The Grimm Audio MU1 is a reference-level digital music player for hi-fi systems that demand precision, flexibility, and simplicity. Acting as a dedicated streamer, Roon Core, and digital transport, it delivers exceptional timing accuracy and musical coherence—while allowing you to pair it with the DAC of your choice.
Built around Grimm’s proprietary field programmable gate arrays (FPGA) architecture and ultra-low jitter clocking, the MU1 is designed to deliver the cleanest possible digital signal to your system.
Dedicated Streamer with Integrated Roon Core
The MU1 functions as a complete Roon Core, managing your music library and streaming services without the need for an external server.
The MU1 can be configured with optional internal storage (4TB) for local music libraries, or used with external drives and network storage depending on system preferences.
Think of it as the central hub of a modern digital system—replacing multiple components while maintaining reference-level performance.
No separate music server required
Eliminates additional streamers
Removes computers from the signal chain
Reference-Level Digital Playback
Grimm’s custom FPGA processing and precision clocking minimize timing errors (jitter), preserving the structure and flow of the music.
The result is a presentation that feels stable, natural, and highly resolved—where imaging, tone, and timing remain intact.
Designed for DAC Flexibility
Unlike Grimm Audio’s MU2, the MU1 is a pure digital source, designed to pair with the DAC that best suits your system.
With high-quality AES/EBU and S/PDIF outputs, it integrates easily with a wide range of DACs.
Ideal for systems with an existing DAC
Supports long-term system flexibility
Allows for tailored digital-to-analog conversion
Ultra-Low Jitter Clocking
In audio, “clocking” is the synchronization of multiple digital audio devices to a common time reference, ensuring they operate at the exact same sampling rate.
Clocking is central to Grimm’s design philosophy. By reducing timing errors at the source, the MU1 improves imaging precision, transient clarity, and overall musical coherence.
Purpose-Built Design
The MU1’s compact, precision-machined enclosure reflects a minimalist, function-first approach. Its operating system is stable and quiet, and purpose-built for audio.
Why Choose Grimm Audio
Grimm Audio’s background in professional audio means their design approach focuses on timing accuracy, signal integrity, and system simplicity.
The result is a digital front end that prioritizes musical coherence over unnecessary complexity.
Contact us to discuss how the MU1 fits into your system and to discuss optional 4TB internal storage configuration
Scroll this page to explore more features, technical data and reviews
Find full MU1 specs on the Grimm Audio website.
Why Buy from Fern & Roby
As an authorized Grimm Audio dealer, we help ensure the MU1 is properly integrated into your system.
We take a listening-first approach to building systems, and assist our clients with:
DAC pairing and system matching
Network and streaming setup
Storage and library configuration
System optimization
The MU1 is rarely a standalone decision—we’re here to guide the full system.
Frequently Asked Questions
Do I need a DAC with the MU1?
Yes. The MU1 is a digital source and requires an external DAC.
What is the difference between the MU1 and MU2?
The MU1 is a digital-only streamer, while the Grimm MU2 includes an integrated DAC and preamp (we love the MU2, read Christopher’s listening notes).
Can the MU1 replace a Roon server?
Yes. It includes full Roon Core functionality.
The Grimm Audio MU1 is a reference-level digital music player for hi-fi systems that demand precision, flexibility, and simplicity. Acting as a dedicated streamer, Roon Core, and digital transport, it delivers exceptional timing accuracy and musical coherence—while allowing you to pair it with the DAC of your choice.
Built around Grimm’s proprietary field programmable gate arrays (FPGA) architecture and ultra-low jitter clocking, the MU1 is designed to deliver the cleanest possible digital signal to your system.
Dedicated Streamer with Integrated Roon Core
The MU1 functions as a complete Roon Core, managing your music library and streaming services without the need for an external server.
The MU1 can be configured with optional internal storage (4TB) for local music libraries, or used with external drives and network storage depending on system preferences.
Think of it as the central hub of a modern digital system—replacing multiple components while maintaining reference-level performance.
No separate music server required
Eliminates additional streamers
Removes computers from the signal chain
Reference-Level Digital Playback
Grimm’s custom FPGA processing and precision clocking minimize timing errors (jitter), preserving the structure and flow of the music.
The result is a presentation that feels stable, natural, and highly resolved—where imaging, tone, and timing remain intact.
Designed for DAC Flexibility
Unlike Grimm Audio’s MU2, the MU1 is a pure digital source, designed to pair with the DAC that best suits your system.
With high-quality AES/EBU and S/PDIF outputs, it integrates easily with a wide range of DACs.
Ideal for systems with an existing DAC
Supports long-term system flexibility
Allows for tailored digital-to-analog conversion
Ultra-Low Jitter Clocking
In audio, “clocking” is the synchronization of multiple digital audio devices to a common time reference, ensuring they operate at the exact same sampling rate.
Clocking is central to Grimm’s design philosophy. By reducing timing errors at the source, the MU1 improves imaging precision, transient clarity, and overall musical coherence.
Purpose-Built Design
The MU1’s compact, precision-machined enclosure reflects a minimalist, function-first approach. Its operating system is stable and quiet, and purpose-built for audio.
Why Choose Grimm Audio
Grimm Audio’s background in professional audio means their design approach focuses on timing accuracy, signal integrity, and system simplicity.
The result is a digital front end that prioritizes musical coherence over unnecessary complexity.
Contact us to discuss how the MU1 fits into your system and to discuss optional 4TB internal storage configuration
Scroll this page to explore more features, technical data and reviews
Find full MU1 specs on the Grimm Audio website.
Why Buy from Fern & Roby
As an authorized Grimm Audio dealer, we help ensure the MU1 is properly integrated into your system.
We take a listening-first approach to building systems, and assist our clients with:
DAC pairing and system matching
Network and streaming setup
Storage and library configuration
System optimization
The MU1 is rarely a standalone decision—we’re here to guide the full system.
Frequently Asked Questions
Do I need a DAC with the MU1?
Yes. The MU1 is a digital source and requires an external DAC.
What is the difference between the MU1 and MU2?
The MU1 is a digital-only streamer, while the Grimm MU2 includes an integrated DAC and preamp (we love the MU2, read Christopher’s listening notes).
Can the MU1 replace a Roon server?
Yes. It includes full Roon Core functionality.
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