Machina Dynamica New Dark Matter CD and Blu Ray tray treatment?


This is a set of adhesive-backed thin plastic pieces that one attaches to one’s transport or player disc tray. The disk rests on them during non-spin mode, but presumably don’t touch the applied thin pieces during playback mode. The company says the new Dark Matter pieces reduces background scattered light from reaching the photodetector, thereby improving performance. 

Anyone tried this product? Please specify transport or player if you have and your impressions. 
128x128Ag insider logo xs@2xcelander

Showing 31 responses by geoffkait

aolmrd1241756 posts02-14-2019 11:27amI made the decision that ndm is not going to make the grade in my system.Just to dark sounding for my tastes. If you own a cd player that is a bit aggressive in the treble region,this may be just the ticket for you.

>>>>That’s weird, everyone else hears more air, more shimmering sparkling high frequencies, much more information and much better bass performance. Oh, well, I take the sweet and sour. 😝 Every system is different. 😬

Let’s not forget, there are many reasons some people don’t get the results they were expecting with tweaks, generally speaking. 
calabder, yes, the NDM will eat your CDs, destroy the magnetic clamp and ignite your transport, causing it to explode in a massive radioactive fireball. So, yes, you’re right to worry.

mapman15,663 posts
02-09-2019 11:40am
Bad behavior is bad behavior. Most will and should give benefit of the doubt and accept apologies for bad behavior if offered. Otherwise if it walks like a duck.......

Being funny in the process does not transform dishonesty and contempt into something acceptable. It is just a further form of dishonesty and contempt.

Sorry not buying it.

>>>>What on Earth are you ranting about now? 
ieales284 posts02-11-2019 11:57am@millercarbon:
Since no one mentioned the science, the LED light is focused and polarized. By design, it takes care of all this "green sharpie" style nonsense on its own.

>>>>>Huh? Nobody said the CD laser (it’s not an LED) is not focused or polarized. Specifically the laser is a “Quantum well.” The reason the CD laser beam is focused is because it’s coherent light. Polarized light would not be immune to the Green Pen, anyway. It’s the wavelength of the light that’s the issue. 
It was actually the big ol’ Bumblebee 🐝 that had the reputation it was too heavy and it’s wings too small to fly. Kind of like the Space Shuttle, the Flying Brick 🧱 
celander OP890 posts02-11-2019 2:57pmYeah, I worry about using these thingies in a magnetically-clamped top-loader set up. Seems like doom and gloom would arise. This sort of post should cause Geoff to arise and speak about the perils.

>>>You worry too much. NDM is not magnetic. Why would you think it was? Fear of the unknown? Besides, don’t you think a magnetically clamping device is inherently a very bad idea. Hel-loo! NDM is suitable for all CD, DVD, SACD, BLU RAY players with trays or top loaders. I’m not trying to set the world on fire, just start a flame in a few hearts.
michaelgreenaudio
This isn’t the end of the story because what I was missing several years ago is something I have always made a part of my life’s work but somehow wasn’t able to read between the lines because I was trying to understand two people in particular through my eyes instead of theirs. My moto is "everything affects everything else" and as much as I understood this with Tuning in the case of Geoff and May I wasn’t grasping this humanly. On one side I was faithful to both of them and on my own did the experiments they suggested. When I was asked about the results I gave a faithful account. When not asked I didn’t volunteer but still did the testing. I did the listening tests because it’s important to me to be in the know. I don’t necessarily care about someone else’s physics...

>>>>>>It may may amuse you to know, I don’t know, maybe it will surprise you or even shock you, but back in those halcyon days over on Stereophile whenever May sat at her computer composing her posts Peter Belt was sitting right next to her. May is like an animal when she gets going. You were lucky to come out of it in one piece. 🐥
Peter Belt passed away almost two years to the day at the age of 87. Both Peter and May are the nicest most generous people you ever want to meet. There is one thing though, they are quite confident and not at all shy when arguing sound and audio.  Peter Belt was more like Michael Green than one would imagine since before he got involved with things that go bump in the hight he was a designer in the high end audio industry in UK, in particular ortho something speakers. They were both most generous in allowing me to use their ideas many times. I am probably their biggest fan, in fact I’m quite sure of that. There’s a whole other world, waiting out there. A world perhaps best suited to the more adventurous audiophile. 😛 The last time I looked Peter Belt’s Cream Electret and Silver Rainbow Foils were on Stereophile’s Recommended Components.

