By the way, the shape of the double layer of 3M material looks fairly rectangular. If you get a chance to measure it I’ll cut some pieces and put it a short distance away from the Apple Logo on the mini. Towards the front right?
I should be home this afternoon. I will do some measurements to get it dimensions more precise The double layer placement that works best for me on the M-1 Mini is this. If upu place it higher on the apple insignia it tilts moreto the higher frequencies. But the below picturef arrangement give highs and mids just right and strong and solid bass with perfect balance and depth. If you move higher on the apple it tilts highs too much with two layers of 3M AB7050HF.
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Look at that messy piece of tape. Let me peal it off, toss too, so we can see the full logo in all of its splendor. lol
Sound. O-o-oh Did I do dat? 
Merry Christmas.
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Notice dog teeth marks in it.
My cavalier king charles Spaniel left. I named him Charlie Chaplin soon after changed to be known as “Chucky”! Which he also comes running.
He is also helpful in capturing and killing rats outside that venture into the yard for acorns. He is good at bringing whatever treat he finds and leaving them by your shoes or slippers. Including 3M absorber treats. I am figuring he is part Rat Terrier. So one must take care of guarding the doggie door and monitoring it.
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Thanks @Vmax - I had an unused UpTone UltraCap LPS (set to 12v) that I connected to the BabyFace Pro this morning. I’m very happy with the results - I appreciate the suggestion.
I’m a bit reluctant to modify the M2 Mac Mini at the moment (still under warranty I believe). If Al modifies his and is blown away by the difference, I’ll likely rethink my position.
Now where did I put that 3M sheet…?
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The Mini LPS conversion and the 3M absorber mod offered the most notable improvements. The double layer absorber on M-1 chip is most earthshaking.
But i did both LPS mods with the Ghent Gotham DC power cords at same time. I am running 2 meter DC power cords so they need lots of shielding due to length susceptibility of RF and EMI.
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I have unopened Ghent Gotham DC cables in a drawer. They don’t have the ends I need though. Hmmmm. Can I trust that the power supply manufacturer knew what they were doing with the stock cables?
With DC, very highly recommend taking care the polarity coming out at the tip is right. There is no standard for the outputs from LPS units themselves. So some cables will be right, others not, to give the powered device the right input it needs not to fry.
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@Vmax I’ve got a 3M sheet in hand so I’ll probably start with that. I’m going to assume the location for an M2 Mac Mini will be similar to what you have determined for the M1 model (at least that seems to be a good place to start). You bought your Mac Mini LPS mod kit on eBay, correct?
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Always good ro try to measure. Also if LPS does 240 or 120v Input the fuse for 120v must be double. Sometimes they ship a switchable fuse or mix up configuration they sent you. The bigger double size fuse is for 120v.
@ViperRGD and @aangen Here are some approximate sizes and placement. I am working slightly handicapped and on some good medication. So your placement may take tweaking as long as M2 Chip is close in size to M-1. It is ear tunable. Then redo your head tracking filters.
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Did the dog decide the final size and shape?
It was my sloppy use of remnants. Dog ran off with it. Two pieces stick together sloppily. Strangely it sounds less good with rhombus pointing other direction. Might be just my system but the square ones never sound better. It shall remain a mystery until he gnaws it in two or forced to cut up a new sheet with glue that’s not expired.
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Two decimals of size precision?
Clearly my plastic ruler game is lacking! Can I borrow your dog? 
Thanks for the template!
Update:
DAC issue solved. Life is grand!
I reset the DAC to factory. I reduced its output from 6 volts to 2 volts. And in Roon I changed from 32 bits max to 24 bits max.
I wonder if Roon was upsampling to 32 bit. That would be awful! I find the use of ANY Roon signal processing to be abhorrent to me.
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We are patiently waiting for the BACCH upgrade we ordered, going from the into version to the Audiophile version, and will soon be able to hear the difference ourselves.
What is the sonic difference between the Audiophile DSP version and Adio SP unit?
A fine question.
I think they are very close. I don’t believe I have a strong preference for one or the other sound wise.
I do prefer the adio for it’s variety of inputs and its internal clock.
The interface with the B4M is really fun.
All in all I believe you are in for a pleasant experience.
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A new adventure with my Bacch4Mac setup. I ran cables from my phono preamp to ports 3&4 on the BabyFace Pro. I knew I needed the external Mixing application to enable the inputs and set the input level. I figured I knew what the M and S buttons were for. I was right, kewl. The M button mutes the input. The S button is for selecting just that one input, muting others. A one click savings.
(I actually may be wrong about this but it works swell as described.)
But it took a bit of study to figure out how to enable those inputs with the BACCH software. But I got it.
I listened to side A with the BACCH. Now I am listening again without any digital gear in the very clean all analog path. It is nowhere near suffering.
I miss my adio and it’s still here. Bah.
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Happy New Year, everyone!
Glad to announce this:
(Best viewed on a computer browser. For mobile devices, view in landscape mode).
Edgar
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Awesome and Happy New Year!
Science is the way forward.