Because Liberty Air 2 really needs it. It is impossible to listen them on high volume.
Their lows (bass) are too overemphasized through the whole low and mid bass frequency ranges, which makes the sound muddy and heavy.
Their highs (treble) are not so good too, because of some peaks in mid treble, which makes listening to sharp female vocals somewhat painful in some cases.
I’m not a “loud sound maniac” but I think it is crucial to have a possibility of clear “lound listeting”, because we dont have ANC on Liberty Air 2. And their passive noice canceling is not perfect in a public transport.
Here’s some relevant FR measurements https://www.rtings.com/headphones/1-4/graph#1663/3992
Before you ask:
Yes, I’m using Soundcore APP custom EQ + Deezer EQ to lower some problematic frequencies. That’s the only way I can listen Air 2 at least with a medium volume. But some songs in my playlist are still kinda hard to listen.
No, I dont wanna use third party players because all my music located in the streaming services, or third party EQ’s cause they are not reliable.
Yes, my earbuds are working just fine.
I’m using Xiaomi Mi 9 SE.
Aptx codec is working fine.
So, it this possible to fix FR via firmware update? Or frequency response depends on construction of the earbud or other properties?