I'm really really hoping they decided to avoid MMCX in the end - Vitaly didnt answer clearly but I think he did sort of look troubled when he said no commitments had been made to MMCX on the last Q and A. Even since I asked back then I've read a few negative reports about them on other iems...
Switching between the A12 and V6-Stage leaves me thinking the addition of ADEL is going to make those who backed the U6 & U8 really happy. At the KS pricing they could go down as one of the best iem deals ever.
I'm deliberating on whether I should make a sound science post instead, but basically, the idea I have is that the ADEL allows adjustment of the acoustic impedance difference to near zero. I'm not entirely sure if I'm using the terminology right, or if it's a valid hypothesis, but I think the difference will allow the diaphragm of the driver to move more equally in each direction, which means that the waveform will not be biased in either direction, leading to more accuracy. The speed could also be affected because the pressure from the acoustic impedance of the sealed ear would provide a force on the diaphragm more or less equal to the force exerted by the pressure from the other side, which on other IEMs most likely would have been very high since you just encounter the shell's completely sealed and low-air space.
It seems reasonable that removing the pressure gradient across the tympanic membrane would allow the membrane to move freely in either direction. One could call it the equivalent in sound to lowering impedance in electronics. That makes them more analogous to the situation with speakers. Speakers give great sound stage and spatial clues. IEMs have two major differences to overcome to be more like a speaker--I'm not sure as good as a speaker will ever apply--the first is of course the unnatural way in which the sound arrives at the membrane, and the second is the pressure differential across the membrane created by the sealed system. ADEL may indeed eliminate one hurdle to more natural sounding audio reproduction.
It would be interesting to run this by the sound science threads.
The hypothesis seems plausible to me, to a degree, but it fails to take into account whether or not the BA drivers themselves are vented. If not vented, then it falters to a significant (though not 100% absolute) extent.
Switching between the A12 and V6-Stage leaves me thinking the addition of ADEL is going to make those who backed the U6 & U8 really happy. At the KS pricing they could go down as one of the best iem deals ever.
The hypothesis seems plausible to me, to a degree, but it fails to take into account whether or not the BA drivers themselves are vented. If not vented, then it falters to a significant (though not 100% absolute) extent.
That may be a very good point. I don't actually know a lot about the difference in mechanical design from a BA to any other type of driver. I'm really curious about the overall design of the system now. Anything to say about this, Vitaliy (I know you're here)?
That may be a very good point. I don't actually know a lot about the difference in mechanical design from a BA to any other type of driver. I'm really curious about the overall design of the system now. Anything to say about this, Vitaliy (I know you're here)?
(re-posted from here: http://www.head-fi.org/t/578855/things-to-consider-before-getting-your-custom-iem-impressions-done-the-perfect-fit#post_7871678 )
Also see: http://en.wikipedia.org/wiki/Headphones#Balanced_armature
I must admit, there seems to be a little ambiguity as to whether or not the 'rear' side of a standard BA diaphragm is exposed to outside air pressure or not - the first video seems to imply that it is, yet I know that some CIEM makers (UM, for example) are very deliberately implementing venting in their BA driver casings (I suspect to favourably alter the bass response, and perhaps transient response, amongst other possibilities).
Food for thought...
PS: I welcome any input or corrections from anyone with a deeper technical understanding, including Vitaliy!
I must admit, there seems to be a little ambiguity as to whether or not the 'rear' side of a standard BA diaphragm is exposed to outside air pressure or not - the first video seems to imply that it is, yet I know that some CIEM makers (UM, for example) are very deliberately implementing venting in their BA driver casings (I suspect to favourably alter the bass response, and perhaps transient response, amongst other possibilities).
Food for thought...
PS: I welcome any input or corrections from anyone with a deeper technical understanding, including Vitaliy!
That's some great stuff, Mython! I'm shocked I wasn't aware of those resources beforehand. It'll take me some time to get through everything with how busy I am these days.
Also, I can't remember exactly, so I may be wrong, but in one of the videos, I think I saw a hole in the BA driver on the back side where the the wires also additionally hook up to. Could those be the vents?
Does it make a difference that the drivers themselves are contained in a closed shell whose only openings are into the ear canal in which the casting makes a plug?
It's still a closed system, albeit with slightly more volume. This is beginning to remind of a miniature speaker box with two or more compartments and/or drivers like isobarics (but not exactly). The semi-closed or partially vented behavior can obviously be tuned by the designer to produce all sorts of subtle effects.
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