[Sunstealer]

Well I accidentally destroyed those Sony MDRED21, stabbed the clear film throughout the driver cover. I couldn't get a good fit either. I recabled some bundled Nokia HS23 with the B40 cable and the results are passable - male vocals a little honky but warm bass and a good fit for my ears. Rewired a pair of Samsung earbuds (from J cable to an old B&O Play Y cable) - bass-lite but good mids and treble.

MMCX modded a pair of B&O Play buds that were bundled with an LG phone - with a copper cable the results are great - mild sub bass rolloff, great mid bass, neutral mids and treble.

The NiceHCK B40 is an outstanding bud for the money - does anyone know what driver it uses? With double doughnut foams I get the best fit. Given the PK2 form factor, presumably I could slot in a 14.8mm PK1 driver (e.g. the 150Ohm PK1)?

 

[jogawag]

...
The NiceHCK B40 is an outstanding bud for the money - does anyone know what driver it uses? With double doughnut foams I get the best fit. Given the PK2 form factor, presumably I could slot in a 14.8mm PK1 driver (e.g. the 150Ohm PK1)?

I heard from Jim that the name of NiceHCK B40 driver is "PET Diaphragm Dynamic Driver" at the fukubukuro sale of the B40.

> Given the PK2 form factor, presumably I could slot in a 14.8mm PK1 driver (e.g. the 150Ohm PK1)?
The Yuin PK shell and driver size are slightly small than the B40 shell (or original docomo shell) size. So to slot in a 14.8mm PK1 driver needs a little extra glue.

 

[Sunstealer]

Thanks for the info. I've ordered some pk1/2 drivers and empty shells for experimentation.

 

[assassin10000]

The NiceHCK B40 is an outstanding bud for the money - does anyone know what driver it uses? With double doughnut foams I get the best fit. Given the PK2 form factor, presumably I could slot in a 14.8mm PK1 driver (e.g. the 150Ohm PK1)?

Not sure. Maybe these?
https://m.aliexpress.com/item/32973733570.html

Thanks for the info. I've ordered some pk1/2 drivers and empty shells for experimentation.

As @jogawag said, the B40 uses a slightly larger shell than most 14.8mm drivers fit. I have pics/measurements of the cheap $4-5 for 5 shells posted here:

https://www.head-fi.org/threads/diy-earbuds.822327/post-15707308

They can be made to work but it takes some effort.


If you want ones that fit most of the 14.8mm drivers, those shells are $20-25 for 3 pair.

 

[Sunstealer]

I had ordered 10 pairs of the non-original PK shells but have changed it to the 3 pairs that are more likely to fit the drivers I ordered:

150 Ohm PK1

32 Ohm PK2

Thanks again for your advice.

 

[assassin10000]

I had ordered 10 pairs of the non-original PK shells but have changed it to the 3 pairs that are more likely to fit the drivers I ordered:

150 Ohm PK1

32 Ohm PK2

Thanks again for your advice.

No problem. It's a small/niche market and not a well known possible problem.


That 150Ω PK1 is the vocal or mid/high centric and may be bass light. I haven't tried it personally though.


The well regarded (balanced or w/bass) redfilm 150Ω pk1 driver is sold out. One side of mine died recently. Anyone have 1 good redfilm PK1 driver they'd sell/trade?

 

[jogawag]

No problem. It's a small/niche market and not a well known possible problem.


That 150Ω PK1 is the vocal or mid/high centric and may be bass light. I haven't tried it personally though.


The well regarded (balanced or w/bass) redfilm 150Ω pk1 driver is sold out. One side of mine died recently. Anyone have 1 good redfilm PK1 driver they'd sell/trade?

I found two pages selling red film 150Ω pk1 driver on Taobao. The first page seems cheaper.
https://item.taobao.com/item.htm?id=572623588063
https://item.taobao.com/item.htm?id=569489997267

 

[assassin10000]

I found two pages selling red film 150Ω pk1 driver on Taobao. The first page seems cheaper.
https://item.taobao.com/item.htm?id=572623588063
https://item.taobao.com/item.htm?id=569489997267

Hmmmm. I've never bought from Taobao. Might be worth the risk if I can find a good service.

 

[furyossa]

No problem. It's a small/niche market and not a well known possible problem.


That 150Ω PK1 is the vocal or mid/high centric and may be bass light. I haven't tried it personally though.


The well regarded (balanced or w/bass) redfilm 150Ω pk1 driver is sold out. One side of mine died recently. Anyone have 1 good redfilm PK1 driver they'd sell/trade?