Yeah ten thousand dollars, go have some fun
Put it all on at a hundred to one
Hang fire, hang fire, hang fire, put it on the wire, baby
Doo doo
Doo doo, hang fire, hang fire put it on the wire
Hang fire, hang fire, hang fire, hang fire
Put it on the wire, baby
Put it on the wire
That’s very good, stevecham. But why is the sky blue? If our vision falls off after 625 nm how can 650 nm be visible red? 

Pop quiz: what color is a Blu Ray laser?

part 2: what’s the complementary (absorbing) color for the Blu Ray laser scattered light? 
I totally get it. You’re tone deaf AND color blind. But you’re probably lucky in love. 🥰
Let me ask you straight up, glubson. Have you been dipping into the brownies again? 
For top loaders: If you don’t have enough clearance for the 1/32” NDM between the data side of the CD and the transport surface above which the disc is spinning there’s something wrong with your CD player. Furthermore, even if there isn’t enough clearance, which I doubt, the NDM will be effective ANYWHERE inside the CD transport compartment since the scattered light is filling up the entire space inside the compartment, lighting it up like a Christmas tree. NDM is not limited to the gap between the disc and the transport.
celander OP904 posts02-16-2019 11:18pmThe difference George is that he doesn’t believe in his own snake oil.

“The trick, colander, is not minding that it hurts.” - Lawrence if Arabia 🐪
Everything you need to know about NDM is on my main web page, top of the page. 
The active NDM material, the small Super-thin squares, is not adhesive so Super-thin double-sided adhesive is necessary to attach the NDM to the upper surface of the CD tray. Total thickness NDM + double-sided adhesive less than 1/32”. Bingo Bango Bongo!
thecarpathian172 posts03-02-2019 3:43pm@geoffkait, on my way to Theater Camp this morning, I found myself wondering if the material you use relies on surface plasmon resonances?

>>>>>>Hmmmmmm....very interesting. 😳
A quantum well is a potential well with only discrete energy values. The classic model used to demonstrate a quantum well is to confine particles, which were originally free to move in three dimensions, to two dimensions, by forcing them to occupy a planar region. The effects of quantum confinement take place when the quantum well thickness becomes comparable to the de Broglie wavelength of the carriers (generally electrons and holes), leading to energy levels called "energy subbands", i.e., the carriers can only have discrete energy values.

The CD laser is an example of a Quantum well, for which particles are confined in two dimensions. The laser beam is emitted from the open, unconfined dimension when the Quantum well is excited by electrical stimulation. The active ingredient in the Intelligent Chip - Quantum Dots, I.e., “Artificial Atoms,” for which particles are confined in all 3 dimensions to the (nanoscale) de Broglie wavelength. A torrent of Photons is emitted in a chain reaction when the quantum dot is stimulated by external energy such as a laser.
The NDM needs to be close to where all the action is as the objective is to reduce the power of the scattered light inside the transport compartment below the level that can be detected by the photodetector which is 75% of full reflected beam. It’s more straightforward in front loaders because you can see, as you said the NDM is right where all the action is. However I think as anywhere inside the transport compartment should be OK. The entire transport compartment is lit up with scattered light, even though most of it is invisible.
By the way, I harbor no hard feelings toward George at all. He’s probably a good egg in the long run, that is if you like long runny eggs.
I didn’t mean to imply 8 or 10 are magic numbers. But I did find out it can be overdone. That discovery was made on a classified system. The moral of the story is more is not better. It’s not necessary to cover the entire tray surface. The NDM is currently going out with 10. Subject to change without notice. Your patience is appreciated.

I now think 8-10 is great, less might be equal to or......

I see only 6 squares/rectangles in your photo of the top loader. Am I missing something?
I just heard from customer X who told me his big Acoustats sounded great with 9. His big system, the classified one, has 11. I’m not saying 8 or 12 won’t be just as good.

You might try the two new ones farther away from the laser - near the outer boundaries of the transport surface. Since scattered light gets emitted out the outer edge of the CD. 
I believe the words he used were subtle but powerful. He also mentioned that the Grateful Dead Best Of guitar work sounded amazing.