
The MU1 is the ultimate digital music source. Combined with the LS1, it forms a peerlessly elegant High-End audio system.
We wanted to develop the most accurate audio source we could imagine. In our experience, the human hearing system shows an incredible sensitivity to anomalies. Even unimaginably small aberrations appear to be audible. In principle, digital audio does offer perfect reproduction. Its sonic quality, however, is limited by the implementation accuracy of the physical and mathematical laws that affect the conversion from one format to another. Grimm Audio strives to bring you confidence that all technical details are taken care of to the greatest extent so that the reproduction system steps out of the way of the music.
“The MU1 is the ultimate digital music source: attractive, reliable and precise”
With the MU1, our goal was to set a new benchmark in music player design. The Linux-based computer system brings solid data integrity. Our in-house-designed FPGA interface board, which forms the heart of the MU1, offers breakthrough performance levels in format conversion and receives automatic updates whenever we have pushed the boundaries again. Needless to say, the MU1 features our trademark ultra-low jitter clock. This is a music player worthy of the name Grimm Audio.
Once excellent sound quality is ensured, the quality of a music player is then defined by the user experience. For this, we partnered with Roon Labs, who in our opinion are in the lead when it comes to a rich and engaging music experience that appeals to your whole family. The MU1 runs the Roon Server, so no extra installs are necessary. Just pick up your tablet and experience the music. For customers who prefer to only run a simple playback system without Roon’s extras, we will offer a solid alternative.
The MU1 combines seamlessly with the LS1 playback system. Of course, the virtues of the MU1 can also be realized with DACs from other manufacturers. Because we love to create a stunning look for our equipment, the boundlessly versatile system is housed in a cabinet of minimalistic elegance, so the MU1 will easily become the gem of your living room.

MU1 features
- Roon Server integrated (up till 100k tracks)
- ultra high up- and downsampling precision
- ultra low clock jitter
- seamless integration with LS1 series
- excellent source for 3rd party DACs
- all sample rates and formats supported
- surround playback option with 6 digital output channels
- AES, spdif and optical digital stereo inputs
- web control of setup via any browser
- infrared remote control
- external USB and NAS storage, optional internal SSD
- Tidal and Qobuz support
- 355 x 85 x 295mm (WxHxD)
- 5 year limited warranty
MU1 downloads
- Download the Grimm Audio MU1 leaflet pdf
- Study the MU1 “Pure Nyquist” filters blog
- Read the MU1 Quick Start manual pdf
- Read the MU1 Software manual pdf
- Read the MU1 Hardware manual pdf
- Read the MU1 Roon backup manual pdf
- Check the MU1 known issues FAQ
- Read the MU1 Firmware Change Log pdf
- Read the MU1 Update Instruction sheet pdf
MU1 Reviews
- Twittering Machines: MU1 in favorite gear 2023
- Twittering Machines: MU1 is musically breathtaking
- HifiPig: 5 Hearts for LS1be & MU1
- WAM: MU1 shows how far digital has come
- HifiCritic: MU1 pushes the emotional buttons
- Audiophile Style: 5 stars for MU1
- Lowbeats: MU1 opens up new musical worlds
- Steve Huff: “MU1 is Digital Nirvana”
- AudioKey Reviews: Diamond Award for MU1
- Hörerlebnis: “LS1be, SB1 & MU1 shake the audiophile worldview”
MU1 News
- Twittering Machines selects MU1 as review reference
- MU2 demo at Axpona 2024
- Grimm Audio exposure at Montreal Audiofest 2024
- MU1 firmware update v1.5.9
- MU1 firmware release v1.5.5
- Two rooms at Dutch Audio Event 2023
- MU1 firmware update v1.5.1
- Ultimate Stream video interview with Eelco Grimm
- HVT: LS1 and MU1 are iconic products
- New MU1 firmware v1.5.0