Yup. "RedFilm" is the best 14.8mm DIY driver on Ali. Only Chitty's store and DIY Earphone Tribe Store has this driver but 32ohm version.
https://www.aliexpress.com/item/32776696327.html
https://www.aliexpress.com/item/32251985660.html
They have a 150ohm model but with a shell. Maybe these people from the Chitty's store want to sell it separately as a kit, like DOCOMO shell and PK2 driver.
PK1 and PK2 sound great in DOCOMO shells.

 

[assassin10000]

Yup. "RedFilm" is the best 14.8mm DIY driver on Ali. Only Chitty's store and DIY Earphone Tribe Store has this driver but 32ohm version.
https://www.aliexpress.com/item/32776696327.html
https://www.aliexpress.com/item/32251985660.html
They have a 150ohm model but with a shell. Maybe these people from the Chitty's store want to sell it separately as a kit, like DOCOMO shell and PK2 driver.
PK1 and PK2 sound great in DOCOMO shells.

Already contacted chitty's store, the listing is up but 'out of stock'. I asked and they have none currently, no ETA.


How is the 32Ω pk2 redfilm driver? I've got it in my wishlist but haven't ordered it.


I will say so far that N55 64Ω is my 2nd favorite 14.8mm driver after the Redfilm 150Ω PK1 driver.

 

[jogawag]

Hmmmm. I've never bought from Taobao. Might be worth the risk if I can find a good service.

Taobao can only speak Chinese, so even if I used Google Translate, it was very difficult when I was in trouble.

https://www.tokopedia.com/
https://www.bukalapak.com/
https://shopee.co.id/
Searching with the keyword "yuin pk1 150 red film driver" on the above Indonesian website seems to sell it at many stores.
If you can ask a DIY member in Indonesia to purchase for you, this method may be safer.

 

[willyboyaudio]

Taobao can only speak Chinese, so even if I used Google Translate, it was very difficult when I was in trouble.

https://www.tokopedia.com/
https://www.bukalapak.com/
https://shopee.co.id/
Searching with the keyword "yuin pk1 150 red film driver" on the above Indonesian website seems to sell it at many stores.
If you can ask a DIY member in Indonesia to purchase for you, this method may be safer.

DIY member in Indonesia here

 

[assassin10000]

Hi Friends, especially @robar and @GREQ -
I think I've successfully gotten rid of the excessive hump around 2-4kHz on my previous posts. I still use the V7 as the baseline, and note that I include my measurement from two months ago, which is fairly consistent with the new measurement, so that's a good thing. I took three measurements for each earbuds and show the averages only.

Traceless is from NiceHCK: https://bit.ly/3g2Ruf9
Clear Blue is my own creation: https://willyboy.home.blog/2020/06/27/clear-blue-diy-earbuds/

Any comment and input are welcome. Thanks!

Mind sharing how you tamed the 2-3khz area?


Also what is your measurement setup? Anyone else that has measured earbuds, I'd be interested to see what you use. I'm considering buying or making one.

 

[Sunstealer]

Yup. "RedFilm" is the best 14.8mm DIY driver on Ali. Only Chitty's store and DIY Earphone Tribe Store has this driver but 32ohm version.
https://www.aliexpress.com/item/32776696327.html
https://www.aliexpress.com/item/32251985660.html
They have a 150ohm model but with a shell. Maybe these people from the Chitty's store want to sell it separately as a kit, like DOCOMO shell and PK2 driver.
PK1 and PK2 sound great in DOCOMO shells.

I've cancelled the DIY Tribe order for the time being as I am getting a little overwhelmed with all the combinations! I've earmarked the 32Ohm red film, the 32Ohm Bass, 40Ohm Titanium from NSC and now the GHX N55 64Ohm. I like an overall warm but not dark sound with smooth treble and plenty of mids. Rather than buy a premade 3.5mm pair I like to MMCX mod the shells so I can swap all my cables around and go balanced (which is my preferred mode).

When the AE description says "fever", what does that mean?

Still waiting for my Edifier H180 for the shell fit. I think these have a 15.4mm driver on a 16mm shell? I bought a digital caliper so I can check for myself.

I used taobao once for a DX220 case and it was a real pain. Lots of different steps that were arcane in nature. Never again.

 

[Slater]

When the AE description says "fever", what does that mean?

Fever means bass, but take it as a grain of salt. It’s usually just marketing fluff.