ShakeThoseCans
100+ Head-Fier
I'll have to look into those, I think I remember the V90 being mentioned in a few comparisons I looked at. Helps to have input on those from someone who doesn't do well with tons of treble, thanks!
Just a note on the C12 and CCA. I have the C10, and it actually kind of relates to your specifications. If there's one thing I can say about the C10, it's "Clarity." The "Clear Concept Audio" brand is not a misnomer. Voices are among the clearest I have on any IEMs, including ones that cost 8x as much.
And the C10 is smooth. It went in the direction of rounding off peaks and removing harshness. The C10 is known as a 'clear sounding, but maybe boring' IEM, and that's accurate. If you're concerned about peaks, harshness, and brightness, the C10 addressed a lot of those problems, but at the expense of excitement (for some). The C10 is mid-focused, it's beefy in the midrange.
Based on its reputation and user comments, the C12 is trying to provide a somewhat analytical, reference sound. Its treble is more aggressive and probably brighter than the C10. It may even be more peaky in the treble than the ZSX.
Honestly, the C12 is a pretty low-risk purchase for you. Even though it is a little harsher than the ZSX and C10 maybe, it's not designed as an aggressive IEM. For $30, you can afford to make a potential mistake here. However, you might also wish to consider a C10 at $20, as it is the most polite and inoffensive Chi-Fi IEM I have ever heard.
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I also just started testing a V90 yesterday. So far, it seems smoother and softer than expected. It does not have a supercharged treble like the V80, it seems to be a more polite tuning. I haven't experienced much in the way of harshness or peaks yet. Bass is powerful, maybe a little boomier than I like. If you are looking for a bass-oriented IEM with non-harsh tuning, the V90 might be it.
However, I have ordered the TRN BA5 because I would like a TRN that is less bass-focused, and I've heard good things.
In conclusion, you should seriously consider the V90 (non-harsh bass), ZSX (a less-harsh KZ), and the C10 (smooth and polite). The C12 is also a low-risk option.
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