Grimm Audio MU1 Media Player



12-Month Special Financing**


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 Core 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

* Roon Core and Roon End Point integrated 
* 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 
* external USB and NAS storage, optional internal SSD 
* Tidal and Qobuz support 
* 355 x 85 x 295mm (WxHxD) 
* 5 year limited warranty

General Specifications:

  • Max. ambient temperature for operation: 50 °C. 
  • Fuse (worldwide): 630 mA fast blow. 
  • Weight: 4.5 kg. 
  • Dimensions: width x depth x height: 355 x 295 x 100 mm or 14” x 11.6” x 3.9”. 
  • Package dimensions: 536 x 392 x 219 mm. 

Clock specifications: 

• Internal intrinsic clock jitter 10 Hz). • Can slave to 44.1 kHz and 48 kHz based digital sources at 1FS, 2FS and 4FS +/- 50 ppm. • The output will mute for 80 ms when changing clock base rates.

Sample rate conversion with fpga processor:

• Upsampling of 1FS and 2FS files, streams and digital sources to 4FS or 2FS with “Pure Nyquist” decimation filter

• Downsampling of DSD64, DSD128, DSD256 and DXD files and streams to 4FS or 2FS with “Pure Nyquist” decimation filter

• Optional FPGA volume control on Digital 1 and 2 outputs: from 0 dB to -63 dB in 1 dB steps 

• Latency from digital in to digital out: 11 ms at 48 kHz.

Power supply:

• Mains voltage range: 90 – 240 V AC +/- 10% (50 and 60 Hz) 

• Power factor: > 0.98 

• Power consumption: Normal use 17 W, maximum 50 W.

Internal computer properties:

• Intel i3 CPU, > 2.4 GHz. • 2 cores, 4 threads, with Hyper-threading 

• 4GB DDR4-2133 RAM 2400 MHz. 

• 1000 Mb/s Ethernet 

• 2x USB 3.0 port

• Internal SSD for OS

• Optional internal SSD for music data storage.


• Full color TFT LCD

• 3.5 inch diagonal

• 480 x 320 pixels

Recommended Storage Options (not included);


SSD 2TB memory


SSD 8TB memory

Weight & Box Dimensions; 4.5 Kg  / 54x40x22 cm  (unit dimensions 355x295x100mm)

Included in box;  manual, AC cord, IR receiver cord

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Westlake Pro Card

No Interest if paid in full within 12 Months**

On qualifying purchases made with your Westlake Pro credit card. Interest will be charged to your account from the purchase date if the promotional purchase is not paid in full within 12 Months. Minimum monthly payments required.

**No interest will be charged on the promo purchase if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo purchase from the purchase date. The required minimum monthly payments may or may not pay off the promo purchase by the end of the promo period. Regular account terms apply to non-promo purchases and, after the promo period ends, to the remaining promo balance. For new accounts: Purchase APR is 29.99%. Minimum interest charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

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