Grimm MU1 Streamer - Really "The Best"?

I've recently become interested in the Grimm MU1.  While reviews of top end players from Innuos, Aurender and Antipodes and others are typically all very positive, the tone of the many pro reviews of the Grimm MU1 go far, far beyond, with some reviews resorting to using superlatives and gushing of positive system transformation and not being able to stop listening to material, etc..  HiFi Advice and Steve Huff (actually calls it "magic") have such reviews.

Given the delay in availability of the Innuos Pulsar which I'm told will be better than my current Zenith Mk3 + PhoenixUSB reclocker, I am interested in replacing my streaming setup with a one-box solution that includes a high-precision clock.  The new streamer will continue to feed my Gryphon Diablo 300's DAC module, which I have no interest in replacing.

I'm actually a fan of Innuos, after they improved the sound of my Zenith with firmware updates and after I added their PhoenixUSB reclocker. I appreciate this commitment to improving sound quality which is why I was so interested in the Pulsar.

The trigger for considering an upgrade is not for improved sound, but rather, to solve some issues I have with too many Audioquest power cords coiled and clumped together. I will get to lose one of them and one of my USB cords with a one-box streamer. I've noticed my sound is very sensitive to positioning of my AC cords and find I often need to re-adjust the PC feeding my amp to get proper sounding vocals at center stage.  One of my subs also seems to be picking up AC noise when the crossover is set above 60Hz. The second trigger is simply system simplification, removing one box.  All that said I don't really have any complaints regarding sound, and the PhoenixUSB reclocker truly did improve the sound of my Zenith.

While the Grimm MU1 has it's 4X upsampling up it's sleeve with reviewers absolutely glowing over this feature and it's extreme ability to separate tones to the left, right, front, and back far better than the rest, I don't see that Grimm has gone to any lengths with regard to power supply management in the way other brands do including Innuos. The MU1's ultra-simplistic interior doesn't bug me, but the lack of transformers and power management makes me wonder....

Are there any updates from folks who have directly compared the MU1 vs similarly classed streamers from the competition?  Did you find it to be as revelatory as the pro reviewers found it? And, how does it compare to other streamers with it's 4X upsampling disabled?  Does it sound like it suffers from it's lack of power management?  I do see that the clock should be very good...





Do you think it is important for the switch and cable to burn-in even when the digital signal isn’t transmitting through them?



I went all-in on the switch, special caps/silver wires etc. My Ethernet cables are simple Certified Blue Jeans cables. But the only difference is addition of the switch plus another certified Blue Jeans cable.

Thanks for the insights. I thought this was relevant to the conversation since @nyev is using the PhoenixNET switch, and also observed less detail etc when using an N20.


I cannot answer your question from experience, but I've read many accounts of those who are streaming files from hard drives have experienced better sound quality with improved Network cables and switches. I don't understand why, but I believe them as I put significant stock in personal experience.

The way I would burn in the switch is just to stream music 24/7 for at least a few weeks; so just leave your streamer playing even if it is on another input. That is the fastest way to get through the burn in process and I've done it many times recently and in the past.

I would suggest that you also consider trying some other Network cables. This is based on my reading here and on other forums where a few people have found that while the BJC stuff is decent, you can do better. Here's a cable that is $38 and is quite good, Lalit will attest to that as well. LINKUP - [GHMT & DSX8000 Certified Cat8 Ethernet Patch Cable S/FTP 22AWG Double Shielded Solid Cable | 2000MHz 2GHz 40Gbps | 5th-Gen Ethernet LAN Network 40G Structure Wires |Yellow| 1 M (3.3ft) : Electronics I use it throughout my system and it beat three other value products I tried. I do not have any experience with the more expensive Network cables, but many here do.

Thanks for all the advice everyone.

Looking forward to reading more about @nyev’s audio journey!


+1, @pokey77 

The LinkUp LAN cable is a **new** reference for high performance digital systems without the high dollars price tag. Anyone putting together a streaming system, should audition this cable. The only caveat, the 22AWG version cable is bit stiff so no sharp bends. If you need flexibility, try the 26AWG version.