Sold: DROP+HE-R7DX JM OCD Extreme Stealth Edition
Listing ID: 26178 Views: 299
149.00 USD
Condition
New in box
Negotiability
Firm
Ships to
  1. United States of America



4156082

THIS SHOULD HELP WITH TOP HEADPHONE PERFORMANCE WHEN GAS PRICES AND FOOD PRICES ARE SO INSANE!

Just received these on FRIDAY (yesterday) 5-20- 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


I went OCD EXTREME STEALTH
THE craziness of perfection never ends at My House of Mods...
proud and embarrassed a tiny bit to announce the BRAND NEW:
JM OCD Extreme Stealth (SE) mod which is EXTREME in every way... the result is it increases weight in grams BUT controls the bass like never before - and now the cups are as inert as they can be - controlling frequencies like a $1000- 2500 headphone ez maybe more- the cups are inert and as solid as I could make them
Treated both inside and out with heavy heat resistant heavy duty sound liner while using a stealthy technology of hand cut custom fiberglass mesh in dual layers-

The silver medallion on the outside is what allows more interior space while still providing a dead silent with nearly zero cup resonance - but its like I said an extreme stealth mod similar to the pictures below but taken to the next level entriely! IT TAKES ME 3 HOURS to make this -





4155672







4155293







2.jpg















4131586













4131588













4131591















4147010







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)






Untietled.png














4FA35041-3B1D-4415-AF44-FE781ABFA441.jpeg








4147011

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."









1Untitled.png








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









E4FB6CEE-1890-43F7-AB9A-EBFCFC80AA03.jpeg
















24B1EE96-8414-4CF0-AEB3-11898B6C5EE1.jpeg
















BFDF3A8A-09CE-4ECD-97C6-4517DBE22B9E.jpeg














B0B92BC0-0F46-45C3-885C-FB4E4C633380.jpeg


13.png

B84C0135-C021-4C88-833F-B89E0721313B.jpeg




These take a long time to test and make perfect
everyone I ship is hand tested after 3hrs of assembly of the mod and hand signed on the right ear cup and numbered and hand signed on each box ensuring they are 100% as good as they can possibly be before I ship
Listed by: John Massaria (28)
Listed: 2022-05-22
Last edited: 2022-05-22
  • Drop_HEModedJMEdition.jpg
    Drop_HEModedJMEdition.jpg
    36.5 KB · Views: 0
  • 1653248910704.png
    1653248910704.png
    43.3 KB · Views: 0
  • 1653248957574.png
    1653248957574.png
    34 KB · Views: 0
  • 1653248989239.png
    1653248989239.png
    91.8 KB · Views: 0
  • 1653249130827.png
    1653249130827.png
    158.2 KB · Views: 0

John Massaria

Member of the Trade: JM Audio Editions/Headphone Modifications
I like sales but the 3 hours it takes to do this mod and ship in USA and pay taxes is cost prohibitive I would think - stock they sound good modded they sound like $500-$2500 gifts from heaven - it’s perfected now and ready - I number the editions after and test them after mod and compare each one to the best version mod to make sure they sound same - I will say after doing this there are a lot of quality differences they make at Hifiman- if they don’t seem right I won’t even mess with them - I reject and send back to Hifiman because they don’t meet my high standards - each one I send out has my signature on em and on box and I know they are 100%
 
Last edited:

John Massaria

Member of the Trade: JM Audio Editions/Headphone Modifications
sold if anyone wants more I need to be contacted they take a log time to make right
 
Back
Top