Hisounaudio HA-2 Impressions
Pros: Dense and plentiful bass, extremely clear mids and highs, great soundstage with some airy feeling
Cons: Lacks isolation

This is my impression of Hisoundaudio HA-2.
HA-2 is a 1BA IEM with the retail price of $99. It will begin selling at approximately mid March.
The design might get revised a bit compared to my HA-2.
I was not able to take picture of packaging or accessories as those weren't provided to me yet, so I will proceed to the sound impression right away.
(Will add pics once I get the packaging.)
Sound impression:
First of all, you need to use eartips with wide diameters. I've tried various eartips and windwhirl eartips works the best for HA-2.
HA-2 have very low distortion with wide bandwidth. It has a flat response but never sounds boring.
Most of the 1BA products have problems such as:
- Cold sound
- Thin sound with weak strength on the sound.
- Small soundstage
- Lacks hitting sense
- Sounds boring
Hisoundaudio explained that they've spend more than 6 years to solve these problems
and finally constructed their own Balanced Armature driver as they were not satisfied at Knowles drivers.
I was shocked at the sound of HA-2 because it seem like Hisoundaudio was not kidding about that. It's no joke.
First of all, the resolution is extremely high.
HA-2 even reveals a detailed sound such as flicking a cord or the singer smacking his/her lips.
It's also quite interesting as HA-2 sounds fun even though it seems like a flat response.
The bass is plentiful compared to many other 1BA products and the bass performs a precise, fast response.
The bass dives deep and the amount of the bass is also rich enough to even play genres like Hiphop without any problem.
The mids are full of richness and it's located very close to your ears. You cannot find any feeling of curtains covering the vocals.
As I stated in the beginning of the sound impression, you can here every detailed sound that you've missed from many other IEMs.
The thickness of the mids are quite neutral and fit well with both female and male vocals.
If I obstinately have to choose the better side, HA-2 will probably fit better with female vocals.
There's very small amount of sibilance which won't be a big problem even for those who are treble sensitive.
HA-2 has a tendency to sound clear and bright without causing any fatigue.
The trebles also sound clear without causing fatigues. The trebles stretches out without any problem.
The treble sounds natural and smooth.
Selectance is perfect. It precisely separates every instruments even when the song contains multiple sounds.
Another interesting fact is that HA-2 uses air flow to produce a wider soundstage and an airy feeling as the Final Audio FI-BA-SS does. The soundstage and the airy feeling is
one of the best among other 1BA products.
HA-2 is probably the greatest budget killer I've tried so far. Hisoundaudio really made a monster this time.
While the HA-2 is in the same league as LZ-A3 and New DQSM does but the price is even cheaper than those two IEMs.
I cannot make a sound comparison as I haven't received the LZ-A3 and New DQSM yet but will upload a review once I get them.
So yeah, I strongly advise you guys to try the HA-2 out. They're worth every dollar you spent on these. As I already said, this is no joke.
Thanks for your attention.