25 €

Review published:




per Side






17 Ohm











102 dB








Daily Life


20 - 20000 Hz


On my little round trip through the Chi-Fi universe I came across a "little" IEM pearl, which I don't want to withhold from you. It is a DIY-In-Ear, which is also marketed by PAIAUDIO as DR2. Nevertheless it is an OEM-IEM, in which the respective "manufacturers" can engrave their logo. For example, my copy has the PI engraved (PAIAUDIO), but I have already seen other logos on it.


The extraordinary thing about the DR2 is that the case is completely cast in resin. And when I say complete, I mean it because there's no cavity. The dynamic driver is basically preserved in the case and only has a small tube outside to "breathe". For this purpose, another, thicker tube leads to the sound opening. All this is completely surrounded by resin. There are no air bubbles, which speaks for a good workmanship/production. The resin piece is also free of coarse unevenness and rough spots.

The DIY DR2 does not only look like a custom IEM, it also wears like this. Very ergonomic and secure in fit, it should fit almost any ear despite its size (exceptions confirm the rule).

I can't say too much about the cable, because I decided to order the version without cable, because you can save another 7 € (18 €). Nevertheless, according to the pictures it is a standard MMCX cable made of copper, which will surely serve its purpose.

With a correct fit and ideally foam tips, you can achieve a really good isolation. Since there are no other openings except for the small air hose and we therefore almost speak of a completely closed case, nothing of the music penetrates to the outside, there is also no cavity in the inside and so the sound enters our ears directly without detours! However, there is little or nothing to come through to the inside, which should please especially musicians. But you should be a bit more careful with the in-ears, because resin is not quite as robust and therefore more susceptible to external influences, which could affect the optics in the long run, rather than the function.


Powerful, natural, lively and dynamic with a slight tendency to exaggerate, the DR2 describes quite well.

The bass has an incredible impact, which will put a smile on every bass lover's face. It plays quite linear from top to bottom, while the sub-bass is a bit pushed again. This allows not only to hear the bass to its full extent, but also to feel it. The DR2 gives every genre a good ladle of bass, which tastes good because it is well seasoned, but not salty. Bass guitars sound so energetic and powerful that you inevitably look for songs in your library where they stand out - AnnenMayKantereit - "I'm fine (live)".
Hip-hop is also excellent for the DR2. Due to the low bass there is a lot of taste behind every song. Amazing is the fact that the bass remains controlled and has texture. Sometimes he simply means it too well and starts to get a bit muddy when the music already has a strong bass part.

If you now think that the mids of such a bass machine go completely under, you are mistaken. Of course the bass doesn't manage to leave the mids untouched, but they benefit with a pleasant warmth and a voluminous body. They are clear and detailed and manage to give the bass slogan without having to fight too hard against him. Here as well we have a basic naturalness in sound, especially when it comes to voices. Guitars sound crisp without becoming shrill and trumpets have a natural timbre. In addition, the mids are almost lively and don't hide behind the treble and bass, even if it's a V-signature. However, you should keep an eye on the volume, as the mid-range in the upper range becomes a bit exaggerated, which can be fatiguing, as they have their highest peak between 2 and 5 kHz.

After the mid-peak, the frequency response drops down and the treble returns with a smaller increase of about 10 Hz. They have thus seen an above-average expansion in the price segment and for a single dynamic driver. Here, too, the keyword is natural, although they could be more present in the lower trebles. They are airy and playful, even if they don't show much brilliance now. But there are no sibilants, or a sting in the ear. They can even handle "problematic" voices like SIA's without any problems. They don't reveal every micro detail, but the level of detail and resolution is more than convincing.

The stage is in a good average position as far as the depth is concerned, but the width is quite respectable. The separation is also very good, because instruments rarely overlap (this is partly due to the bad mastering) and can be easily followed.


I am more than surprised and enthusiastic about the sound of the highs, as well as the rest. The bass can take the mountain pines off, but it can also exaggerate. I think if I were to listen to music all day with the DR2, the bass would be too much for me in the long run, but for an extended listening session in between it's just fun. The mids are lively, the voices authentic and the highs convince with their clear, unagitated and detailed way.
If you are looking for some natural, bass intensive and dynamic sound you should take a look here. I also recommend these IEM musicians, who are not looking for absolute, analytical neutrality, but who also need some fun 😉

That's exactly why I love this hobby so much, because now and then in-ears come along, which you don't have any expectations of and are so positively surprised by.



Here the processing plays a role and the usability of the scope of supply. Additionally the appearance, wearing comfort and robustness.

Here I evaluate for me subjectively the price/performance ratio - does not flow into the evaluation!

Z: No Brainer

A: money well spent

B: all right, you can do

C: gives better for less money

D: overpriced

E: collector's price

Daily life:
Here, I focus on the long-term audibility and whether I can hear it well out of the box. This is of course very subjective and therefore only a minimal deduction or bonus. 

(-0.1, 0, +0.1)


Rating in Letters

S: 9.5 - 10

A: 9.0 - 9.4​

B: 8.0 - 8.9​

C: 7.0 - 7.9

D: 6.0 - 6.9​
E: 5.0 - 5.9​

F: 0.0 - 4.9​





Second Opinion


CHI-FIEAR © 2020 by David Hahn

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