[Im1fan2nv]

Hi there, I had to go at it for 4 tries before I got the sound right, my first try was
the tubes on the HOD and the CI to a 2mm tube while using a red filter on the TW to another 2mm tube, this sounded almost identical to just the GK alone. Second try was separating all drivers to individual tubes, one for HOD, one for CI and one for TW all 2 mm tubes, this sounded a bit different but the tubes got squashed and the sound on both CI and HOD got blocked. After this I got myself some 20G needles to use as tubes, this was better, the tubes no longer got squashed but the sound got totally destroyed, I no longer had any treble whatsoever... I was about to give up when I read here that tube diameter affects sound and it's recommended to use small diameters on lows and large diameters on highs.

So the last try was to keep the needle tubes for the HOD and CI and use the 2mm plastic tube on the TW, my god what a difference! Sparkling high's and warm punchy bass, I'm a fan of classic rock so I fired up TIDAL and played Jethro Tull's Hunting Girl (Steven Wilson Remix) [96/24 PCM Stereo], I haven't had earphones ever sound this good!

I'm in the process of putting together a measuring rig to get some curves, very interested to see how it compares to the good stuff everyone else has been making.

Wow, using hypodermic needles, now to me, that’s thinking outside the box. I will have to say that when I was trying this combination, like you, it was before I figured out how to use two size ports. Do you use 2mm until the exit them use the needle? (any pics?) Also I have since found copper tubes, but they are coated silver. However, I’m not sure what will happen long term if the silver has a scratch or a cut tube(exposing copper) will do? They als have stainless but not as small as 20G needles. This is where the needles will be a much better choice.
As far as putting together the rigs for measuring, the one for the impedance is pretty easy to do but since low pass xovers just don’t seem to work based on calculations, I don’t find it much useful. I don’t have very expensive equipment for my FR curve but with some luck, what I have works pretty well. I’ve used it to compare my Sure SE535s and SE846s and get curves very close to what I found online for those. I’ll try to post some pics when I get some together. Thanks for the input.

I hope this link works

Tubes:

https://www.aliexpress.com/item/Bra...lgo_pvid=8db16d61-d95f-43ee-a56a-9daaa7151e23

Hi, can you tell us, what you have changed on your Set Up, or what makes the Difference
I sometimes have the same Problem especially with the clear material.

Thanks and greetz Chris

It was with help from here but if I had to put my finger on 1 thing, it was getting light to the bottom. I have one of the small nail lights and what I do to accomplish this is turn the light upside down, put a piece of acrylic on top of the lights, set my mold on, place foil over entire bottom opening and cook. I used 40 seconds each way(right side up and upside down) pour out, repeat both for same times. Remove from mold, into glycerin and cook 4 min, move shell around and cook 4 more minutes all right side up, I have a small mirror under the rotating table(pics inserted later). Then place into isopropyl bath. Hope this helps.

 

[Im1fan2nv]

What are needle tubes and where do get them? I've got super small ear canals as well : (

Hypodermic needles come in different gages, 20G are the thickest ones I could get my hands on, gonna try with these once they arrive: https://es.aliexpress.com/item/12pc...108.1000016.1.129e8ca5IN4SvS&isOrigTitle=true

I saw a couple of guys here using metal tubes, and hypodermic needles was the closest I found to those metal tubes. Anyone care to share where you get your metal tubes?

I did some looking around and found that you can buy various diameters of bendable metal tubing that people use for crafts, etc.

Unfortunately it does not look like there are very many sources for small outer diameter tubing, but the following links should give you an idea of what is available:

https://www.hobbylinc.com/htm/k+s/k+s9870.htm

https://www.hobbylinc.com/htm/k+s/k+s9831.htm

https://www.hobbylinc.com/htm/k+s/k+s9830.htm

How about these and just cut off the plastic?

https://www.aliexpress.com/item/20G...lgo_pvid=3616226f-dcbf-45ab-8f9f-fc3c51a82d5d

 

[Spinnerauto]

Hello everyone could you tell me How to join the sound tube with BA driver?

 

[jbr1971]

I have had great success using Bondic (for many different types of applications). It is a liquid plastic that dries using uv light.

After drying it is extremely strong and durable, so make sure you have all of your measurements/parts correct or else it will be a huge pain to take apart.

https://notaglue.com/

 

[Shilohsjustice]

Hello everyone could you tell me How to join the sound tube with BA driver?

Loctite 495 works extremely well, I will put a couple drops on wax paper and use a toothpick pick to apply around the BA nozle. It drys quick and I haven’t had any builds come apart since switching over to it.

 

[Im1fan2nv]

Loctite 495 works extremely well, I will put a couple drops on wax paper and use a toothpick pick to apply around the BA nozle. It drys quick and I haven’t had any builds come apart since switching over to it.

That's the same thing I use. You practically have to rip the tube off if you want it removed. Much better than any UV cure material I've tried. They just don't hold. I bought the accelerator as well to speed up cure time.

 

[tomekk]

Small leaks from my obsession:

 

[Bassiklee]

Are those soft tips on the white ones?

 

[tomekk]

Are those soft tips on the white ones?

Clear canals. At this point they already have hollow channels such as VE or RCM.

 

[BigBublik]

Who use this UV Resin?

https://images-na.ssl-images-amazon.com/images/I/61tuKEoXd+L._SL1016_.jpg

 

[Furco]

Who use this UV Resin?

https://images-na.ssl-images-amazon.com/images/I/61tuKEoXd+L._SL1016_.jpg

Do you want to know if it will work for creating shells? I’d say it would be ok but you’d have to figure out the process given your mold materials and curing light setup.

 

[BigBublik]

Do you want to know if it will work for creating shells? I’d say it would be ok but you’d have to figure out the process given your mold materials and curing light setup.

Yes, i wanna creating shells.
I'm confused about the price. It is several times cheaper than fotoplast.

 

[Einencool]

Is it also Skin Save?
That’s why the fotoplast or the other materials for otoplastics are so expensive.
You should protect it with a layer of lack3 from dreve or something like that

 

[BigBublik]

Built their first IEM on the ED-29689. Used a resistor on the 20Ohm and did not use dampers in the tube. BUT! Is not enough low frequencies.

Which driver in a couple of ED-29689 you recommend? And what a crossover is needed for this pair?

 

[Spinnerauto]

Clear canals. At this point they already have hollow channels such as VE or RCM.

How to do the hole like your pics and how to create solid white shell like that.Thank you