[jogawag]

What this even mean?

I'm sorry I didn't notice the photo on the page I linked to.
My guess is that it shows that the "Redfilm" 150ohm PK1 drivers have different ranks of quality and different prices.

 

[furyossa]

I'm sorry I didn't notice the photo on the page I linked to.
My guess is that it shows that the "Redfilm" 150ohm PK1 drivers have different ranks of quality and different prices.

Probably. For now, I know only for 32ohm and 150ohm version. We need someone from China to translate these symbols

 

[Luis1316]

Probably. For now, I know only for 32ohm and 150ohm version. We need someone from China to translate these symbols

From left to right: 80 RMB, 40 RMB and 20 RMB. It only states about the price of those drivers, there isn't any mention to ohms.

 

[furyossa]

From left to right: 80 RMB, 40 RMB and 20 RMB. It only states about the price of those drivers, there isn't any mention to ohms.

In most cases the difference in impedance dictates the price so the higher the impedance the driver is more expensive.
But this is not the case for new PT2021 buds

 

[vygas]

In most cases the difference in impedance dictates the price so the higher the impedance the driver is more expensive.
But this is not the case for new PT2021 buds

I've genuinely been thinking to buy another pair but in 365ohms just to see if they're doing the same resistor trick shoonth does.

 

[jogawag]

@Into The Light5, sorry for the confusion.

The real pk1 redfilm driver is 150ohm.
But when I saw on the first page you showed ( https://m.tb.cn/h.4sfvf6a?sm=a27cfd ) that the pk1 redfilm is 32ohm, I thought it was suspicious, so I recommended the pk1 redfilm 150ohm version.

However, when I took a closer look at that page, I saw that a very large number of buyers gave it good reviews, so it might be a good one.

 

[captione]

Some interesting stuffs
So far I didn’t know there were 4 types (maybe more) of covers with metal mesh lids
It would be great if someone from the DIY store did an analysis of how each of these covers affects the sound by using the same driver

https://www.aliexpress.com/item/1005002109234653.html
https://www.aliexpress.com/item/1005001551703132.html
https://www.aliexpress.com/item/1005001724594715.html
https://www.aliexpress.com/item/1005002341769623.html

Next we have two shells, one can be used for sleeping buds for sure and other for some high impendance driver

https://www.aliexpress.com/item/1005002341806436.html
https://www.aliexpress.com/item/1005002603900431.html

And the drivers:
new one Beryllium film ie Bery composite
https://www.aliexpress.com/item/1005002610937602.html

old-school (Japanese)
14.8MM Fengda Driver: https://www.aliexpress.com/item/1005002544712174.html
15.4MM Fengda Driver: https://www.aliexpress.com/item/1005002544742010.html

and weird one
14mm 30Ω Ti: https://www.aliexpress.com/item/1005002500579003.html
16mm old-school (reminiscent of old Philips SHE7750): https://www.aliexpress.com/item/1005002344857206.html

Those 15.4mm "Fengda" drivers are the OG old batches of the first MX500 drivers (big solders) that I posted recently.

 

[furyossa]

Those 15.4mm "Fengda" drivers are the OG old batches of the first MX500 drivers (big solders) that I posted recently.

Yup. They look like they were taken from some old model

 

[earfanatic]

I have finally built the long docomo mods I wanted.
The 32 ohm titanium driver is really good, since I managed to install it in the original docomo grille.
notes:
-the titanium drivers have a STRONG magnet, that seems even stronger when not covered with the metall grille
-the docomo plastic grille was fine (original, not the crappy fake I bought) but the inner diameter had to be increased
-now it is like a hidden gem. Looks like the original, but it sounds fantastic: i could not stop listening first (despite a draining battery and an urge to visit the toilet)

I also tried the biofibre driver, with a small trick I managed to put it together.
While the titanium sounds better than the PK2, the biofibre is only different. I could not yet decide what to like more.

I decided to make illustrations how to do these:

 

[earfanatic]

And the biofibre mod:

 

[furyossa]

Yup. Yup. Nicely done Also post photos of final build

 

[earfanatic]

Here are the actual photos.
The biofibre is still with "external tuning"
Both of them snaps on nicely without glue, and recabled with the Aipinchun LC-OFC cable with L plug.

The blue piece I tried painting, I think it is a nice addition on this shell that could be personalized.
I wll try nail paint next time on it.

 

[assassin10000]

I'm sorry I didn't notice the photo on the page I linked to.
My guess is that it shows that the "Redfilm" 150ohm PK1 drivers have different ranks of quality and different prices.

From left to right: 80 RMB, 40 RMB and 20 RMB. It only states about the price of those drivers, there isn't any mention to ohms.

In most cases the difference in impedance dictates the price so the higher the impedance the driver is more expensive.
But this is not the case for new PT2021 buds

It's actually not different impedance. Further down the seller describes the 40rmb drivers as being sold by other sellers that has a cheaper/poorer quality driver with a less deep in color 'red'. Let alone the even cheaper 20rmb ones. He says the ones with the best bass response are the 80rmb ones.


Which completely makes sense as the diy pk1 redfilm 150Ω have the best sub-bass extension of the 14.8mm drivers I've tried.

 

[furyossa]

Which completely makes sense as the diy pk1 redfilm 150Ω have the best sub-bass extension of the 14.8mm drivers I've tried.

Without doubt. I don't know why it's so difficult for other Ali stores to get this driver.
There used to be even a few pre-assembled models on sale and a driver separately and due to the great popularity everything was sold out

 

[Into The Light5]

Hello, ive read about the sr2 pro driver, but then i stumble upon this, different store, same name, physical different, also is the pro version stand only for cables variance?

which one is the original sr2 pro driver?