[wagyuA5]

Attention nail polish is semi-permanent and not permanant
I use bondic UV Pen for this and to stick the tubes to the drivers but there are other alternatives of course

Thanks for the tip. The bondic pen looks handy

 

[stegeoc]

I'm sorry but which Samsung model we are talking about? I didn't realise Samsung offered something similar to the Sony Just ear. And the UE Fits use 10mm dynamic drivers only so they are not hybrid AFAIK. Just want to make sure we are on the same page here.

I'm thinking about building my first CIEM, 1DD+1BA hybrid, no crossover, pure acoustic tuning. Already got my ear impressions done, both open mouth and relaxed mouth. Though I need to get one of those 711 couplers.

The Sony Just ear project is helmed by chief engineer Tomohiro Matsuo, one of the top sound/headphone engineers in Japan (if not the world). So I don't expect to get anywhere close to what they've achieved. Matsuo-san was not a big fan of 3D printing tech but I do have access to 3D printers myself so I can fiddle with internal acoustic structures, just for the fun of it. I know what caps, resistors and dampers do but still a bit of a layman in tuning. It will be appreciated if someone can point me to a place where I can learn some more acoustic tuning techniques especially for IEMs.

Did you get any further with your hybrid plans? I've not used a DD before but picked up a couple and am curious to see what can be done.

The drivers I have don't have a spout but do have a metal casing and maybe a 3mm hole in the middle, so I'm thinking of gluing a 3mm ID tube on them, step it down to 2mm and treat them like BAs (no 3D printer for anything fancy in the shell). Presumably a small hole in the shell is needed for venting but other than that are there any major differences in how you treat a DD to a BA?

 

[AsciiJC]

Heya head fi friends!
I have a single DD iem thats fully 3d printable in resin and FDM! I would absolutely love some feedback to those curious about this, as it hosts only 10mm drivers currently. You are able to edit the design so whatever you desire as well. Just would love some feedback!
https://www.thingiverse.com/thing:5411333

 

[stegeoc]

That looks interesting, but not able to print anything and try. It seems that 3d printing like this is perfectly suited for dd designs. I guess that the lack of examples on here of people using DDs in colloid based shells should probably be a warning..

Keeping an eye out for a Mars 3 but currently no stock anywhere near me

 

[swtnate]

That looks interesting, but not able to print anything and try. It seems that 3d printing like this is perfectly suited for dd designs. I guess that the lack of examples on here of people using DDs in colloid based shells should probably be a warning..

Keeping an eye out for a Mars 3 but currently no stock anywhere near me

The Saturn is AWESOME. Same as the Mars but a MUCH larger build plate for producing batch amount of parts.

 

[mattmatt]

Hey guys, just wondering if you guys have an idea what driver can be a replacement for UE's TrueTone drivers. It seems like a WBFK without a spout but a top firing one similar to CI-32139 and FED-26849 from Knowles. I'm rebuilding a UE for my friend because he is complaining about an imbalance with turns out is caused by a failed driver.

 

[tomekk]

top firing WBFK-33649, difficult to buy during the Chinese lockdown and in single quantities

 

[mattmatt]

top firing WBFK-33649, difficult to buy during the Chinese lockdown and in single quantities

Doesn't the 33649 have a spout? Is there a specific model? Can you link me to one?

 

[tomekk]

Doesn't the 33649 have a spout? Is there a specific model? Can you link me to one?

Unfortunately there is no documentation on google indexed, you would have to ask the knowles for the data sheet. For sure 33649 is without spout and the construction of this wbfk is identical to the ue18+

It's hard to buy, you should have to get the minimum 25*palette through some distributor or wait for mouser stock. These days it's probably better to put 2x2*2389 half coil and make mod to UE 18 ver 1.0, or replace one driver to 30095 (cut the spout by scalpel) or both sides to 30095+UE wbfk.

 

[arxyu]

My friend and I want to try something crazy and we came up with this idea:

What if we make 2 DD drivers face each other, reverse the polarity of one of the driver and high pass it. And maybe add a very small resistor to the other one to solve the phase issue or something idk. Would that give us a clean and aggressive HF cut?

a quick 3d model to demonstrate our idea:

Has anyone tried this idea?
If yes please let me know the result, thanks a lot!

 

[mattmatt]

Unfortunately there is no documentation on google indexed, you would have to ask the knowles for the data sheet. For sure 33649 is without spout and the construction of this wbfk is identical to the ue18+

It's hard to buy, you should have to get the minimum 25*palette through some distributor or wait for mouser stock. These days it's probably better to put 2x2*2389 half coil and make mod to UE 18 ver 1.0, or replace one driver to 30095 (cut the spout by scalpel) or both sides to 30095+UE wbfk.

hmmm weird, mouser's documentation for this is the whole 3000 family. https://www.mouser.com/ProductDetail/Knowles/WBFK-33649-000?qs=BJlw7L4Cy7%2BcFIha2UVLlQ== and this has spout on it

 

[Xymordos]

My friend and I want to try something crazy and we came up with this idea:

What if we make 2 DD drivers face each other, reverse the polarity of one of the driver and high pass it. And maybe add a very small resistor to the other one to solve the phase issue or something idk. Would that give us a clean and aggressive HF cut?

a quick 3d model to demonstrate our idea:



Has anyone tried this idea?
If yes please let me know the result, thanks a lot!

Wouldn't you get the same slope as the slope of the high-passed driver? You can try though.

 

[discus123]

My friend and I want to try something crazy and we came up with this idea:

What if we make 2 DD drivers face each other, reverse the polarity of one of the driver and high pass it. And maybe add a very small resistor to the other one to solve the phase issue or something idk. Would that give us a clean and aggressive HF cut?

a quick 3d model to demonstrate our idea:



Has anyone tried this idea?
If yes please let me know the result, thanks a lot!

Couple of years ago there's already have DIYer's doing it.

 

[mattmatt]

My friend and I want to try something crazy and we came up with this idea:

What if we make 2 DD drivers face each other, reverse the polarity of one of the driver and high pass it. And maybe add a very small resistor to the other one to solve the phase issue or something idk. Would that give us a clean and aggressive HF cut?

a quick 3d model to demonstrate our idea:



Has anyone tried this idea?
If yes please let me know the result, thanks a lot!

I think this is the same as AAWxCustom Art Isobaric layout and JH Audio's Jolene Dual driver.

 

[tomekk]

Silicone ciems. Clear canals, colored shells.