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Grimm DAC Music Player MU2-Moondog-angled-1.jpg
Grimm DAC music player MU2-pcb-view.jpg
Grimm DAC music player MU2-Inside.jpg
Grimm DAC music player MU2-back-top-free.jpg
20251028_194126162_iOS.jpg
Grimm DAC music player Grimm-Audio-IR-remote-with-MU2.jpg
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Grimm Audio | MU2 DAC

from $20,000.00
Optional 4TB internal storage:

Roon Ready DAC, Streamer & Integrated Preamp

The Grimm Audio MU2 is a reference-level DAC, Roon Ready music streamer, and integrated preamplifier — designed to serve as a complete digital front end for high-end systems.

The MU2 is not just a convenience device; it combines precision digital-to-analog conversion, advanced streaming architecture, and exceptional build quality in a single, elegantly executed component. Optional internal storage (4TB) is available for locally stored music, allowing the MU2 to function as a complete, self-contained source component.

For audiophile listeners looking for uncompromising digital playback — whether through Roon or other streaming platforms — the MU2 delivers a coherent, elegant solution in a single chassis.

Listening with the MU2

We have spent considerable time living with the MU2 in our own system — not as a showroom piece, but as part of our daily listening.

What surprised us wasn’t the convenience. It was the engagement we felt.

Streaming began to feel less like background access and more like deliberate listening again — a meaningful complement to analog, not a replacement for it.

For a deeper look at how the MU2 reshaped our approach to digital, read our listening notes.

Why we chose to carry the Grimm Audio MU2

We approach digital components carefully. Not every DAC or streamer is something we want to offer clients.

To us, the MU2 stood out for:

  • System coherence and ease of integration

  • Engineering precision without clinical presentation

  • Long-term listening satisfaction

  • A design philosophy aligned with serious music listening

It represents what modern high-end digital playback can be when executed without compromise. This is the real thing.

Why the Grimm MU2 works in real systems

The MU2 isn’t just a DAC with streaming added. It integrates:

  • Roon Core functionality (optional internal storage up to 4TB)

  • Roon Endpoint capability

  • TIDAL Connect

  • UPnP rendering

  • A world-class FPGA DAC

  • A fully realized analog preamplifier stage

This means the MU2 can replace:

  • A separate Roon server

  • A standalone streamer

  • A DAC

  • And in many systems, a line-stage preamp

This kind of integration is huge for clients who want to reduce system complexity without reducing performance.

Interested in system matching or integration advice?

  • Contact us to discuss how the MU2 fits into your system and to discuss optional 4TB internal storage configuration

  • Scroll this page to explore more features, technical data and reviews

  • Explore more features below, and find full MU2 specs on the Grimm Audio website.

Frequently Asked Questions

  • Is the Grimm MU2 a Roon Core?

    Yes. The MU2 can function as a Roon Core and optionally includes internal storage for your music library.

  • Does the Grimm MU2 include a preamplifier?

    Yes. It features a fully integrated analog preamplifier stage and can drive power amplifiers directly.

  • Can the MU2 replace a separate DAC and streamer?

    In many systems, yes. It combines streaming, conversion, and volume control into a single chassis.

  • Does the MU2 include internal storage?

    Internal storage is optional. The MU2 can be configured with 4TB of internal storage, or used with external drives and network-based libraries.

Roon Ready DAC, Streamer & Integrated Preamp

The Grimm Audio MU2 is a reference-level DAC, Roon Ready music streamer, and integrated preamplifier — designed to serve as a complete digital front end for high-end systems.

The MU2 is not just a convenience device; it combines precision digital-to-analog conversion, advanced streaming architecture, and exceptional build quality in a single, elegantly executed component. Optional internal storage (4TB) is available for locally stored music, allowing the MU2 to function as a complete, self-contained source component.

For audiophile listeners looking for uncompromising digital playback — whether through Roon or other streaming platforms — the MU2 delivers a coherent, elegant solution in a single chassis.

Listening with the MU2

We have spent considerable time living with the MU2 in our own system — not as a showroom piece, but as part of our daily listening.

What surprised us wasn’t the convenience. It was the engagement we felt.

Streaming began to feel less like background access and more like deliberate listening again — a meaningful complement to analog, not a replacement for it.

For a deeper look at how the MU2 reshaped our approach to digital, read our listening notes.

