Home-Made IEMs
Jan 13, 2021 at 9:49 PM Post #12,152 of 12,426

Wgibson

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Re-did the CI-30120 brass tube measurements because they weren't sitting right in my head. Turns out I must have had a leak before on my driver inside zobel tests, with the big volume difference in the low end. Here is 0.6mm ID vs 0.2mm ID, both tubes about 25mm long and this time I made sure they were sealed well with tack.

Looks like a nice cheap and easy physical low pass solution for solid subbass with good rolloff to 1k and up. Not to get my hopes up too much, but that curve looks strikingly similar to a sonion 38d1xj007, for about 10% of the cost. Surely won't sound as good, but on paper...

Bonus, it will be extremely easy to package inside a nozzle, this 0.2mm ID 0.6mm OD tube is TINY. So as long as you have shell room to fit the driver itself, should be good to go.

Comparison curve, and 0.2mm ID tube pictured. You are looking at the thin side of the CI, other side is about 3x as wide.

CI-30120 brass tube.jpg

20210113_202528.jpg
 
Jan 14, 2021 at 7:54 AM Post #12,153 of 12,426

Luffytaro

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Can you currently get sonion E25 or E50 anywhere? Did they stop making them?

Edit: adding random thought: anyone used gutted TWS shells for wired projects? Lots of room in there for BA's...
I have 26-E25WT02/9, do you want to buy it?
Only one guy in the world:relaxed: sell E25. Check yoycart shop.
I have 26-E25WT02/9 and trying to build.
 
Jan 14, 2021 at 8:50 PM Post #12,160 of 12,426

Wgibson

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Yeah, thanks but looking for just the tweeter. And I live in the US so depending on price, it may not make sense to try to ship to me. Really they just look a little better than a 30095 so I was interested, but I have some 30095's ill try out first.

I looked up the datasheet and those seem like a good full range solution by themselves, maybe you just try to make a small earbud style, use foam or mesh filter on the nozzle if needed.
 
Jan 18, 2021 at 7:54 AM Post #12,164 of 12,426

BigBublik

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I want to make hybrid CIEM.
I like sound in my GK-31732 but i have more bass and more textured bass. I think use TWFK for tweeter and dynamic driver for woofer.
And i have some questions:
1. Crossover. Which i need to use?
2. Driver. I want to buy Sony MH755 or MH750 and extract dynamic driver. Or are there better options?
 
Jan 18, 2021 at 11:52 PM Post #12,165 of 12,426

Wgibson

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General question, which do you finalize first? Assuming you're happy with circuit design and preliminary frequency response measurements.

Do you finalize physical stuff like attaching and gluing tubing, dampers, verify fit in shell.

Or do you do all the wiring first? And risk having to rework or damaging something as you try to get it packed in a shell after it is wired?
 

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