The description says it can give 30mW at 32ohms.. if rest is costant it might give approx 60mW at 16ohms..
My doubt isnt about power required to get desired loudness. Its about 'scaling'. By scaling i meant iem performing better technically with more power.. i see it in planar iem reviewes.
I fully understand your point. When you say perform technically better, what does that mean. How do we quantify that?
Here is my interpretation. Planar Magnetics, have a higher dynamic range, in theory, compared to dynamics. This implies that dynamics are introducing some compression/limiting in the audio signal. And the various tests by reviewers demonstrate this in their measurements, that planars have less distortion, than dynamics. Distortion being the result of compression or limiting.
I.e to get the best result from a planar, the headphone amp has to have ample headroom, before its power runs out, and it becomes the limiting factor. This is where the "more power" you stated comes into play.
More power allows any transients to be fully transferred from the headphone amp, to the planar magnetic, without the headphone amp being the limiting factor, creating the compression/distortion/limiting, because it cannot properly deliver an uncompressed version of the transient, to the planar.
In my earlier comments where I was aiming for a 90dB SPL average listening level, I made an allowance for transients of up to 20 dB above this, so I used 110dB SPL, in the target calculation, to accomodate such transients. This should be more than enough for most commercially produced music.
So if you assume the JA11 can deliver 60 mW @ 16 ohms, that should be more than sufficient to deliver a 90dB average SPL, with headroom to take transients above this to 110dB SPL - momentarily, so you do not lose any of the detail in the music.
It then begs the question, is this an answer seeking a problem? Why the JA11? Would the better answer be to purchase a different device that clearly has no issues with power delivery? Is the reason for preferring the JA11 cost? At this time, the JA11 is less than $15 in most places sold. Which puts it at about $6 dollars more than the best bargain ever in dongles, the Apple dongle, which is OK, if not the best.
I own an Apple dongle, the US version, but only use it for phone calls and online chats/meetings, since I moved to a TempoTec Sonata BHD, for all my other listening.
I think the specs of the JA11 are pretty good and actually outstanding, for the price. If I was starting out today, knowing what I know now, I think the JA11 would be ok, to power most IEMs, including the ARTTI T10, albeit I have not listened to my ARTTI T10's via the Apple Dongle US version.
I mention the Apple Dongle US version cos it has very similar power spec to the JA11 - with a measured 31 mW @ 33 ohms see review below.
This is a review, detailed measurements and comparison of Apple's USB-C adapter to the current and last version of Google Pixel headphone adapters. The Apple adapter costs just $9 including one day shipping for free. The Google dongle costs $12. Not that any of these are large by any stretch...
www.audiosciencereview.com
The Apple dongle drove my other IEMs to far far more than enough level - in simple English, I would go completely deaf, within a few seconds, if I ever attempted to listen to the Apple dongle at max volume. I'm usually at well over 30dB attenuation digitally on my computer, when listening to my other IEMS via the Apple dongle.
As long as you are aware of the potential issues with JA11 firmware updates, which are either required or NOT required ( I cannot remember which it is), please for the current cost of typically less than $15, including delivery costs, please go ahead and buy the JA11, and it should do a good job with the ARTTI T10, or any other IEM, and have enough headroom to deliver excellent dynamics, i.e what you describe as technicality, to any typical IEM, dynamics or planar magnetics like the ARRTI T10.
I may also buy the JA11, whenever I find it on sale, cos it would have one advantage over the Apple dongle, which needs a headphone plugged in, for it to be recognised in Windows. I prefer to be able to swap headphones on a dongle, without the dongle "vanishing" in Windows, every time I do this, and me needing to reconfigure any apps attached to the dongle every single time this happens !!
A few years ago, the kind of quality I can expect sonically from the JA11, would have cost several hundred dollars, at the least. It's a bargain. Just buy it. It is the best budget alternative to the Apple dongle, that I am aware of. And it has the Android App to setup custom EQ's. As a bonus.
