• 𝕊𝕦𝕓-𝕓𝕒𝕤𝕤: Deep and present without overwhelming. The slam of low frequencies is noticeable with weight and extension, but without invading the rest, adding body to genres with marked bass.
• 𝕄𝕚𝕕-𝕓𝕒𝕤𝕤: Slightly warm and with good thickness, it gives fullness to low notes without mixing with the mids, keeping rhythmic lines defined, with tact, precision, and speed.
• 𝕃𝕠𝕨𝕖𝕣 𝕞𝕚𝕕𝕤: Pleasant and clean texture, with enough energy not to sound dull. They help the music maintain rhythm and force without saturating other areas.
• 𝕄𝕚𝕕𝕤: Natural and transparent, with enough presence for melodies to be heard clearly and directly, without feeling hidden or dark.
• 𝕌𝕡𝕡𝕖𝕣 𝕞𝕚𝕕𝕤: Quite “cheerful” and with sparkle, where I could appreciate clarity and brightness. They give life to the mix, although they can feel too lively if you are used to softer profiles.
• 𝕋𝕣𝕖𝕓𝕝𝕖: Extended and with good clarity. They add air and definition to the upper part without becoming strident, although with the black filter there is a more vivid than smooth approach.
• 𝕍𝕠𝕔𝕒𝕝𝕤: Deep male vocals sound complete and warm, with very accurate depth; normal male vocals with good clarity but perhaps with little thickness, not sounding entirely very natural; and female vocals with detail and lightness without becoming harsh or unnatural.
• 𝕊𝕠𝕦𝕟𝕕𝕤𝕥𝕒𝕘𝕖: Moderate space. It is not very wide, but with a successful three-dimensional sensation that separates instruments well without feeling boxed in.
• 𝕀𝕞𝕒𝕘𝕚𝕟𝕘: Quite orderly and consistent. The localization of sources is clear and reliable, which makes it easy to follow the music without spatial confusion.
• 𝕃𝕒𝕪𝕖𝕣𝕚𝕟𝕘: Separates layers effectively, allowing background elements to be distinguished from the main ones, although in very dense passages it can feel somewhat simpler.
• 𝔻𝕖𝕥𝕒𝕚𝕝 𝕣𝕖𝕥𝕣𝕚𝕖𝕧𝕒𝕝: Surprisingly good for the price range where this Klean is located. I was able to perceive micro-details that raised the listening quality considerably.

𝐒𝐢𝐧𝐠𝐥𝐞-𝐩𝐥𝐚𝐲𝐞𝐫 𝐯𝐢𝐝𝐞𝐨 𝐠𝐚𝐦𝐞𝐬:

Check my blog to know under what circumstances I analyze sound in this field. Source used FiiO K11 with filter no. 5 (neutral), stock ear tips, and gain on low.

• 𝔸𝕔𝕥𝕚𝕠𝕟: Bass impacts are felt with weight and authority without being excessive. Explosions and hits have body without saturating, excellently represented, adding quality to these moments, and the reverberation adds realism to the scenes. The cinematic experience that I always seek was well represented.
• 𝔻𝕚𝕒𝕝𝕠𝕘𝕦𝕖𝕤: Very clear and natural, the characters’ voices are smoothly distinguished from the effects, which makes it easier to follow conversations and narrative in a clarifying way, where, if needed, the voices turn out to have exquisite prominence.
• 𝕀𝕞𝕞𝕖𝕣𝕤𝕚𝕠𝕟: Environmental sounds are perceived with detail, enriching the atmosphere without eclipsing the main effects, which helps with the sense of space, of feeling inside, and of realism.
• 𝕃𝕒𝕪𝕖𝕣 𝕤𝕖𝕡𝕒𝕣𝕒𝕥𝕚𝕠𝕟: The different effects remain clear and differentiated even in complex scenes, with few confusing overlaps. It handled well the densest and most chaotic scenes of the video games I use for my tests.
• 𝕊𝕥𝕒𝕘𝕖: The frontal and lateral stage conveys good size for an IEM, offering dimension without feeling narrow. However, in terms of verticality it falls somewhat short for my taste, with an artificial and unrealistic distance.
• 𝕊𝕚𝕓𝕚𝕝𝕒𝕟𝕔𝕖: Well controlled in general, but with the black filter there can be a bit more energy up top. It can become somewhat annoying at times.
• ℙ𝕠𝕤𝕚𝕥𝕚𝕠𝕟𝕚𝕟𝕘: It allows sounds to be located with stability and coherence, making enemy movements or directional events be followed with confidence of appreciating a correct location.

