Too much of 3M coverage will make the SQ worse in my experience too. One has to be careful how to use it. I had a 3 or 4 inch strip plus a small square covered 1/2 of transformer fronting the display. It’s inside the P15 so I don’t remember anymore.
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My recent experiement of my PI streamer with the 3M sheet lead me to believe how much to apply and where is a balancing act like what Vmax said. Very system dependent.
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Me again. It’s hard for me to notice a difference on my PS 10 regenerator. Maybe it’s because I used the 4 Epluggs terminating plugs for the open sockets. As a result, the sound is already smoother and quieter. The effect is similar to a CAD ground box. The effect adds up with each plug. If I put a 3M sheet on my Melco S100 switch, the sound becomes warmer. I don’t notice any change on the Cambridge Edge NQ either. If I had to try something inside. The lid already has a similar shield. I made two tuning rings first. On the connection cable for the PS10 (Dragon HC with NCF Furutech connections. And for my LPS for the switch, Audioquest Hurricane source. Where else could I try it? Maybe a piece of 3M absorber in the power amplifiers in the area above the fuses and the display.
Maybe the most effective place ? Does it make sense to stick a piece of 3M foil in the XLR connectors, for example? Does it then have the same effect as a Furutech NCF connector? I ordered a Furutech Ultimate Cat 8 NCF Ethernet cable today. This is intended to replace the link-up between Develo magic Poweline and Streamer. Greetings Andrew
In my experience the 3M absorbent sheet does not work on interconnects and will for sure make it worse on speaker cables, but you may try it on a digital cable. In my case it works on a AQ Dragon48 HDMI, but not on other types.
Every system is different so I am not surprised that it does not make difference on your P10. Generally it works better when placing a narrow 3M strip (3" or less) behind the display screen area and also adding another piece (2x3 or similar) behind the strip to cover 1/2 of the transformer. I also found itc may be more effective to place small squares of 3M on top of each individual chip inside. But too many the SQ may become murky. Good luck in trying!
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Thanks for the tip about the chip’s Donald. Stimulated by the 3M sheet and the craving for optimization, I ordered a few things today. 
I deleted a second master first and a fiber optic connection of my wishlist. The fiber optic connection would be interesting if fiber optic internet was installed in the house on our street. At the latest then I will do the work to put a cable through the house. In order to get more peace and less noise, I first ordered a Furutech Lan Cat 8 NCF. This is intended to replace the link-up cat 8 for connecting the Devolo magic Powerline and the Melco S100 switch. Then, in my shopping spree, a Furutech Booster Brace and two Furutech FI-33 (R)NCF inlets slipped into my shopping cart.
The Booster brace is intended to protect the connection cable too the develo magic powerline and give the connector a better hold. Until then it is probably better to wait with the 3M blade optimizations.
https://6moons.com/audioreview_articles/furutech13/2/
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Nice! Hope these work out for you.
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I hope so too. Although after reading the second review.
There it is mentioned the more the better. And once I have a booster brace in my hand and see where it could fit. 
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The RF absorber is sensitive to milliliter moves. I found my bacch DSP negatively affected my preference with 3m absorber on the mini m1 after DSP measured
So I have to DSP without absorber then replace
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What use of the absorber do you mean ? The tuning ring? If 3 M absorber was stuck somewhere, it can no longer be changed so easily.
Today I noticed a change with the 3M sheet on the P10 regenerator. If I slide the sheet from front to back there is a point where the sound tilts slightly in the voices and becomes a little warmer/muffled. Is that it or do I have to pay attention to other effects? If I hold the leaf on the front of my amplifier above the display, the sound seems to be slightly brighter/more resolving. The 3M sheet on the Melco switch calms the sound slightly and makes a slightly warmer tone.
It is piece external to lid of Mac Mini. I had not stuck it down. It is obvious that the frequency level cancellation algorithm of BACCH DSP for the head transfer function might be too aggressive to my tastes. There are frequency band adjustments within Bacch DSP13 one can tailor, but I had not elected to play with them yet. It does show that RF and EMI can alter frequency response of our systems.
