My new LCD-X phones do this from the left driver. Audeze assure me that it’s okay, and nothing to worry about. This is an copypaste from their site.

"Since air is trapped between your head and the diaphragm it creates a pressure zone, and as the headphones shift with movement you may hear a slight crinkling sound from the diaphragm. This is a normal occurrence with planar magnetic drivers and is nothing to be concerned about, it’s the sound of the thin diaphragm moving back and forth with the changes in air pressure.

Sometimes as the driver film stretches slightly with age, the sound can become more apparent, and sometimes it may also lessen again. This is mostly influenced by factors in your environment (such as temperature and humidity), and we don’t have much control over whether or not this occurs.

One important note is that we strongly recommend exercising certain cautions when handling planar magnetic headphones: trapped air can create high pressure and sudden pressure changes could damage the diaphragms, and this is not covered by warranty. The same is true when you put the headphones on or take them off-- it’s not a good idea to press them hard and fast against the head, so we recommend slow and steady movement to allow the air pressure to stabilize."

Take a look at Custom Cans. I believe they may offer you what you need.

For an amp. The xDuoo MT-602 will drive them very nicely.

LCD-X, xDuoo MU-601 and xDuoo MT-602 sat on my desk for gaming and music listening. Sick little setup that takes up 0 space.

They are super heavy at first. Ensure the strap and yokes are perfectly adjusted to your head and the weight will disappear. I have a super small head apparently and the smallest adjustment on the yoke is not enough and the strap is too long so it touches the metal band out of the box for me. Not as problem as you can shorten the strap which fixes the issue. It’s been around 2 weeks now since I bought the LCD-X and I would like them to be lighter but the weight is no longer an issue and I can wear them all day without worry. I use them for music and gaming.

I haven’t tried the Sundara mod, but I have tried their DT990 mass loading and damping mod and it made a massive difference so I can vouch for their work.

What does the term ‘High Resolution’ mean for you?

LCD-X

How much do you have to spend on an amp? 100?

I have the MT-602, and can’t stop thinking about buying this one. Is there really much point in me getting this one? I guess 4 tubes rather than the 2 tubes I have in the 602, will give me more amplification, which I don’t really need, however does it add more ‘tubeyness’ to the sound?

Check out customcans in the uk. They supply everything you need in a kit. You can also send it to them and they will do it for you.

Ah okay. Just for future reference, if you’re using a realtek chip. There is Realtek software than can help with hard to drive headphones. Anything 60 ohm and under will be deemed easy to drive by the driver and will go into low performance mode. In this software you can change the amplification level to better suit harder to drive headphones. This might have provided what you required but it seems like you’re still on the hunt for the right pair of headphones. Also you should totally get a dac and amp setup. Have a look at the Xduoo MT-602 for amplification.

Have you checked the realtek console software is installed?