Why we chose to carry the Grimm Audio MU2

We approach digital components carefully. Not every DAC or streamer is something we want to offer clients.

To us, the MU2 stood out for:

  • System coherence and ease of integration

  • Engineering precision without clinical presentation

  • Long-term listening satisfaction

  • A design philosophy aligned with serious music listening

It represents what modern high-end digital playback can be when executed without compromise. This is the real thing.

Why the Grimm MU2 works in real systems

The MU2 isn’t just a DAC with streaming added. It integrates:

  • Roon Core functionality (optional internal storage up to 4TB)

  • Roon Endpoint capability

  • TIDAL Connect

  • UPnP rendering

  • A world-class FPGA DAC

  • A fully realized analog preamplifier stage

This means the MU2 can replace:

  • A separate Roon server

  • A standalone streamer

  • A DAC

  • And in many systems, a line-stage preamp

This kind of integration is huge for clients who want to reduce system complexity without reducing performance.

Interested in system matching or integration advice?

  • Contact us to discuss how the MU2 fits into your system and to discuss optional 4TB internal storage configuration

  • Scroll this page to explore more features, technical data and reviews

  • Explore more features below, and find full MU2 specs on the Grimm Audio website.

Frequently Asked Questions

  • Is the Grimm MU2 a Roon Core?

    Yes. The MU2 can function as a Roon Core and optionally includes internal storage for your music library.

  • Does the Grimm MU2 include a preamplifier?

    Yes. It features a fully integrated analog preamplifier stage and can drive power amplifiers directly.

  • Can the MU2 replace a separate DAC and streamer?

    In many systems, yes. It combines streaming, conversion, and volume control into a single chassis.

  • Does the MU2 include internal storage?

    Internal storage is optional. The MU2 can be configured with 4TB of internal storage, or used with external drives and network-based libraries.

 

Main Features

High-Performance DAC

At the heart of the MU2 is Grimm’s discrete “Major DAC,” which incorporates FPGA-based filtering and noise shaping, achieving ultra-low distortion and jitter.

All-in-One Core Component

MU2 functions as your system’s digital hub: Roon Core + Roon Endpoint, DAC, analog preamp, and source switching are all built in.

 

Precision Engineering and Build

Solid, compact aluminum chassis (355 x 85 x 295 mm), ~ 35W typical power consumption (max ~70W) and five-year limited warranty with registration.

Analog Volume and Preamp

The MU2 provides stepped analog volume control via relays, enabling the unit to act as a true preamp for both of its internal sources and external analog inputs.

 

Roon-Native Experience

Ideal for users committed to Roon’s ecosystem, with no compromises in integration.

Storage and Control

Supports external USB drives and NAS storage. Optional 4TB internal storage available. Control via Roon, web interface, IR remote, or front panel disc + click/turn interface.

 

Technical Data

    • AES/EBU

    • Coaxial S/PDIF

    • TosLink (optical)

    • One balanced XLR

    • One Single Ended RCA

    • Balanced (XLR)

    • Single-ended (RCA)

    • 6.35mm for moderate drive

 

Reviewers

  • “If you want to hear the best digital music reproduction I’ve heard by an obvious and distinct margin, you’ll need to find a Grimm MU2 to listen through. That’s it, that’s my conclusion—the Grimm MU2 acting as Roon server, Roon endpoint, and DAC made music sound at once less processed and more fully fleshed out than other digital solution(s) I’ve had the pleasure of hearing. What’s more, the MU2’s analog volume control and line level inputs turned it into a wonderful sounding preamplifier to boot. All in one.”

    Read the entire review.

  • “The Grimm MU2 is a bang-up success. It combines cutting-edge digital processing and digital-to-analog conversion with a Roon Core and a remarkably transparent volume control and input/ output selector. It would be an ideal central element in a sophisticated stereo system in which streaming and file playback are the most important music sources but where other sources, analog or digital, are supported without compromise. The MU2 is not inexpensive, but it offers completely satisfying sound and flawless ergonomics. It is worthy of the very best amplifiers, speakers, and critical listeners.”

    Read the entire review.

  • “It has an incredibly quiet background and a deep, wide, layered soundstage with stunning holographic reality. Grimm’s in-house engineers created noise shaping and filtering technology to allow the micro details and fullness of sound to come to life. The pre-amplifier is so good that I do not use another one in the chain.”

    Read the award announcement as well as John Hoffman’s review of the MU2 for Stereo Times.