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- Users: wolkegeist
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Fostex T50RP Incremental Mods and Measurements
guys, I disassembled the driver and the magnet fell out of place due to poor glue. how to I install them back in the right order?- wolkegeist
- Post #2,819
- Forum: Headphones (full-size)
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Obscure Chinese DAPs
I modded HD-X10, replace every big capacitor, swap SMD chip to OPA1612, swap big opamp to OPA1622 (best combo opamp from TI), but dropped it and one of the capacitor comes out due to my sloppy soldering. Now it's like a decoration that I hang on the wall to remind myself of the first time I try...- wolkegeist
- Post #7,008
- Forum: Portable Source Gear
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Home-Made IEMs
I don’t think the nozzle should be long, like maximum 3-4mm or something. If it’s too long you could accidentally jam it to your ears to hard that may leads to injury.- wolkegeist
- Post #10,494
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
Which drivers are you going to use, because to my eye the shell cavity is quite small for multi drivers uses. Maybe make the body thicker and the tube shorter somehow.- wolkegeist
- Post #10,492
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
Ahh it doesn’t matter how many pages it’ll take, I’m good at math lol. I’ll read both papers as soon as you post them. Gimme them knowledge!- wolkegeist
- Post #10,355
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
Nice @dhruvmeena96 , but how do you measure/know inductance of drivers? I can’t find any paper about inductance of balanced armatures. This would really help me making zobel circuit.- wolkegeist
- Post #10,353
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
Hey @dhruvmeena96, can you explain what is half tap and center tap is and what it does to drivers.- wolkegeist
- Post #10,351
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
It’s the FED-30048. EST should be crossed at 13kHz up to 14kHz, it’s better to be a super tweeter, it still need a tweeter.- wolkegeist
- Post #10,349
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
I tried many different type of caps man, idk about knowles caps but they’re probably X5R caps. For audio I think film caps and NP0 caps are the kings because of their low drift rate. But film caps are huge so they probably not gonna fit in a shell tho lol- wolkegeist
- Post #10,343
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
The ED-30761 is a surprisingly good woofer, check it’s frequency response chart man. 1700 is mid, 2389 is upper mid/tweeter. The ED one is very tricky because it has no nozzle, I have to use tube shrink to connect it to the tube. I used Craft Arrange UV resin for the shell, and A-B resin for...- wolkegeist
- Post #10,338
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
I used LS400 driver, which is a combination of Sonion 1700(??) and Sonion 2389, which is kinda similar to 1723 but without acupass. Formula as below: 2389 +2.2uF 1700 parallel 20ohm series Then a Cpad of 50ohm parallel and 3.3 ohm series. This is for a little bit of attenuation. Tube is 14mm 2ID...- wolkegeist
- Post #10,336
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
Oh I read some paper about impedance equalization circuit of speakers, the parallel RC zobel is to flat out the impedance of high frequencies, and then another parallel LRC circuit is to flatten the impedance peak due to Eddy’s current. But it has the very confusing value of Qes and Qms, which I...- wolkegeist
- Post #10,329
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
Anyone tried dual RAF + RAB 32257 + a dual tweeter? I'm thinking RAF series, 20ohm series RAB 32063 all in zobel 41ohm 4.6uF then SWFK crossed in 940nF- wolkegeist
- Post #10,325
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
There’s a common formular: R=1.25*Z C=L/R^2 Z is the impedance of the driver L is the inductance of the driver The problem is to find the inductance of said driver tho.- wolkegeist
- Post #10,323
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
I asked him but he said he won't order them anymore, he thinks E25ST0001/D is better than E25ST0002/D. he said alot of sonion's driver from China are made in Vietnam, which is where i live ha ha. I'll contact the local branch and see what happen. I'll update later- wolkegeist
- Post #10,317
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
Oh the Tommy store, I tried to get the drivers once but it’s always 1 in stock lol. I’ll try to contact him.- wolkegeist
- Post #10,316
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
Anyone knows where to buy Sonion E25ST001 driver? I’m searching taobao now but no result yet.- wolkegeist
- Post #10,310
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
You can try JVC wood driver or diamond driver. I found the link on taobao, but the diamond ones are quite expensive tho. https://m.intl.taobao.com/detail/detail.html?spm=a230r.1.14.177.380051eadAQ41w&id=592725759114&ns=1&abbucket=9#detail- wolkegeist
- Post #10,274
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
Guys is Alibaba the only place to get the 10 & 14mm Planar drivers ? do they sell in small quantity like 1-2 pairs?- wolkegeist
- Post #10,246
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
Just finished printing those shells. Can’t wait to put some juice in ‘em boiz.- wolkegeist
- Post #10,229
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
I saw a video on youtube of a guy making shell with A-B resin, but it’s in German and auto translate doesn’t really help tho. I used craft-grade resin so it’s pretty skin safe. I have plan on making a negative mold to put inside when curing, so it’s just the wall having resin and the center...- wolkegeist
- Post #10,086
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
Anyone has experience building shell with A-B resin? I already has the impression, but idk how to use the AB resin tho. Do they need special curing time? Please I need help- wolkegeist
- Post #10,081
- Forum: DIY (Do-It-Yourself) Discussions
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Fiio x1 won't turn on
I have the same problem. Tried sticking in the tiny hole, nothing happened. IDK somehow when I remove the TF card, everything went back to normal- wolkegeist
- Post #38
- Forum: Introductions, Help and Recommendations
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Home-Made IEMs
IDK the name, but here’s the picture- wolkegeist
- Post #10,032
- Forum: DIY (Do-It-Yourself) Discussions
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Home-Made IEMs
I have the white one, tbh I don’t like it at all. I have to cut the nozzle and cure my own nozzle from uv resin. I have plan of making mold from clay and then cast to silicon negative mold, for later use. Btw you guys should try Craft Arrange A-B resin, it’s for crafting so no toxic and no funky...- wolkegeist
- Post #10,029
- Forum: DIY (Do-It-Yourself) Discussions