Home-Made IEMs
Apr 17, 2021 at 10:46 AM Post #12,649 of 15,989
Hey man, I'm also creating a shell right now. Would you mind if the one I'm making has a a similar shape? Creating one from scratch for Max right now.

What do you mean by creating a 3D case? You mean shell? :D
Go ahead. I'll be happy if my enclosure inspires your project. If I can find impression forms before I move to a new apartment I'll post a pics about prototyping the creation of a universal shell.

My workshop and projects are based on manual work because that is my favorite way to spend my time. Working with a computer limits time and allows for a lot of imagination, but in my case manual work is the whole idea.
 
Apr 17, 2021 at 11:47 AM Post #12,650 of 15,989
I left you a measure of the 38DX1 at the top of the page, made with a 711
Thank you! I asked him for a measurement because I know he has a Dayton IMM-6 too
 
Apr 17, 2021 at 11:48 AM Post #12,651 of 15,989
Looking at his measurements, i actually believe that there's a problem with his jig. Even with the 2389D, the cut off of the lows is somehow the same.
Lol never though to measure the 2389D bass to check...you're right! Gonna measure with a 711 next week
 
Apr 18, 2021 at 2:28 AM Post #12,652 of 15,989
So I just finished my latest build which is basically the MASM3 pro. Buffing it to get it shiny was a long and painful process.
So I thought I would compare my latest build (MASM3pro) to my old (very first) one.

The original was basically Furco build (Wood faceplate). And it was a bit tight after wearing for a few hours so I sanded it down and now its not so tight but also doesn't fit quite as good. Dont really care how it looks (its all about the sound,right!)

Sound wise the MASM3pro is better in most ways to the original(Furco). Better imaging, better instrument separation. Tighter, more well defined bass, if a little bit less in quantity. But this could just be that the originals bass is a bit looser and has longer decay time so gives the overall impression of more.
I really enjoy how the mids are done and would like to know how it graphs. Particularly I want to know where and how much pinna gain there is as the amount seems very good for my tastes. If anyone could lead me to a graph of it I would very much appreciate it.

Very happy with the sound,
Thanks to the community.
 

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Apr 18, 2021 at 3:31 AM Post #12,653 of 15,989
Talking to Kkugel, he asked me a really good question and let's see how you guys approach this.

How do you make sure that the IEMs you make has a great microdetail retrieval?

Let's one up the question.

How do you tune for these:
1. Microdetail retrieval
2. Soundstage
3. Instrument separation

What are the parameters you guys try to achieve to have these stuff checked? I think we came a long way through this thread but I think I haven't seen a discussion about this. Hope this come up with great ideas for everyone to share.
 
Apr 18, 2021 at 7:40 AM Post #12,654 of 15,989
Whether it’s question 1, 2 or 3, everything is related to a good phase-in, (I’m talking about optimal phase-in) and the choice of drivers.

For the recovery of micro details, we can add that it is necessary to have low THD rates to clean the signal.

Here too it is a story of driver choice and optimal setting, for which you can help yourself waterfall or impulsive measures.
 
Apr 18, 2021 at 8:47 AM Post #12,655 of 15,989
1) Microdetail = more extended high frequencies, more db on the high frequencies , Pick the right drivers, add more drivers .

2) Soundstage = metallic bores to the high frequencies , horn type metallic bores for the highs , Big ID tubes, more dbs over 10khz.
( the last method is not for est drivers ) find a way to make one micro hole to leak some sound out of the shell from the mid - high frequencies, you loose some DBs but this method make sound less harsh and makes it noticeable wider.

3) Separation = a very good crossover, good drivers, nozzle with 3 bores and up, bass shelf, V or W shaped sound.
 
Apr 18, 2021 at 9:22 AM Post #12,658 of 15,989
Apr 18, 2021 at 10:18 AM Post #12,659 of 15,989
So I just finished my latest build which is basically the MASM3 pro. Buffing it to get it shiny was a long and painful process.
So I thought I would compare my latest build (MASM3pro) to my old (very first) one.

The original was basically Furco build (Wood faceplate). And it was a bit tight after wearing for a few hours so I sanded it down and now its not so tight but also doesn't fit quite as good. Dont really care how it looks (its all about the sound,right!)

Sound wise the MASM3pro is better in most ways to the original(Furco). Better imaging, better instrument separation. Tighter, more well defined bass, if a little bit less in quantity. But this could just be that the originals bass is a bit looser and has longer decay time so gives the overall impression of more.
I really enjoy how the mids are done and would like to know how it graphs. Particularly I want to know where and how much pinna gain there is as the amount seems very good for my tastes. If anyone could lead me to a graph of it I would very much appreciate it.

Very happy with the sound,
Thanks to the community.

Oh that gradient is lovely! Nicely done
 

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