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Those are the type nuances one can hear. The size of sheet and movements as little as a millimeter can be very audible. Sometimes you can notice standing at the equipment. The tailor of sound is something you need to be sitting in the sweet spot. Using masking tape to hold pieces in place unltil you figure out what works and is helping without hindering is the key. It turns one into a skilled listener. The effects can be greater than a song streamed on Tidal vs one streamed by Quobuz through Roon. Quobuz easily beats Tidal for most people. The recent fidelity improvements on Tidal are only available through there streaming app but are to be made available in Roon.
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The 3M AB 7050 HF has its effect from 50 MHz. That’s 0.05 GHz, does it affect the Ethernet signal then? I applied small pieces in my P10 and a piece about 10x9 cm across half of the transformer. Tuning rings on the connection cable and on the cable for the LPS for the switch. A tuning ring about 1 cm wide on the DC cable of the LPS. Small pieces on the chips in the switch. The sound appears sharper with more depth and silence.
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Today I have a few Epplugs termination plugs to test. HDMI, USB and RJ45.
That’s when I came up with the idea of sticking a little of the 3M 7050 sheet into the Audioquest caps. My idea is that the absorbing effect eliminates high-frequency interference on the input ground.
How did this work for you? I have these caps on router and satellite only now. These devices are noisy and I wonder if 3m 7050 in caps will reduce noise, My system is down because MK2 was getting a transformer upgrade from JR now.
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I’m currently in the process of covering the caps with foil in the hope that it will help. Unfortunately, the borrowed Epplugs work quite well. I already have some for RCA analog and for power. Today I borrowed Epluggs for the digital part. HDMI, RJ45, USB A. Of course my dealer only had the high-end version of the Epplugs. In my own experience with the Epluggs for RCA, the high-end version also sounds more pleasant. Today my system sounded very good thanks to the latest updates, yesterday 3M for P10 and Switch and the Furutech Lan. Even better and tidier with the Epluggs. It seems the less noise in the system, the more detailed, sharper and realistic it becomes. The Epluggs are a kind of mini CAD groundbox with minerals, crystals and sometimes diamonds. Since they are smaller than a box, it helps more to use a cumulative effect. Perhaps the advantage is that they are directly on the device without a cable for a box that can also record other antenna interference. Of course I plugged them all in. I have to gradually remove the Epluggs and see which ones I miss the most. Everything determined. The RJ45 Eplugg on the switch sounds good, I now have it on my Devolo Magic Powerline. Maybe it will help even better there… one on the router/modem. I put the other Epluggs in the Edge NQ. Damn it sounds nicer and sharper…just a little closer to reality. You think that the man is at the finish line and then one person runs into another. I’m still waiting for delivery of the Furutech NCF Booster Brace and ICE socket
The individual steps are getting smaller and smaller but it is noticeable. I think if you remove all optimizations at once it is most noticeable. I get used to the new sound too quickly. And I noticed it most when I can listen to other systems. There are fewer and fewer that impress me compared to what I already have. I could be satisfied. But you also know this urge, Donald.
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Very interesting, I will check it out.
I am not able to find it in US, it may be only available in Europe.
The sound is decent. The tone is softer, there is less harshness and hiss in the highs. Bells and cymbals sound fuller but with more layers. Voices are easier to separate and sound more natural. The bass seems drier and more precise. There are no worlds, similar to the M3 slide, perhaps a little more the more Epplugs. I don’t know the difference with Luca’s CAD boxes and their influence.
Here is another manufacturer. It appears that he uses EMI protection like the 3M absorber sheet.
Sounds like you’re getting the tune of the absorber down. Place on capacitor they can change inductance and caused murky sounds. I am not clear about placement on caps. You mean plastic based I/O covers versus capacitors?