Grimm Audio MU1 - Digital Music Source
Best high-end streaming source for dedicated Roon audiophiles.
The GRIMM Audio MU1 redefines digital music playback, offering an unparalleled listening experience. This sophisticated source combines a powerful Linux computer, an in-house FPGA interface, and an ultra-low jitter clock to eliminate audible distortions. It serves as a Roon Core server and network player, delivering exceptional clarity whether connected to Grimm LS1 speakers or other high-end DACs. Its minimalist aluminum chassis houses advanced processing for pristine audio reproduction, making it a benchmark for digital music sources.
$12500.00
Owner Satisfaction
4.8
/ 5
Category Rank
7
/ 493
#7 in Stereo Music Streaming Devices
Price vs Category Average
+232%
Above average
Dimensions
35585295
/ x x mm (WxHxD)
Who it's for
- Listeners demanding the highest fidelity from every digital file
- Roon enthusiasts wanting a dedicated, high-performance music server
- Audiophiles seeking absolute signal purity and timing precision
Who should skip it
- Casual users wanting a simple plug-and-play audio setup
- Budget-conscious buyers looking for high-value audio solutions
- Minimalists preferring an all-in-one streaming and DAC system
Performance breakdown
Jitter suppression
Ultra-low jitter clocking delivers near-perfect digital signal integrity.
Roon integration
Seamless server and endpoint performance for the ultimate Roon experience.
Build quality
Minimalist aluminum chassis offers robust protection and timeless aesthetic appeal.
Processing precision
Proprietary FPGA architecture ensures pristine, distortion-free audio conversion.
Operational silence
Fanless design eliminates mechanical noise for a completely undisturbed listening environment.
Connectivity versatility
Comprehensive digital I/O options accommodate a wide range of high-end setups.
Key Specs
Dimensions
355 x 85 x 295mm (WxHxD)
Internal Clock Jitter
< 0.6 ps RMS (> 10 Hz)
Processor
Intel NUC board with Core i3
Digital Outputs
AES3 XLR, Coaxial S/PDIF
Digital Inputs
AES3 XLR symmetrical, S/PDIF coaxial or optical
Connectivity
RJ45 Ethernet, USB-A ports, IR sensor jack
Storage
Optional internal SSD support up to 8TB
Latency
11 ms at 48 kHz (digital in to digital out)
Features
- Integrated Roon Core server and endpoint
- Ultra-low jitter clock for superior clarity
- FPGA processing for precise audio conversion
- Fanless operation for silent performance
- Supports multi-channel 5.0 playback
- Digital inputs undergo reclocking
- Optional FPGA volume control
- Minimalistic, high-quality aluminum chassis
What customers say
The Grimm Audio MU1 earns exceptional praise as a reference digital source that dramatically elevates high fidelity audio. Reviewers consistently focus on its sonic transparency and accuracy, attributing this to proprietary clocking technology derived from professional studio expertise. Users report significant gains in soundstage definition and musicality when integrating the MU1. Its seamless and stable Roon integration is a major convenience factor. While the build quality reflects its premium positioning, the high cost is the main consideration. Ultimately, the MU1 is recognized by serious listeners as a foundational component capable of delivering the pinnacle of digital playback performance.
Know before you buy
Yes, the MU1 features an integrated Roon Core server, meaning it can manage your music library and stream directly to your system without needing an additional computer.
The MU1 is a digital source, not a DAC. You will need to connect it to an external DAC or active speakers, such as the Grimm LS1, via its AES3 or S/PDIF digital outputs.
Any digital signal connected to the MU1's inputs is reclocked through its ultra-low jitter clock and FPGA processing, which effectively cleans up the signal before it reaches your DAC.
Yes, the device is designed with a fanless architecture, ensuring it operates in total silence regardless of the processing load.
The MU1 supports internal SSD storage up to 8TB, which can be configured to house your local music library for quick, reliable access.
The MU1 relies on a wired Ethernet connection to ensure the most stable and high-fidelity data transfer, as it does not include built-in Wi-Fi.
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$12500