Home-Made IEMs
Aug 11, 2022 at 1:55 PM Post #14,207 of 15,910
Does anyone have instructions on how to hook up an EST to make it sound right?
I want to remade a crossover in TRN BAX :)
 
Aug 15, 2022 at 10:49 AM Post #14,208 of 15,910
Hi Guys!
New member here, but have been watching this thread for a while - very impressed! I wanted to buy a measurement rig to measure my earphones - what do you recommend to be compliant with IEC711 standard? I saw you were ordering sth from AliExpress - can you recommend some sellers?
Cheers!
 
Aug 16, 2022 at 1:03 AM Post #14,209 of 15,910
I finally started to build my own iemsss..

1) RAB-32257
Surprisingly good sounding driver. I soldered it without any resistors. Sound so good without dampers, will try to wire up with 1-5R resistors to see if there are any sound different. I found it works good with white and brown dampers, when I installed Green dampers, it sounds like westone🤣

2) Rab-32257 as full range, 29689 with only 1.5-3.3 cap (proposed)
Have read ppl suggested 32257 + 30095. I still want to try the combination with 29689. Maybe need to add a resistor on 29689.

3) Dual Ci-22955 + 30017
22955 in parallel with 5.1R should be good. I am also thinking of wire up the CI with 5.1R and the second ci with 10R. But I am quite confused with 30017 maybe connect a 0.47-1.5uf cap according to suggestions from previous post.

Soldering is so difficult 🥹

Should I just buy myself a artificial ear?🤣
 
Aug 18, 2022 at 2:34 PM Post #14,210 of 15,910
I finally started to build my own iemsss..

1) RAB-32257
Surprisingly good sounding driver. I soldered it without any resistors. Sound so good without dampers, will try to wire up with 1-5R resistors to see if there are any sound different. I found it works good with white and brown dampers, when I installed Green dampers, it sounds like westone🤣

2) Rab-32257 as full range, 29689 with only 1.5-3.3 cap (proposed)
Have read ppl suggested 32257 + 30095. I still want to try the combination with 29689. Maybe need to add a resistor on 29689.

3) Dual Ci-22955 + 30017
22955 in parallel with 5.1R should be good. I am also thinking of wire up the CI with 5.1R and the second ci with 10R. But I am quite confused with 30017 maybe connect a 0.47-1.5uf cap according to suggestions from previous post.

Soldering is so difficult 🥹

Should I just buy myself a artificial ear?🤣
I have ruined few drivers due to poor soldering skills😮‍💨


And my rab+ed combination seemed not working too. When the drivers work tgt in parallel they sound ok. I have tried to wire only the ed + 3.3uf in series, the volume is low. Dont Know if it is correct....
 
Aug 20, 2022 at 9:12 PM Post #14,211 of 15,910
I have ruined few drivers due to poor soldering skills😮‍💨


And my rab+ed combination seemed not working too. When the drivers work tgt in parallel they sound ok. I have tried to wire only the ed + 3.3uf in series, the volume is low. Dont Know if it is correct....
Time to practice again bruv
Also never solder components directly on driver but on wire so you can fix it later
 
Aug 21, 2022 at 7:33 AM Post #14,213 of 15,910
Thanks for the support!

I use rab as full range. ED tab center + cab. Does +/- on rab need to be reversed?
Updates.


I spend few hours to make one side of my rab + 29689 combination.

Rab+/-reverse + red damper
29689 + 3.3uf cap + green damper.

it works finally. Last time i wire them with normal polarities rab got no sound.

i think rab with green damper + 29689 with withe might be also good as well but i could have ruined the wiring when changing dampera haha.


Photos will be posted after finishing a pair of it.


Cheers!
 
Aug 23, 2022 at 1:02 PM Post #14,214 of 15,910
Updates.


I spend few hours to make one side of my rab + 29689 combination.

Rab+/-reverse + red damper
29689 + 3.3uf cap + green damper.

it works finally. Last time i wire them with normal polarities rab got no sound.

i think rab with green damper + 29689 with withe might be also good as well but i could have ruined the wiring when changing dampera haha.


Photos will be posted after finishing a pair of it.


Cheers!
Good Night

I just finished building my first pair with my ears.


