Home-Made IEMs
Jan 23, 2021 at 5:27 PM Post #12,211 of 12,426

MISHKA2020

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Oh thank you all guys. I know I can always count on you! I may not have sharpened well, and I also touched with my bare fingers. I'll fix it. Cheers 😁

Edit:

It's much beter when i use 320 sand. Till now i was using 800 and more. And i also using isopropanol in spray bottle. Now i spray on faceplate and first thing you can se are there bubbles or not. Even if it's not lack. If they come, i'm sanding again. Faceplate is the hardest to do like @mattmatt said.
Especially if it's flat. That’s why I always put resin at the end to make a small dome. So the lack follows and becomes flatter.

Once again, tnx guys. I will definitely try to spray lack in the future. It seems simpler and of better quality.



This is one of the reason why I switched to airbrushing hahahah!

Anyway, like what Aldo40 said, always sand before lacquering. I use 240 for this then I also pass it with a dremel abrasive wheel. I also clean it really well with IPA to a squeaky clean finish then blow it with compressed air too to ensure that I have no dust before applying the lacquer.


Thank you
 
Jan 23, 2021 at 5:46 PM Post #12,212 of 12,426

Aldo40

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What is important in the varnish is the preparation of the face. These are not techniques specific to the IEM, it is the basis of the varnishing.

I make surfboards and it is similar to the level of preparation, a gloss will be very beautiful if a topcoat is well sanded and clean.

I varnish with the brush and lake3 only and I do not need to touch up, it is a perfect mirror:

Watch this video of unique Melody, the method is the same:
 
Jan 23, 2021 at 7:13 PM Post #12,213 of 12,426

piotrus-g

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Also guys

I have given up on making notes on resonator
It has lots of variability
I mean, the point where Helmholtz resonator opening meets at tube, also effects the damping schema

Only one guy can teach you
@piotrus-g sensei

Because it's not just resonator by calculation, but the shape and size effect the dampening power
And also the specific distance(perpendicular to tube) on tube
Also effect the coverage pattern

Da boi doesn't want to do it

Second

Inductor has a very big problem
It restricts the last octave region on treble
And doesn't do much
And I don't like restricting my air or you can say last octave

I want the driver to let loose
Hahaha, lol. Definitely lots of variables and there are some tricks to it and unfortunately I cannot say more
 
Jan 23, 2021 at 8:28 PM Post #12,214 of 12,426

mattmatt

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What is important in the varnish is the preparation of the face. These are not techniques specific to the IEM, it is the basis of the varnishing.

I make surfboards and it is similar to the level of preparation, a gloss will be very beautiful if a topcoat is well sanded and clean.

I varnish with the brush and lake3 only and I do not need to touch up, it is a perfect mirror:

Watch this video of unique Melody, the method is the same:
Hi, i quite don't understand. What do you mean by surfboard? :)
 
Jan 24, 2021 at 4:43 AM Post #12,215 of 12,426

Aldo40

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Hi, i quite don't understand. What do you mean by surfboard? :)

I was talking about the steps of sanding and varnish on resin whether acrylic, polyester or epoxi, it is the same process on surfboards, lutherie, automobiles etc.. IEM simply replicates known finishing techniques in other areas.
 
Last edited:
Jan 25, 2021 at 5:42 AM Post #12,216 of 12,426

Aldo40

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There is also the solution of soaked entirely the intra in the varnish as do earsonics but I do not recommend it for those who do not often because you have to be sure to have the bores and the connector well waterproof and of course have a closed shell and not ventilated. We can see the manipulation at the end of this video

 
Jan 25, 2021 at 7:51 AM Post #12,218 of 12,426

duo8

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So I messed up and ended up wasting half of the mold silicone. The syringe I used also had too short of a nozzle.
I used 7g (each) here but next time I'll probably use 5g. I wanted to make a full ear impression (like what 64 audio would require) but it seems too difficult to do by myself.
The place I bought this from said the silicone hardens after 5 mins, but I noticed it only fully hardens after 12 mins or so.
I attached a few pics of the impression. Does it look usable?

