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Posts by briskly

Beating out dynamic IEMs? How so? Some of multi-BA in-ears have good amounts of high treble, but in distortion performance, they are significantly worse than other dynamic in-ears (e.g. the RE400 and MDR-EX1000). The advantages of the balanced armature are in efficient sound output and size. I guess we can also count not needing a depressurization hole as a plus as well.   Balanced armatures are old technology; they've been around since before the 1940s.
Here's a measurement of the LCD-XC isolation. XC is green, LCD-X is purple, tested at 75db.   Isolation is good, not at the top of closed cans, and certainly nowhere near an IEM. Edit: The TH900 for comparison
If the k1k design is retained in a newer headphone, it would still be painfully inefficient. The appeal of a largely free air design would be limited to only die-hard audiophiles, aesthetic issues would be a major turn off for a large chunk of the market.The k1k wasn't that popular back then either.
The first looks like a certain inexpensive closed headphone, an on ear. Peaking at around 9khz or so, and lacking in the upper-mid to low-treble, pretty common as measured. Surprisingly smooth in the bass and mids. As a disclaimer, Tyll's head should be taken with a few grains of margin past 8khz. Looks nice.   The second looks like a certain not-quite-sealed up headphone that happens to cost a pretty penny, closed over-ear. Bassy as all hell, much smoother in the mid to...
Nope, still don't get you. The diaphragm moves just like in most conventional designs. These drivers don't produce electrical plasma to any significant degree, the main difference is how the force is being applied to the membrane. The membrane is very strong and stretched airtight, and is itself charged so that it can move in response to the electrified stators. See below image.  The limited excursion is because the electrostatic force is weak, and increases exponentially...
One is light and cheap, but is weak and breaks down in hot water. At least the ones I've used. Another disinfects itself, but is more expensive and tarnishes over time. The last is tougher and will stay sparkling bright for years on end.   It's all about needs.
The Westone 4 is very frustrating phone in that it has the drivers to extend right to 20khz (though it's still shelved), but it is painfully tip dependent. Failing that, since it does have the treble extension, you can always use that taboo tool for audiophilia: equalization. And when using foam tips, roll the foam past the center stalk.   Some measurements to give you an idea of what a different tip does to...
I don't quite understand this. You mean that early versions of the X Pro (and srm-xh) have a circuit similar to the SRD-X?
Different FR, different distortion characteristics, different driver types even. A 2-way balanced armatures in-ear will be very different from an open circumaural in presentation as well. In headphones, full sized ones anyway, you can build a driver to cover the full spectrum of sound, while this is totally impossible for any single driver in a speaker.
The decrease in harmonic distortion with increasing SPL seemed odd; the distortion comparison between the Headroom measurements and Innerfidelity isn't quite consistent.  For certain headphones (e.g. the LCD-3) the decrease in THD+N with increasing SPL corresponds almost exactly to the increase in volume. We might conclude Tyll's system has a fairly high noise floor from that, but his measurements for Headroom show much lower harmonic products for each headphone and a much...
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