Hi, I'm a new HeadFi user and a newbie when it comes to choosing good earbuds/in-ears/IEMs.
My worry is that I will struggle again with the fit. Are the LZ A6 mini considered a good fit for most people? Is there anything I should buy in addition to increase the chance they will fit well in my ears, e.g. a different cable?
If fit is an issue for you [and fit is VERY important in IEMs], then there are IEMs with better and worse fit.
Lets start with the A6 Mini. I just received mine 2 days ago, and while it likes to show off various technicalities, the fit is not what I would call ideal. As you can see from photos, the A6 Mini is kind of large and awkward in shape. The way it is positioned on my ears, the eartips and nozzles actually try to push the IEM out-of-my-ears. It's like it resists going in your head!
Now, you can fix most of this problem by using the right eartips. I, and many others, are getting good fit with Final Audio Type E tips (I am using size L). But Spinfits also work, probably CP100 M or L being the best. I tried it with Spinfits and CP100L might have actually given me the best fit, although a little tight.
What I am saying here, though, is that the A6 Mini has pretty compromised fit out-of-the-box and definitely requires what they call "tip rolling." There's also an argument for replacing the cable, as well.
I can recommend at least 2 cables if you like, you can see the examples on the dedicated A6 Mini thread.
The A6 Mini is not what I could call a particularly ergonomic IEM, and this is a common issue in the Chi-Fi world.
So what are the ergonomic IEMs?
Ergonomic (for me) IEMs
TRN BA5 > Semkarch CNT-1 > CCA C10 > KZ ZS-10 Pro > TRN V80 > Sony MH755 (with cable extension) > KZ ED9
Mediocre fit:
TFZ King Pro (good fit, but big and heavy) > TRN V90 (good housing, but you need to roll tips), Y*nY*o V2 (needs foams)
Poor ergonomics (but still worth buying)
A6 Mini, Tin Hifi T2, KZ ZS-7 and of course the execrable (in terms of fit) BLON BL-03. Other people say that the fit of the old ****-**** was questionable, especially with the stock tips (which, ironically, may work well on the BL-03). People also complain about the KZ ASxx models.
Those are my personal experiences. So to present a more general picture, most people in general say that the CNT-1, C10, ZS-10 Pro, and maybe V80 have good fit. The ZS-10 Pro has a reputation as one of the better-fitting KZ earphones.
On the flip side, you will find complaints about all of the negative ones I listed, with the BL-03 being the most difficult in terms of fit.
So, what should you do? I am one of the 80% or so of CNT-1 users who found the shell particularly snug and comfortable (a couple people said, alternately, that it was among the worst they had ever attempted. So it's down to ear shape). But you can hardly find a CNT-1 at the good price now. So I wouldn't necessarily look there.
You also mentioned the BL-03. In your shoes, I would wait for the rumoured revision that is coming in a few months, as hopefully they will fix the massive fit issues.
I am not sure that the A6 Mini is the best choice for you. It is one of the my more difficult-fitting IEMs, and requires a definite investment in tips. It literally fights against my ears, trying not to stay in.
In my opinion, you might be best served by the TFZ No. 3. While it is a basshead IEM, it has good technicalities and is known for particularly good fit and isolation. Despite attempts to replace it with various models, it has not really been surpassed. It's so comfortable people take theirs everywhere. It's like a CNT-1 if you can't get a CNT-1.
However, I have a couple of IEMs on the way, and I can let you know about fit compared to the A6 Mini. I have a Tin Hifi T4 on the way (which hopefully improved fit from the T2), and it is a competitor in the price category of the A6 Mini. I also have the LZ A5 coming, which is $29 now, but was about $75 before. It supposedly has nicer fit than the A6 Mini. I also have a CCA C12 on the way, although it's not an extreme upgrade from your existing sub-50 sets.