DSC06030.JPG
 

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Jan 25, 2021 at 4:07 PM Post #12,219 of 12,426

ForceMajeure

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So I messed up and ended up wasting half of the mold silicone. The syringe I used also had too short of a nozzle.
I used 7g (each) here but next time I'll probably use 5g. I wanted to make a full ear impression (like what 64 audio would require) but it seems too difficult to do by myself.
The place I bought this from said the silicone hardens after 5 mins, but I noticed it only fully hardens after 12 mins or so.
I attached a few pics of the impression. Does it look usable?

DSC06030.JPG

These aren't good enough for deep fit. Your canal lacks material. the cymba also look like it's lacking a bit, although you could get away with that. When you take impressions you should make sure that you don't take out the syringe out of your ear canal before the material starts to come out from there. You should insert as much material as you can and then slowly move out.
 
Jan 26, 2021 at 2:54 AM Post #12,220 of 12,426

duo8

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These aren't good enough for deep fit. Your canal lacks material. the cymba also look like it's lacking a bit, although you could get away with that. When you take impressions you should make sure that you don't take out the syringe out of your ear canal before the material starts to come out from there. You should insert as much material as you can and then slowly move out.
Does the syringe have to reach deep into the canal for the material to go in far enough?
The one I'm using has a short (1cm) tip/nozzle.
 
Jan 26, 2021 at 2:31 PM Post #12,221 of 12,426

MISHKA2020

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So I messed up and ended up wasting half of the mold silicone. The syringe I used also had too short of a nozzle.
I used 7g (each) here but next time I'll probably use 5g. I wanted to make a full ear impression (like what 64 audio would require) but it seems too difficult to do by myself.
The place I bought this from said the silicone hardens after 5 mins, but I noticed it only fully hardens after 12 mins or so.
I attached a few pics of the impression. Does it look usable?

DSC06030.JPG

Sorry but i don't recomand you to use that. Top of earcanal on impression is not useful. I guess you saw on the you tube a guy who using syringe. Buy from AliExpress original for 11$. Use this impresions only for practice to make final shape and dipping into wax. And that part requires a certain skill trust me! About impression material, you got two components. A and B (activator and base) if you want faster hardnes, use more of A (activator). Maybe I didn't understand you ... If you just need molds to send to Audio 64, go to a hearing aid store and ask them nicely to take your earmolds. At least that's what I did the first time. Good luck 😊
 
Jan 26, 2021 at 4:42 PM Post #12,223 of 12,426

ForceMajeure

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Does the syringe have to reach deep into the canal for the material to go in far enough?
The one I'm using has a short (1cm) tip/nozzle.

Take notes from that vid
Regarding the material hardening time. it also depends on the ambient temperature and how old or new the material is as well as the ratio of mixture.
 
Jan 26, 2021 at 11:06 PM Post #12,224 of 12,426

duo8

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Sorry but i don't recomand you to use that. Top of earcanal on impression is not useful. I guess you saw on the you tube a guy who using syringe. Buy from AliExpress original for 11$. Use this impresions only for practice to make final shape and dipping into wax. And that part requires a certain skill trust me! About impression material, you got two components. A and B (activator and base) if you want faster hardnes, use more of A (activator). Maybe I didn't understand you ... If you just need molds to send to Audio 64, go to a hearing aid store and ask them nicely to take your earmolds. At least that's what I did the first time. Good luck 😊
Too late to buy anything now...
I modified the syringe to have a 12.8mm nozzle (was 8mm before). Hope it goes better this time.
 
Jan 26, 2021 at 11:13 PM Post #12,225 of 12,426

Luffytaro

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What is important in the varnish is the preparation of the face. These are not techniques specific to the IEM, it is the basis of the varnishing.

I make surfboards and it is similar to the level of preparation, a gloss will be very beautiful if a topcoat is well sanded and clean.

I varnish with the brush and lake3 only and I do not need to touch up, it is a perfect mirror:

Watch this video of unique Melody, the method is the same:
I see this video every day :)
 

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