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...





I think that any music lover’s solution to hearing their favorite songs should be easy, and seamlessly, integrated into their own physical environment. 

Not much in high end audio is easy and seamless. Why should streaming be any different?

“Both Phoenix products are absolutely fantastic with the Zenith Mk3 though.”


They were designed specifically to enhance performance of entire Innuous line except their flagship - Statement. Their incompatibility or adverse effects with any non-Innuos products is not at all surprising to me.

Thanks for answering my question @nyev!

Also, in case anyone is interested, the SOtM sNH-10G has been running in and I tried it again today with the same results. However I tried alternating between LEDs on and off and lo and behold the highs and details returned with them turned off. Hallelujah!

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@arafiq ​​​​@lalitk .  The Linkup ethernet cable is interesting to me if it beats my Supra cat 8.  There are two versions; 22 AWG and 26 AWG.  I assume it is the 22 AWG you are using?  Thanks!  Trying a new NA Muon AES Cable tonight, comparing to my K-S Elation.  Still using the Aries G2.1 and waiting on my Grimm!

Soon!  I am planning on putting the Grimm MU1 in my main set up, running 
Roon Core and AES into my Tambaqui.  My other system and bedroom endpoints will be on the network.