and engineers looking to future-proof their portable setups, the SDI 4K Pro delivers power, performance, and versatility in a single compact device.


More information is available at magewell.com

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