𝐅𝐢𝐧𝐚𝐥 𝐜𝐨𝐧𝐜𝐥𝐮𝐬𝐢𝐨𝐧 𝐚𝐧𝐝 𝐩𝐞𝐫𝐬𝐨𝐧𝐚𝐥 𝐞𝐯𝐚𝐥𝐮𝐚𝐭𝐢𝐨𝐧𝐬:

Kefine Klean is an IEM for everything, that masterfully handles any musical genre or content you put in front of it. I have not been able to feel that in anything it did not defend itself with excellent results.

Personally, I highlight its rhythmic capacity, noting well-defined and fast transitions between frequencies, technical, where the resolution is maintained, giving a gratifying and joyful listening, very balanced, where nothing stands out, everything is at a high level.

In single-player video games, my preferred field to analyze sound, the performance is excellent, but it could have been outstanding if in the densest moments it had behaved in a more clarifying way. Perhaps it is asking too much of a budget IEM; it may also be the fault of being used lately to higher ranges, but even so, I find no possible rival that can compete with Klean in this field.

It is no longer just an impression or something anecdotal for me: Kefine knows how to tune its products very well, with that characteristic touch of strength and dynamism that they implement in their monitors, without neglecting other aspects.

I knew from the community that Klean was an excellent option. What I was not convinced of is that it was, possibly, the best if what you like is to enjoy everything and with sovereign quality.

𝐑𝐞𝐜𝐨𝐦𝐦𝐞𝐧𝐝𝐞𝐝 𝐟𝐨𝐫eople who like energetic listening without losing detail or single-player video games of any kind.

𝐍𝐨𝐭 𝐫𝐞𝐜𝐨𝐦𝐦𝐞𝐧𝐝𝐞𝐝 𝐟𝐨𝐫: lovers of large soundstages and/or those sensitive to treble.

If you have made it this far, 𝐭𝐡𝐚𝐧𝐤 𝐲𝐨𝐮 𝐟𝐨𝐫 𝐫𝐞𝐚𝐝𝐢𝐧𝐠.
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𝐒𝐞𝐞 𝐲𝐨𝐮 𝐢𝐧 𝐭𝐡𝐞 𝐧𝐞𝐱𝐭 𝐫𝐞𝐯𝐢𝐞𝐰

 𝐃𝐢𝐬𝐜𝐥𝐚𝐢𝐦𝐞𝐫:

This set of monitors has been sent by 𝐊𝐞𝐟𝐢𝐧𝐞. I sincerely appreciate the opportunity to be able to test one of their products at no cost and that no condition has been imposed when creating this analysis.

Despite this, my priority is to be as impartial as possible within the subjectivity that analyzing an audio product entails. My opinion belongs only to me and I develop it around the perception of my ears. If you have a different one, it is just as valid. Please, feel free to share it.

 𝐌𝐲 𝐬𝐨𝐮𝐫𝐜𝐞𝐬:

-FiiO K11 for music and video games on the main PC.
-FiiO KA13 while I work.
-FiiO BTA30 Pro + FiiO BTR13 for LDAC wireless listening at home.
-FiiO BTR13 + FiiO BT11 + iPhone 16 Pro Max for wireless listening on the street.
-FiiO KA11.
-FiiO JA11.
-FiiO Jiezi.
-BQEYZ Lin.
-Shanling M0 Pro.
-Amazon Music Ultimate.
-Local FLAC and MP3 files.