Home-Made IEMs

  1. aussietanker
    Can i ask why you are using Egger in preference to Dreve. Is it simply a supply issue, price & cost, easier material to work with, thickness of the shell or you feel it gives you a clearer shell finish? Would appreciate your opinions (before i place my order :) )

    Thanks
     
    Last edited: Oct 12, 2017
  2. MuZo2

    Where are you located? have you checked on taobao? they sell from complete ciem to shells , drivers, kits.
     
  3. alanwcruz
    I mostly used tutorials by Shilohsjustice, the only thing I haven't seen mentioned is the method I use to take ear impressions. Where I live audiologist supplies are very expensive and no audiologist I could find would only take my ear impressions. So I got myself some dental alginate and used it to take my impressions myself, it also takes practice to get good results, it's not as easy as it seems.

    Here are my first tries:

    IMG_5851.JPG

    As can be seen, they where completely unusable. But practice makes perfect.
    IMG_7301.JPG IMG_7303.JPG

    After that, i just followed the gelatin mold tutorial:
    IMG_7306.JPG IMG_7307.JPG IMG_7309.JPG IMG_7310.JPG

    Then poured acrilic and cured under my DIY cure chamber
    IMG_7311.JPG

    As far as electronics, for my personal pair, i used a GK with red damper on the highs, also a HODVTEC in parallel for extra punch on bass:
    IMG_7332.JPG

    After wrestling with the small space inside my shells in order to fit the drivers in, i made a blue faceplate dying acrilic with food coloring powder, covered my shell with it, attached some old cables i had lying around and voila
    IMG_7320.JPG
     
    Last edited: Oct 13, 2017
    Firedrops likes this.
  4. Shilohsjustice
    Just curious if anyone has tried “alcohol ink” for coloring shells?

    I picked some up and plan on doing some experimenting with it. Could be promising, I’ll post my thoughts over the weekend.
     
    discus123 likes this.
  5. Im1fan2nv
    That's what I call getting it done..

    I'm curious if you have any FR curves with the extra HODVTEC. I tried combining one with a GV using various tuning circuits and as it turned out, the FR curve and sound was better with just the GV. So I figured it was just a waste of money to put the extra HODVTEC in it.
     
  6. ForceMajeure
    alcohol ink is good if you want to dye certain materials before adding a resin layer on top. f.e metal or wood or other types. the advantage is that it drys quickly and can penetrate less porous surfaces. the effect coloring is a bit different and you can use it to your advantage to make certain designs

    Btw alcohol inks are expensive. there are a few diy alcohol ink guides using sharpies and isoprpyl alcohol that work as good a s the real thing.
    Ranger has a ton of special colors http://rangerink.com/?product=tim-holtz®-adirondack®-alcohol-inks
     
    Last edited: Oct 14, 2017
  7. Shilohsjustice
    Thanks!!!! I colored some Fotoplast this morning before work and it mixed instantly. I’m going to see how it cure later today. There are some cool techniques I’m going to try for marbling that may workout cool. I’ll post later some pics.
     
  8. Shilohsjustice
    Ok, so I don’t have any pics right now as I am not home, but I’m hoping to have some later. I can confirm that the alcohol ink is AWESOME at coloring Fotoplast. It mixes well and it cures well, I actually like it better than the resin obsession at the moment. I have tested 3 colors and will post some pics later with some results.
     
  9. aussietanker
    @alanwcruz.444931

    It looks like your drivers are fully encased in the tubing or am I just seeing things? How did you do that?

    Have been spending a bit of time looking at YouTube videos on this very subject. I am keen to see how your's have turned out!
     
  10. Arturo Sallas
    Hey Guys here´s my first attempt. I followed the tutorials from Shilohsjustice about the gelatin molds, and the technique of pouring glycerine to finishe the curing and everything went fine. The color shell I made it with acrylic paint but it was supposed to be turquoise color but it turns darker when mixed with the resin, so now it´s an ugly greenish blue haha.

    The drivers I used are HE-3175, WBFK-30000 HF reinforcement and a CI-22955 as subwoofer reinforcement.

    The only problem i have found that the HE-31751 has lower output than the rest of the drives so the lows overpower a little bit the highs, I´ll try to level them with resitors.

    Thanks everyone for all the info you guys put on here.
    DSC_2083.JPG DSC_2086.JPG DSC_2092.JPG IMG_1796.JPG IMG_1797.JPG IMG_1800.JPG IMG_1801.JPG
     
    Firedrops likes this.
  11. alanwcruz
    Nope, no FR curves, I'm still not up to that step hahahaha. For now my ears are my measuring equipment. AFAIK GV already comes with a HODVTEC. The GK I use comes with a CI, I saw the curve for the HODVTEC in its datasheet and saw it has a higher db output on the bass frecuencies so I thought it would raise those frequencies if I paired them. It was quite the challenge fitting them all inside my extra small shells, and more of a challenge finding the correct tubes to get the sound I was looking for. As it has been said here, the tubing diameter plays a very big part in the sound, and with my horribly small ear canals, fitting individual tubes was all together imposible, so I used a small diameter tube on HODVTEC and a bigger diameter on the CI and put both of them together, so only a single tube would be used for bass and mid.

    I found that bass can be tuned playing around with the length of the tubbing.

    Once I build my measuring rig I'll post my FR curves.

    Anyone have any pointers on how to build some DIY measuring equipment?
     
  12. alanwcruz
    Nope, just the tips are in the tubing, here's another pic where it can be seen better:

    IMG_7333.JPG
     
    aussietanker likes this.
  13. aussietanker
    Got it! Thanks for the explanation. They look great. I also see how you have "fed" one tube into the other to save some space. How did you get a round hole in the other tube? Is there a special punch that is used for this purpose? And did you glue around the join?


    I am still waiting on my reasons and equipment to arrive so have to be content with lots of reading at the moment.
     
  14. Shilohsjustice
    41AD5D39-9DFB-4701-9B33-1905D0FAA64F.jpeg Here is a quick pic of the mixed Fotoplast, I haven’t made any shells but will be.
     
    Im1fan2nv, alanwcruz and Bassiklee like this.
  15. alanwcruz
    I use the tip of my hot soldering iron. As far as glue, I use acrylic as glue, I put a little around the tube and then cure it for some 20 seconds. Gives a perfect seal and can be handled right away.
     

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