Home-Made IEMs
Jan 12, 2021 at 4:57 AM Post #12,138 of 12,426

dhruvmeena96

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One cap is enough I believe. One cap 2.2 uf is the lowest you can go and is the standard for the most tweeters .



10mm length i mean ,

Best is , the length of the tube to be as short as possible , depends of course the length of the nozzle .
i even use 470nF on some iem
and even 0.1uF

ir depends on the application
for me 2.2uF is very high and i use 1uF and bellow that
 
Jan 12, 2021 at 5:19 AM Post #12,140 of 12,426

dhruvmeena96

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I have never tried it.
I don't know. For me 2.2 is the lowest .
I will try 1uf and below to a 2354. I will test it later with my ears . 🙂
2354 and 2389 are not tweeter. they are fullrange driver with emphasis on uppermid
for tweeter, you have wbfk and swfk

for 2389, i do 2.2uF Center tap to get my pinnae region correct, the fundamental first peak at 3kHz)
but i do this when i have seperate mid region(100Hz to 1kHz) and proper subwoofer/woofer driver)
 
Jan 12, 2021 at 9:54 AM Post #12,143 of 12,426

dhruvmeena96

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The 2389 is also a tweeter and that's for sure .
The 2389 is made as a tweeter.

The 2354 has also very good treble . See datasheet.

I never had and I don't have Wbfk or swfk.
man, ok
in iem

below 200Hz - its a woofer/subwoofer
from 100Hz to 1kHz- its midrange
from 1kHz to 5/6kHz - its uppermid(sonion 2389)
from 6kHz and above - its tweeter
from 10kHz and above - its supertweeter

this is not speaker, because in iem you have to compensate the pinna loss(the sound dont interact with our outer ear which boost the region of ~3kHz in iem). Thats why its classified as uppermid(you can classify it as tweeter for your own preference but this tweet thing might confuse other as it confused me)

technically when you see harman curve or any other curve(you see 3kHz boosted) uppermid, most of people here classify it as Uppermid or pinnae region
 
Jan 12, 2021 at 9:56 AM Post #12,144 of 12,426

dhruvmeena96

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What does series inductor does? Never used inductor but it seems that quite some big companies use them. And with inductor as rc low pass it does not add resistance.
low pass
but the Henry value is so low, i think its only for very minor fine-tuning and nothing else
i cannot consider it as a definite part of the crossover
 
Jan 12, 2021 at 7:08 PM Post #12,148 of 12,426

Wgibson

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Can you currently get sonion E25 or E50 anywhere? Did they stop making them?

Edit: adding random thought: anyone used gutted TWS shells for wired projects? Lots of room in there for BA's...
 
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Jan 12, 2021 at 9:36 PM Post #12,149 of 12,426

dhruvmeena96

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Can you currently get sonion E25 or E50 anywhere? Did they stop making them?

Edit: adding random thought: anyone used gutted TWS shells for wired projects? Lots of room in there for BA's...
they are still making them and its hiding somewhere in the dark corner inside the basement of sonion warehouse
its hard to get sonion 4100 , 4400 and E series
 
Jan 12, 2021 at 10:35 PM Post #12,150 of 12,426

Wgibson

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they are still making them and its hiding somewhere in the dark corner inside the basement of sonion warehouse
its hard to get sonion 4100 , 4400 and E series

I guess we just wait and see if a reseller purchases some for low quantity sales.
 

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