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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
nyev OP
1,031 posts
 

I too was told by Innuos that the Pulsar was not finalized due to parts shortages. In late December Nuno Vitorino said that there was no launch date and that it would be a long time in the future. I wonder if they had to redesign the unit around more available parts like Antipodes did. @ghasley , maybe your reviewer friend had a pre-production sample? Also, unlike past Innuos devices the Pulsar does have have a AES output. Yes, I agree it is a very interesting product! But would require me to keep my Zenith as you said, if I wanted to keep server capabilities and I do.

Also @ghasley , again you guys in the US are lucky with lower taxes and duties - FAR lower - than us Canadians. Depending on the item we can be charged 25% of the value of the item when it shows up at the door! And you’ll never know exactly how much it will be when it shows up. This is the reason many dealers won’t ship demos to Canada.

It’s true I can fall into an over analysis pattern when going down an audiophile rabbit hole. It’s happened with cabling. In some cases it can be stressful because I’m not entirely sure I trust myself with the extremely subtle differences I’m hearing. But so far in this case that’s not happened, and it most certainly isn’t stressful! It’s been eye-opening in the best possible way. The reason why: the differences between my N20 and Innuos gear are blatantly obvious! Two totally unique presentations. It’s when I’m in a situation where I’m splitting hairs that things can get dicey, and that’s not needed in this journey - so far at least!

After 2.5 days of run-time on AES, so far there is STILL absolutely zero difference between AES and USB that I can hear. Speaking of reading up in advance, I was looking forward to some benefits here hopefully, but nope. Everything still sounds very good though!

I was thinking last night that I’d enjoy the N20 if it was my only choice and I had to keep it forever. I’d also be consistently be aware of the missing top end transparency and air, but despite that it simply connects with music better than the Innuos for me. For the record - I hadn’t read any of these traits in advance of noticing! :). And yes, I’ve absolutely read up extensively on the MU1 and the K50. When researching I tend to discount one-off comments, but when you hear a small army saying the same things, I do pay attention then. Knowing that I still could be the odd one out due to my system or tastes!

 

 

 

ghasley
2,489 posts
 

@nyev 

Also, unlike past Innuos devices the Pulsar does have have a AES output.

My friend has the Pulse in house, which does have the multiple flavors of digital outputs. The Pulsar will be USB only.

 

Have you considered bringing in a different dac? I’m not suggesting you consider buying a different dac (although I would LOL), what I am suggesting is you bring in a different dac to confirm the streamer/server differences (or lack therof) are a function of the server/streamers rather than your dac board. If it were me, I would bring in an exceptional dac with an inboard streamer that is readily available in Canada. For instance, a DCS Bartok/Lina or even a Meitner MA3…both should be easy to get on demo in Canada. You would learn a couple of different things. You could see how the other dac sounds direct connect to the server/streamers. Additionally, you could see how it sounds using its inboard streamer. Lastly you could determine the real world delta between your inboard dac and a purpose built dac.

charles1dad's avatar
charles1dad
10,250 posts
 

@ghasley 

My friend has the Pulse in house, which does have the multiple flavors of digital outputs. The Pulsar will be USB only.

Those very favorable comments from the reviewer/ friend were about the Pulse? That is very encouraging. to know. Also wise of Innuos to offer it with connection options as well.

Charles

 

ghasley
2,489 posts
 

@charles1dad 

@nyev 

Those very favorable comments from the reviewer/ friend were about the Pulse?

My apologies for mistyping earlier, I meant to type that my friend has the Pulse.

nyev OP
1,031 posts
 

@ghasley you are right, the Pulsar is stated as being USB only!  I am fairly sure that before the delay of the Pulsar, the specifications for it were posted on the Innuos site along with the specs of the other two Pulse products.  And, I could have sworn that the Pulsar used to list AES as an output in its specifications section that no longer exists.  Not saying I’m certain about this, but if I’m right it would signal that a redesign of the Pulsar is in fact underway to deal with parts availability issues (that Innuos directly told me they were having with respect to the Pulsar).

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