AVID 9900-74279-00 Pro Tools | MTRX II Audio interface (Base Unit)

Designed for Pro Tools HDX and Modular Studio Systems
The Avid Pro Tools | MTRX II Base Unit with DigiLink, Dante 256, and SPQ is a high-performance audio interface engineered for serious music production, audio-post, and immersive audio workflows. Whether you're building a next-generation Pro Tools HDX system or expanding your studio's capabilities with Dante audio networking, this 2RU rackmountable interface is your all-in-one routing, monitoring, and conversion solution. It offers 64 channels of DigiLink I/O, 256 channels of Dante, 64 MADI channels, and onboard SPQ speaker processing to support room calibration for formats up to Dolby Atmos.

Fully Customizable I/O with Room for Expansion
The MTRX II is modular by design, featuring eight open slots for analog or digital option cards. That means you can tailor it to your exact needs—whether for multi-mic tracking, large-format mixing, surround monitoring, or digital broadcast routing. This level of hardware customization lets you support up to 576 DigiLink channels, 1280 Dante channels, and complex multiformat monitoring in a single, streamlined interface. It’s the hub that unifies your studio's signal flow.

Unmatched Routing Power with Built-In Matrix Mixer
With a massive 4096 x 4096 internal routing matrix and expanded 512 x 64 summing mixer, the MTRX II allows you to route any signal to any destination. Need to switch from stereo to Dolby Atmos monitoring mid-session? No problem. Want to patch audio between studios or link playback sources with your rendering and cue systems? This unit supports it all—locally or across facilities—without the need for patch bays or external routers.

Pristine AD/DA Conversion and Room Correction Capabilities
At the heart of the MTRX II lies world-class audio fidelity. AD/DA converters deliver sample rates up to 384 kHz PCM and DSD, offering 128 dB of dynamic range and less than -120 dB of harmonic distortion. Integrated SPQ speaker processing delivers up to 128 channels of filter-based correction, giving you full control over room EQ, time alignment, and monitoring accuracy—whether you're mixing music, film, or immersive formats.

Seamless Dante Audio Networking Built In
Built with 256 Dante channels onboard, the MTRX II simplifies integration with any audio-over-IP setup. Whether you're routing audio to another control room, connecting outboard gear, or streaming across facilities, Dante enables low-latency digital signal transport with unmatched flexibility. Add Dante option cards to scale up to 1280 channels of IP audio, all managed through DADman software.

Monitor Control from Avid S6 and EUCON Surfaces
Total system control is a click away thanks to EUCON integration and DADman software. Control source routing, monitor profiles, cue mixes, and fold-downs directly from your Avid S6 or compatible surface. Need to switch from 7.1.4 to stereo? Load a preset. Working across multiple systems? Manage all workstations and interfaces centrally with full recall of complex routing and monitoring states.

Ready for the Most Demanding Post and Music Workflows
Built for the modern hybrid studio, the MTRX II is equally at home in major scoring stages, immersive post rooms, and commercial music production environments. With support for Thunderbolt, SDI, MADI, AES, analog, and IP audio, it adapts to any workflow you throw at it—while keeping your signal path uncompromised and your sessions perfectly in sync.