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...

 

 

nyev

@fastfreight I see that you are selling (or have sold) your Aries G2.1/Sean Jacobs.  I'm guessing you're impressed with your Grimm MU1....I was wondering if you can share how the sound improved from the Aries/SJ combo to the Grimm.  Thank you in advance.  

Hello @calgarian5355   the Aries with the SJPS is very very good.  The Grimm is even more detailed, but much more easy and relaxing.  Not sure if it really is more detailed, but it is just so easy to listen to I hear more.  People say more analogue;  I do not have vinyl, but it is more relaxed and any harshness disappears.

 

“I now realize at the start of my journey my Innuos gear was not the weak point in my digital chain. It was my Diablo 300 DAC module, which won’t be a surprise to some.”
@nyev

Not surprising at all. Those who have been down this path already knew Gryphon DAC is your weakest link. And this not to say, the onboard DAC is bad or average. For most part it is good enough but you now know having done the comparison with two different outboard DAC’s, the limitations of an onboard DAC. Once you experience something better it’s hard to go back. For me, the Cost vs Performance debate doesn’t carry much weight, maybe it means more for price conscious minds. Once you’re on a pursuit of nirvana, C vs P argument takes a back seat. And it is strictly for the end users to decide/dissect the worthiness of performance upgrade. Heck, I went from $25K DAC to $45K, do I hear a jump in performance worth extra $20K…NO, but I fell in love with the nuances and subtleties brought to the presentation by my $45K DAC. To me, that was totally worth it and the end game upgrade. Now I am looking forward to streamer upgrade. That’s been my approach of building my system over the years by focusing on one component at a time.

You are on your way to building something very special that will give you years of joy and goose bumps. The cost of all that joy……priceless.

@lalitk , well stated.  All of those diminishing returns can add up to something special.

To be clear, I wouldn’t say the Merason DAC-1 performed better than the Diablo 300 DAC module.  It simply had a different, more neutral presentation that I preferred.  The Tambaqui actually did perform better than the other two DACs, but it should at twice the cost.  Between the DAC1 and the Tambaqui, which do I  like better?  It’s actually pretty close, even though they have totally different presentations.  The DAC1 is a no-fuss, inviting, engaging DAC that I think most would enjoy.  The Tambaqui adds detail and transparency though out the frequency band, but somehow is not bright or lean in my system and is musically engaging and maintains excellent coherence through complex musical passages.

My MU1 just got better. For the first time I tried removing the Innuos PhoenixNET from the chain and connecting the MU1 straight to my wall’s Ethernet outlet. Wow! Things got a bit cleaner, less restrained, a tad fuller and more immediate. And now it’s got a bit more of that presence I noted my Innuos gear does well.

The PhoenixNET really seems to help in some configurations (and when it does the effect is magical…). But maybe the MU1 is doing enough on the Ethernet input already? Anyone know what features the MU1 incorporates that may cause the PhoenixNET to be redundant?

Down two boxes now lol (no external reclocker and no Ethernet isolation/regeneration switch)!

In the manual Grimm says to please don’t use specialty “audio” Ethernet cables with “claimed benefits”. I know it’s typical for vendors to use generic power cords, but I thought this was interesting. I’m using an Audioquest Diamond Ethernet cable. At some point I’ll compare with a standard Ethernet cable.