H20

I have the ISN H20 and they're wonderful, better than many more expensive IEMs. My absolute favorite is the Aful Explorer, followed by the ISN H20, above the Lesthouer S08, Hidiz MP145 and MP143, Kefine Delci AE, etc.

The best IEMs in terms of quality and price, with a warm, neutral sound with wonderful bass, organic, musical mids, and smooth highs with an analog timbre!

Kinera celest ace 2.0, Kinera leyding, nicehck black cat ultra, nicehck red lava and nicehck berry jam.

The audio is evocative; it's all a matter of personal taste. I have the ISN H20 and I really like it compared to other IEMs under $100. I like the warm audio signature with deep, punchy bass, organic and musical mids, and smooth, extended highs. It's all a matter of taste.😵‍💫👀

https://preview.redd.it/5wmokt6k97if1.jpeg?width=4000&format=pjpg&auto=webp&s=6137cb829be29f7f175621e0387699ef07e5777d ISN AUDIO H20 and Nicehck black cat ultra.

It really hasn't surprised me like the others I have, although I like the audio signature and the musical interpretation I feel like something is missing and I don't know what it is. Maybe I should wait a longer number of hours of break-in for the drivers to settle. Another thing that catches my attention is that it needs power to work better, I have a fiio jm21 dac and I have to turn up the volume to 85 decivels so they can breathe properly, the standard cable by far was the one that best helped to open up the sound, I tried several cables and always went back to the standard cable, luckily it's a good cable as well as beautiful, I think Penonaudio manufactured the cable with the Penon Quattro in mind. I'm asking you what eartips I can use to improve the dynamics. I'm using the Tangzu Sincai Valanced. Overall, I hope it improves as the drivers burn in. I really like it, since I'm looking for that underground chi-fi sound from Penonaudio. Buying from Penon is a guarantee of quality. What can you suggest to improve the performance of the Penon Quattro?👍

Between the QOA Adonis New and the ISN H2O, the one I listen to the most is the QOA Adonis New, but in general the one I use the most is the ISN EST80.

The ISN H20 is a superb IEM with deep, punchy bass, organic and musical mids that are somewhat repressed with a certain filtering of the low mids, creating a sense of warmth and weight in the notes without muddying the mids, and smooth, dark highs that complement the tonal balance very well. This IEM is more musical than detailed. The QOA Adonis New is superior and more enjoyable overall. The bass is deeper and more detailed, more defined than in the H20; the mids are present, organic, and dense with a certain level of detail; the vocals are prominent and sweet; and the highs are smooth and extended without being bright or sibilant. I don't listen to EDM, but in general, I prefer the QOA Adonis New, which is a very underrated IEM. The ISN H20 is very good, among the best in its price range.

I don’t have much experience with IEMs, but I listen almost exclusively to metal. My first pair was the KZ PRX, which sounded really good to me after heavy bass boost and a cut at 8kHz with parametric EQ — fast bass, good separation, high resolution — but without EQ they were weak for metal. Later I picked up the ISN H20 on sale, and I was worried they might be too bassy for metal. Nope. They handle everything really well, very enjoyable sound. The bass isn’t as fast as on the PRX, but in my opinion it has more detail, air, and a more natural impact. On top of that, the ISN H20 (at least for me) doesn’t need any EQ at all and sounds good from any source. I can recommend both pairs, but if you don’t want to mess around with EQ and don’t mind a warmer tuning, check out the H20.

None of these. Definitely ISN H20. It competes with and beats out many iems twice and thrice it's cost.

I spent way too much time searching, but I finally found something that brings me joy in every way, and I don’t long for anything more: the ISN H20. The Penon Liqueur ear tips in the right size added a bit more to the sound as well. I think these cost less than the budget you have for this. But don't forget it's a very subjective hobby.

I'll tell you my hifi story. If there's anything useful in it, use it. I've been into hi-fi for 25 years. First of all, I was constantly developing my big system, according to actual trends, and chasing the perfect sound. Then, about 10 years later, I realized that there is no such thing as a perfect sound, because everyone has different personal preferences in this, just like in food, music, movies, partners... I had to find what my preference was after that. Important. What sounds wonderful suddenly may be terribly annoying an hour, a day, a week, or a month later. It took another 5 years before I realized that being analytical is interesting when I'm testing a system, but it makes me tired and tense in the long run, and I don't like listening to such a system. What I need is not the perfect frequency curve, but analog naturalness, space, body and soul. At that point, I can listen to the system for days. It's been 7 years since I found what has made me happy ever since. I sold everything and started building again. Singxer SX-1, Little Dot mkVIII se, a custom diy Pass Labs Alpeh 5, ProAc 2.5, plus a Beyerdynamic Amiron Home is my current chain and hopefully it will remain like this until the end of time. And how did this come to be here? For travels I was looking for a similar feeling in IEMs, but I didn't find it for long. I bought a few and sold quite a few IEMs, because what was good on paper and in tests still failed my personal test: on the long run, I didn't enjoy listening to music with them. Then I changed my concept and started looking at my own needs again, and the second time I got what I was looking for. A cheap IEM that is not extra in anything, but is usable but first of all enjoyable in everything, the factory cable is okay and brings what I was looking for in my big system. It has space, body and soul, ergo presence. ISN H20. 65 dollars. Paired with UAPP and my old LGV50 as a DAP in high gain mode, I can listen to it for 4-6 hours a day without getting tired. In fact, I've been neglecting my big system lately.

they are dark sounding,high notes are to pulled back.i got them today and i'm gonna send them back.Not a good set for female vocals.

Thans for the impressions. Just what I needed.  I ordered the Kiwi Étude and the ddHiFi E14D Surface but was having doubts. Wanted to return those (without listening to any of them) in favor of the top pro. I am glad I didn’t. Especially the shouty mids remark was a red flag for me. Also I am treble sensitive and like elevated bass. As far as I can conclude these are not for me. Please correct me if I am wrong 🙂 I know there is a big price gap between these three but since I received the ISN audio H20 two weeks ago I came to the conclusion that price doesn’t say crap as the H20 (69,95) outperforms some of my 300+ IEM’s like the Tansio Feat, Kiwi Punch, Deuce, Knoble Knight and Doscinco to name a few. 

Owned them. The Kbear Cepheus destroys them. Better yet, the ISN H20 also does for even less money. But they are decent though.

I just got some ISN H20’s that I like. If I can catch them on sale again, I might be in for a second pair. I like the qkz x hbb too.