Your questions are so advanced that they probably triggered the Echelon in all five countries — hence no replies. Presuming others are dead and they already are tracing me: $5 that nobody here tried GP yet. I haven't had a chance to gut the Sony XBA series, but according to the people they...

Sorry for being unclear. I was talking about ordering drivers, not phones.   I am the author of probably the worst sounding IEMs in the world. Drivers were from a small shop wannabies. They lied about 1) the chamber cm³ 2) tubes length 3) tubes diameter.   I distrust graphs probably more...

Quote:   In terms of sound purity a single driver setup is at the top. The next is a mechanical crossover, but the complexity of high-pass and band-stop filters renders them hardly usable for IEMs. Then electric crossovers start. And badly designed high order ones could be more evil...

Also, the 711 is what is used for all those Golden Ears graphs:     But generally 3rd party graphs are full of gotchas. It's a bit like mail order brides.  

Well — if you want to learn about how the circuitry (and the world in whole)  works — the best source for your age is Khan Academy. I know a lot of adult people who can't stop watching the guy. Circuits (part 1) • Circuits (part 2) • Circuits (part 3) • Circuits (part 4)   There are some...

We'll see. Once we finally turn you, there's no way out. You'll slowly start avoiding sun. And the end is terrible — acoustic-only high-pass and band-stop filters.  

Quote:   If you change «sound» with «food»¹ in your question, you'll see how hard it'd be to answer. So. You can start with nothing, just the driver (I know at least 3 people how like it that way). Then try white and gray dampers. Then 1-3 caps. Try changing the length of the tube (to...

Well, good luck. Here is some info if you want to tweak it:   «TWFK drivers have extended HF response and may benefit from smoothing of high frequency peaks. With no damper, there's a spike between 600 and 800 Hz, from 112 to 121 dB. A 330 ohm damper reduces this spike to 115 dB and sets its...

Tools are cheap: Soldering station or any other you like. The bigger problem is to buy the drivers, tubes and dampers without paying for shipping. I don't know about the USA/Canada, but for the most parts of the world the free shipping is only on orders over $200, otherwise it's $60.   Maybe...

Guys, there is one thing about IEMs that I do not understand much: Why there are no commercial TWFK + ED-23147 combos? The reasons why it is a good triple are: 1) very nice sounding (nice TWFK mids & acceptable highs + ED extended and honest, but not overwhelming bass) 2) easy to X-Over...

Quote:   Would you do yourself a favor and check the driver model of Etymotic ER4. Then compare it to the model I said the UM2 uses. Then ask yourself what a «troll» means.

I beg you in the name of Zarquon to do take photos, and if you can, videos. High quality silicones of a proper hardness are so much more comfortable than the rocks... I wish you the best of luck in this project, bro!   «the smallest most hidden shell I can make» sounds like ACS T3 with a...

Quote: Last time I checked, the public Sonion graphs were not reliable due their priority & conditions = hearing aid tests. Selecting a driver just from these graphs alone might not be a safe idea.    

Quote: Welcome to the dark side...  

Here is an online Crossover calculator. The whole thing is dead easy in simple designs, starts with just 1 resistor an 1 capacitor.  

Quote:   This is a very friendly illustration. Edit: this one is friendlier.

THD is not an issue with uber components (another reason to diy). The point is THD is there — proportionally to the price. So that particular Bilavideos' argument of his rant is valid for the cases he was talking about.   If PFE is 23xx, a really anal spy could figure the xx by buying the...

Bilavideos was weird with HF there, I agree. He didn't even used any damper on the TWFK, not even the white one.   Please understand my position on the acoustic vs electric X-ing: 1) I prefer acoustic whenever possible. 2) I agree that electric is required for advanced tuning. 3) I...

To finalize the whole diy aspect of the topic:   Even if you are dead skeptical about acoustic crossovers, or you're not so good with electronics — there is at least one driver you still can try. It's a magic double-driver in a single casing made by Knowles.   If you like Fischer DBA-02...

Quote: There are UM3x sub-versions. Please check the DIY thread beginning. It started as an UM3x clone diy. As to the crossovers, please refer to this manifesto. I've just talked about it with a fellow member who works for a BA manufacturer (you know who he is). I hope it's ok to...

Quote: Yes, putting a tube into a 2mm hole + putting a cloth filter in it does. As does even a DIY sex session.  

Quote: (Mumbles) UM2 = ED-29689 + CI-22955.  

(Mumbles) My point is that cable is cheaper to diy. The wire is $10/feet. Not easy to come by, but not that hard. And it's not that great anyway.

What uF and mH would you use and with what dampers?

Quote:   I forgot to mention that this design was suggested by Bilavideo, not me. Also, it replicates the UM3X / W3 design — 100% same drivers. The original has a single resistor slapped on CI and the white damper on the combined tube. If you want, you can slap it too — this would...