This is going to be long:
Summary: I’m going to return Aonic 50 due to the glitch issue (pause in sound for fraction of second). I was at a loss whether this is design issue or particular unit issue. But I don’t plan to get replacement. My search continues. I think I might go for wired headphone. Or I might get AONIC 50 version 2 if that comes out in the future. I don’t need wireless; I already have Apple AirPods, AirPods Pro. I don’t need ANC, as I have Shure SE420 IEM for airplane travel.
Sound Glitch
I reported previously about the glitch that I encountered. I now believe it has to do with multipoint paring. But it still can occur if I’m only connected to 1 device (but have being paired to multiple devices).
The occurrence rate varies. On some days, no issue for hours. Then there are other times, glitch occurs every couple minutes, to around 3-4 times every hour.
This was the worst instance. I am connected to 2 devices (MacBook Pro and iPhone Xs Max). I was be listening music on device 1, then I hear the glitch. I noticed there were text messages on my iPhone. But the glitches do not exactly match the notification on iPhone. But I continue to get the glitch every minute or so. So I on the 2nd device (iPhone), I started to play music. Now the glitch became continuous jumbled noise. So this suggests the glitch is due to multipoint pairing. And sound from 2nd device is somehow causing conflict.
Then this other case should not have any issue with multi pairing. I’m outside at park with only 1 device, my iPhone. I don’t have any other device with me. And no one else is within at least 100 feet. So there should not be any multipoint pairing or or any bluetooth interference. And the glitch still occurred, around 4-5 times over 1.5 hour period. And I turned off/on the headphone, but that did not fix the issue.
I have used ShurePlus Play app to Clear Paired Device List and Restore Default Settings. But after I pair multiple devices, the issue still exists.
I tried to pair to 1 device only (and only 1), after Clear Paired Device List. I tried this for 5 hours and seems OK. It is not long enough to say this definitely is the solution. However, to me, this is not usable. I have 1 iPhone, 2 MacBook Pros, 2 iPads. There is no way I want to Clear Paired Device List or Restore Default Settings every time I change device.
And the interesting thing is that I got Sony WH-H910N h.ear on 3 right before this. It also had weird glitch issue. On Sony, the glitch is worse. When it happens, the sound can be distorted going forward (like sound from seconds ago gets mixed in with current sound). At the time, I thought it had to do with bluetooth interference. It didn’t matter, as I was going to return the Sony anyways because the SQ sux.
Both Sony h.ear 3 and A50 have exactly the same multipoint pairing feature. Both can be connected to 2 devices at same time; sound can be played from only 1 device at a time. And both can remember up to 8 last devices. I wonder if they both use the same 3rd party chip, and thus the issue occurred on both of these headphones.
I don’t really care for multipoint pairing. I wish this feature doesn’t exist.
With similar issue on 2 different brand/models, it’s possible the issue is on the source side. However, even with only 1 paired device within range, A50 still had the glitch. And I also have 5 different sources, and issue occurred on all of them. In any case, doesn’t matter if root cause Operating System, bluetooth protocol, headphone issue, or whatever, this issue is a show stopper for me.
Sound Quality
I have Aonic 50 for 1 week. I like it, 95% of time. There is that 5% of time listening to certain music that I wish it has more oomph!
My old headphone is Audio-Technica ATH-A700. So that is my main comparison. My other listen devices are earphones (AirPods, AirPods Pro, Shure SE420); so not comparable between earphone and headphone.
A50 is definitely flatter than A700. Mids are good and vocals/voices sound great, which is a great improvement over A700. A700 has V-shape response: OK bass, weak mid, strong high; vocals sound thin on A700. I really like A50 for the vocals. And A50 sounds great for larger variety of music.
A50 is clear and can hear all the instruments, just like A700. However, the instruments that stands out differ between A50 and A700. On A700, because of the high emphasis, cymbals stand out. Sometimes this sounds more exciting. But then in other music, A700 sounds off because mid is weak.
Surprisingly A50 sound stage is not as wide as A700. A700 feels and sounds very airy. But after comparing A50, A700 sound stage seems a bit artificial, because vocals and some instruments sound like they are from back of the room (too far back). A50 soundstage just sound more realistic and also more enjoyable.
This part is a bit hard to describe. Sometimes, after listening A50 for couple hours, then certain rock song comes up, I feel the sound is too flat. This is especially true when volume is low. I have to crank up the volume and the music sounds better. Then when I do A/B comparison between A50 and A700 on the song that I thought A50 was flat, A50 still sounds better. I think I get used to that A50 sound and need some change or comparison to kind of realize or appreciate the sound quality.
Analog cable without power
Volume is lower without power. Sounds good, but it doesn’t sound as good as with power on; very close though. Hard to tell or describe of the difference. I guess that is how close the SQ is without power. This was huge difference compared to Sony h.ear on 3, which sounded ridiculously bad without power, like AM radio.
Comfort
A50 ear cups are smaller than I expected. I wish they are larger, particular more depth. My ears do touch the lining covering the drivers.
I have used the headphones for 2-3 hours at a time. Although it is not uncomfortable, once I take the headphones off, I do feel relaxed and the pressure around my ears is released. So it is definitely not as roomy or as comfortable as A700. Audio Technica has this weird wings that go over the head. But that is not the main factor; it’s the very large ear cups that really make it comfortable.
Also, A50 is quite hot and sweaty.
Noise Cancellation
I have Shure SE420 in-ear monitor passive noise cancellation for travel and plane rides. So ANC is not important to me. I briefly tested this. ANC has 2 settings (Normal and Max) that can be controlled from ShurePlus Play app.
Normal ANC: I don’t hear much difference in SQ between ANC on Normal setting vs off, which is good. But the ANC effect is also quite minimal. There is a bigger difference from no headphones to to passive isolation (headphone on with ANC off), than from passive isolation to ANC on Normal.
Max ANC: When ANC is turned to Max, then I do hear more noise reduction kicking in. Sony WH-H910N h.ear has more effective ANC. On A50, there is noticeable reduction in volume, there is a background hiss, and there is some cabin pressure. Hard to tell if SQ is different except the volume difference.
Blue light
When the unit is on, the blue light flashes. At first I though this will be annoying, but it is actually useful. Because I often just take off the headphones and put my desk without turn it off. Then when I see the lights, that prompts me to turn off the unit.
Negative
Headphone has very strong plastic or rubber VOC outgassing and smell. Man, when I first open the package, it smelled like it was painted just hours ago. And that smell lingered for days. Even after 1 week, it still smells. And the worse culprit is the interior of the case. Shure should change this for consumer health and the environment.
And the deal breaker for me is the sound glitch mentioned above.