Build an earphone with Sennheiser IE800 shell and B&O H5 dynamic drivers

[edit] I created a new v2 post at https://imgur.com/a/d1iZa60 with more details and pics.
and in v3, I plan to use a 7.8mm XWB (extreme wide band) Sennheiser driver with 5~46.5KHz FR.

AMA on Reddit post, which would be easier for me to trace... Imgur message is also fine but no guarantee instant reply...

https://www.reddit.com/r/DIYHeadphone/comments/8mmxtj/build_an_earphone_with_sennheiser_ie800_shell_and/
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And hope I'm making this post a technical discussion, as either imgur nor reddit does not want them to be transaction platform...
PM EarphoneDIYLabs in Reddit or message me on imgur, AMA about DIY headphones, hopefully DIYer's technical questions to make life better :)
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As I'm getting too many question, this FAQ is for common question I'm seeing in comments. Sorry for not being able to answer one by one.

[FAQ 0] budget
As many persons reply and ask for cost, my spent on this kit is ~$45 = 10 + 2*10 + 10 + 5 = shell + 2* drivers + cable + soldering tin with 4% silver

[FAQ 1] How to ensure cable being durable
A: my experience is the glue and the quality of the cable/jacket is the key. For DIY cables with open ends, you can pick those with Nylon strings inside. And you may use strong A/B glue to ensure all joint glued firmly. And always use a gold plated, strong connector, which won't cost few $ more.

[FAQ 2] Why B&O drivers?
A: Start from a driver is so much lower cost than teardown a real H5 :)
And I experiments on different 6.5mm - 7mm drivers, so far this is the best combo. I'll experiment more and will keep you updated.
the key is to find either the best sound quality, or the best ROI.

[FAQ 3] About warrant
A: as long as DIY, there is no warrant and all risk is on your own... I made a few mistakes before showing this post in other builds. So please proceed with caution and wish you good luck. But really. there is "no pain no gain", to me, taking risk in DIY is part of the fun.

[FAQ 4]the glue
E8000 glue is mostly recommended, and you can find everywhere on Amazon or Ebay. E8000 is for sealing the gap around the dynamic with the front cover.
J-B glue is recommended to glue the ceramic back cover and the front cover, E800 won't work with ceramic at all. Again, you can find J-B glue everywhere on Amazon.
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"Sennheiser's original IE800 in-ear headphone was debuted five years ago, which was a super comfy, extremely open, natural sounding phone... It's designed and hand-made in Germany.... The new IE800 S features a single 7mm driver mounted in each ceramic ear piece; impedance is rated at 16 ohms. It comes with a rather deluxe looking real leather travel case. I like ... the injection-molded ceramic ear pieces looked snazzy in high gloss metallic grey, but the IE800 S' ear pieces are finished in a more subdued satin grey. Sennheiser isn't making any great claims about sonic differences between the two models, other than to say the IE800 S' 7mm drivers are redesigned. The IE800 S retails for $1,000, £870 and AU$1,600, while the original IE800 is still listed on Sennheiser's website at $800, £560 and AU$1,200."

Quote from CNET which perfectly recap my mind. Can we DIYers hand-made it? This build is a very interesting yet unique combination of Sennheiser IE800 ceramic shell with B&O H5 6.5mm drivers. The budget is very low cost effective to <$50.

See following reviews on B&O H5 earphone from headphonereview.com "how do they sound? Unsurprisingly considering the fact that this is B&O, they sound great. Let’s start with the bass, which is extremely strong and powerful. The headphones offer plenty of bass that should be enough for even mega-bass fans, and while some might find the amount of bass a little much, it generally sounds quite good here, especially on bass-heavy songs. It also adds a little extra oomph to non bass-heavy songs, like AC/DC’s Back In Black."

I'm a big fan of DIY earphones and headphones. AMA about how to make these babies!

You will need a pair of Sennheiser IE800 shells, B&O H5 earphone 6.5mm dynamic drivers , a DIY earphone cable with a 3.5mm jack. I picked one of same color and texture as IE800.
You will need simple tools like knife, soldering iron, glue. Note I used to recommend E8000, but this time the shell is ceramic and can not be glued by E8000. I used A/B glue instead.

You will need a pair of Sennheiser IE800 shells, B&O H5 earphone 6.5mm dynamic drivers , a DIY earphone cable with a 3.5mm jack. I picked one of same color and texture as IE800.
(PM me if you need a source )
You will need simple tools like knife, soldering iron, glue. Note I used to recommend E8000, but this time the shell is ceramic and can not be glued by E8000. I used A/B glue instead.

take a close look at the shell, the backend (the bigger part holding the dynamic driver) is ceramic and the front end (the smaller side in to ear) is metal. Love these tiny and shinning staffs :)

change an angle to have clear view.

the cable with 3.5mm jack

this is a pair of B&O H5 driver, repairing spare part.

the 2 rings on yellow paper is buffer ring, sticky on both sides.

Step 1: put the buffer ring on the front end (the side with many holes) of the dynamic ring.

Proceed with caution, and do not block hole on the front

Almost done...

Glue the driver into the front cover. Be very careful not to left the glue over on either front or back of the driver.

Done! Stay 15min until the glue sticky and strong enough.

Each back cover has 2 tiny holes. Put on the stainless steel bead, apply a tiny little bit glue. the ceramic back cover is just shining and amazing!

You will need to push a little bit hard to fix beads in...

Now both front and back covers are done.

Stick the anti-dust net to the front cover
E8000 glue is fine for this step.

Step 2: wiring and soldering.
Note the sequence of wiring...

Put on the protective jacket to the cable first.

Important notice: fix the dynamic driver on the vice clamp before soldering!!!! Don't get the little baby killed but you mighty soldering iron.

Double confirm you have done so...

Now it's the time to test your soldering skill - the driver is 6.5mm an soldering panel is as tiny as sesame seed...

Note I did a WRONG wiring here !!!! the red/yellow wires shall be reversed!!!

Also notice the wiring sequence.

Note I did a WRONG wiring here !!!! the red/yellow wires shall be reversed!!!

Last step, glue front and back covers together, put into the vice clamp and hold for 30min

And now you have it!

I bet it can beat any $150 in-ear headphones. Here is my subjective feeling about the sound.
1. the brightest mid and high frequency I have ever heard, very close to the style of my grado ms1.
2. solid bass and full of resilience, unlike Beats Studio whose bass deep dives too much and lose control.