Sold: HIFIMAN HE-R7DX+DROP+JM OCD MOD Closed-Back Modded By JM

Just built: 8 of 12 on 5-11-22
Just received these on Saturday 5--7- and I got to work on modding

I am charging $25 for the mod- I just want someone to enjoy the new sound of how a great modification can make even a $149 headphone from Drop sound.... refined much more than my first mod- this one adds a ton of stage and bass tightness-
Heavily Modified see pictures- sound tapers and focuses the now articulate bass, the mod of course extends the 3d sound stage and resonance frequencies of the original - the difference is now a VERY light headphone easy to wear comfortable headphone with spectacular dynamics and fuller more balanced sound and 3d space one that will rival $500 closed backs easily
nothing sounds shrill or cheap here at all- so the price is $149+25 for mod and $25 for shipping and tax I paid- Shipping in USA only - PPFF only- so $200 all in includes shipping

First one one to contact me gets this one of 12 very limited editions - It takes me 3 hours to make each one and a lot of raw materials to hand cut and place and test to make this head phone possible at an all in price of $200 friends and family pay pal price delivered anywhere in contagious USA - this is a very laborious project and I will keep making them until all my money is depleted or Drop stop making them- I paid full price and I am doing this as a labor of love to show people how the room sometimes matter more than the components-

Each Time I sell one edition here the ad will come down so not to break any head-fi rules so users can leave feedback both ways. I will then replaced the ad with a new one as I build another-
I do this not for a profit at all but for the love of headphone lovers everywhere- these headphones sound better than some $500-2000+ headphones as proven here by my first editions from actual end users here on headfi reviewed here- but with this new OCD edition I pull out all the stops to make it even better-

You can read more about the mysterious JM OCD mod here- https://www.head-fi.org/showcase/drop-hifiman-r7dx-jm-ocd-edition-mod.25830/reviews















layers of fiberglass shaped similar to a Fibonacci like pattern that make the image and sound stage sound much larger than even open backs - it’s a time consuming process - this non fabric design may just revolutionize all headphones designs and hopefully one day replace the use of typical fabric (figure a) which tends to mute certain frequencies -I can see this being the future of headphones and can replace all fabric in headphones with the fractal (figure c) fiberglass mutipatern actually helps bring all frequencies out and expand them (see image)
the pattern I created here actually de-accelerates the sound waves into a very spacious sound "meshing" unlike fabric which has a deadening narrowing effect (see diagram labeled planar surface a) - this mesh material tunes the sound waves and it comes alive due to their fractal nature- and allows pinpoint accuracy and a wider stage fooling the waves into a creating a larger than life pattern while minimizing any echo or ring in sound waves - it works better than fabric (the idea comes from using much more expensive porous/foamed aluminum similar to ones used on the back wave of the Abyss AB 1266 TC or the Meta Material used in front of the Dan Clark Stealth or the Meta material used in the KEF speakers)

Fractal surfaces: Generation and acoustic scattering prediction. https://asa.scitation.org/doi/10.1121/1.4783953​

this is the key to making headphones less in your head I think while not touching any frequency db (no muting)
quantum material

"Physicists discover new quantum electronic material - atomic structure resembling a Japanese basketweaving pattern, “kagome metal” exhibits exotic, quantum behavior."​

Reexamining the Mechanical Property Space of Three-Dimensional Lattice Architectures
http://faculty.washington.edu/lmeza...of-3D-Lattice-Architectures-LR-Meza-et-al.pdf