RAB 32257 Red Damper + ED 29689 Green Damper.

Sound is not bad with sufficient bass and mids and easy highs! Warm and not too sharp as well.

I feel so tired on wiring things up😵‍💫
 

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Aug 23, 2022 at 1:08 PM Post #14,215 of 15,910
Has anyone made something like this list but for IEM drivers?
 
Aug 28, 2022 at 5:36 AM Post #14,216 of 15,910
Hi there hello,

I am new here, been for a while as a reader and student, going through all the posts here. I wanted to start my personal iem for concerts. Anyways, I did my molds and 3d prints for shells and there is everything working fine. The problem I’ve got is to combine BA’s.

I’ve got setup with the Sonion 38AJ007 for bass with Yellow damper, mid and high is Knowles Gu32829 with white damper and tubing is 2x1,5 (inner)

The problem I’ve got is that I couldn’t make a proper Lo-Pass cause adding a cap in parallel on 38AJ007 affected also high end on Knowles. I’ve decided to kill the high end with the dumper on Sonion instead putting a cap. After all sound of this setup is missing high end, rolloff on 10Khz. Do you have any idea to tune this setup? Or does anyone have a good setup for BA’s like

Sonion 38Aj007; 2389D; e50dt; 37AJ007; 37Ap007.

I am slowly losing the faith for building something working and sounding at least good. The setup I described Sonion+Knowles is midrangy as heck. Snare is beating my brain :D if you could show me the direction I’d be grateful.
 
Aug 28, 2022 at 6:27 AM Post #14,217 of 15,910
Hi Arski,
You didn’t put serial resistance on the 33AJ? And what capacitor value did you put on the 33Aj?
I don’t want to discourage you but without measure it will be difficult to settle the IEM
:frowning2:
And in case you measure, let us your graph
 
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Aug 28, 2022 at 7:57 AM Post #14,218 of 15,910
My setup was with the 38aj007 on a bass Driver and there was no resistant at all, only 47uF on parallel but the high cut was on my 38aj and also on that Knowles gu32829, idk why it affected also the other mid/high driver. I’ll send the measure tommorow, the graph was pretty flat with the 10k rolloff
 
Aug 29, 2022 at 12:21 AM Post #14,219 of 15,910
Hi!

Does anyone know what are the damper colors of MH334 MH335DW?
I got 2 pairs of copies but the dampers inside seem not right.
My MH334 got 3 white dampers and MH335DW got only one white damper on CI

Besides, I want to build a new iem using Private 223 as reference. AFAIK, It is a MH334 Without CI.
Low/Mid: 33AP007 + ?ohm + White Dampers (Should have a resistor to reduce bass?)
Hi: 2389 + 0.68uf + White Dampers (Like MH334?)
 
Aug 29, 2022 at 9:31 AM Post #14,220 of 15,910
Hi there hello,

I am new here, been for a while as a reader and student, going through all the posts here. I wanted to start my personal iem for concerts. Anyways, I did my molds and 3d prints for shells and there is everything working fine. The problem I’ve got is to combine BA’s.

I’ve got setup with the Sonion 38AJ007 for bass with Yellow damper, mid and high is Knowles Gu32829 with white damper and tubing is 2x1,5 (inner)

The problem I’ve got is that I couldn’t make a proper Lo-Pass cause adding a cap in parallel on 38AJ007 affected also high end on Knowles. I’ve decided to kill the high end with the dumper on Sonion instead putting a cap. After all sound of this setup is missing high end, rolloff on 10Khz. Do you have any idea to tune this setup? Or does anyone have a good setup for BA’s like

Sonion 38Aj007; 2389D; e50dt; 37AJ007; 37Ap007.

I am slowly losing the faith for building something working and sounding at least good. The setup I described Sonion+Knowles is midrangy as heck. Snare is beating my brain :D if you could show me the direction I’d be grateful.
The issue you are describing is not a problem cause by the 38. Its inherent to the GU / GV. If you want that extended high end shelf, you will also beed to add a single driver super tweeter or an swfk. Also, the GU / GV series intention of design was to be plug and play. So, in the future, imo, youd be better served ordering those drivers independently.
 

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