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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 Contraol
Supports external USB drives and NAS storage; optional internal SSDs Control via Roon, web interface, IR remote, or front panel disc + click/turn interface.
Technical Data
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AES/EBU
Coaxial S/PDIF
TosLink (optical)
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One balanced XLR
One unbalanced XLR
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Balanced (XLR)
Single-ended (RCA)
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6.35mm for moderate drive
Reviewers
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“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.
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“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.
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“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.
