Kinera Celest Relentless Wired Headphones Review – Presentable and Awesome

Kinera Celest Relentless

8Expert Score
Sound of Kinera Celest Relentless

Has a pronounced Harman sound with bright high frequencies.

Overall Presentation
8
Low Frequencies
8
Mid Frequencies
7.5
High Frequencies
8.5
Detail retrieval
7.5
Soundstage
7.5
Construction
9
Pros
  • Well-defined bass
  • Bright high frequencies
  • Above-average detail retrieval
  • Attractive design
  • Excellent accessories
  • Comfortable fit
Cons
  • Dampened mid frequencies
  • Quite narrow soundstage
  • Cable color doesn’t match the headphones

Along with the KINERA Celest Wyvern Abyss model, I also received Kinera Celest Relentless for review. Relentless wired headphones attract attention not only with their stylish design, but also with their hybrid -1DD+6BA construction. Let’s test this in-ear model and see how it performs in reality.

What does the manufacturer offer in Kinera Celest Relentless IEMs?

  • Celest has equipped the Relentless model with seven drivers, including an 8mm dynamic driver for powerful bass and midrange frequencies.
  • Two Celest 29689 drivers deliver clear and transparent high frequencies.
  • Four Celest 10012 balanced armature drivers ensure flawless reproduction of the upper range.
  • The package includes eight pairs of eartips (vocal, balanced, and foam) and interchangeable cable connectors for 3.5mm and 4.4mm jacks.

Kinera Celest Relentless In-Ear Headphones – Sound

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  • Overall Presentation — 8: The Kinera Celest Relentless performs best with neutral sources and quality cables. When listening to Dave Brubeck’s “Take Five” through a silver-plated cable, the sound becomes more transparent and detailed. The earphones are tuned to the Harman Target 2019 curve, giving the sound musicality and emotionality. Equipment selection is critical for achieving the best sound, especially in the high frequencies and soundstage.
  • Low Frequencies — 8: Handled by a custom 8mm dynamic driver. The bass is powerful and well-controlled, but the sub-bass lacks depth. In The Weeknd’s “HEARTLESS,” the sub-bass feels less extended, although the mid-bass in R.E.M.’s “Oh My Heart” remains dense and engaging. The low frequencies seem somewhat dry. The bass sometimes bleeds into the lower mids, which can blur the overall sound, but overall, the controlled bass is suitable for those who appreciate pronounced mid-bass.
  • Mid Frequencies — 7.5: Clear, but vocals sound distant. Male vocals in Bill Withers’ “Ain’t No Sunshine” lose richness, while female vocals in Caroline Polachek’s “Desire, I Want to Turn Into You” sound better but not perfect. Instruments like the guitars in Eagles’ “Hotel California” retain energy, but the mids feel dampened. Overall, the mids are aimed at musicality, which may not satisfy those who prefer more natural sound.
  • High Frequencies — 8: Handled by four custom balanced armature drivers, adding detail and airiness. In Queen’s “Don’t Stop Me Now,” the highs may seem overly bright and fatiguing for extended listening. However, in calmer genres like classical music, this brightness can add expressiveness.
  • Detail retrieval — 7.5: The detail in the Relentless is high, especially in the upper range. In Debussy’s “Clair de Lune,” all the nuances of the melody are audible. However, in the lower and mid frequencies, details lack depth, as in Norah Jones’ “Come Away with Me,” where vocals and instruments sound less refined. This could be due to the emphasis on a V-shaped signature, leaving the mids subdued. Listening to a gramophone re-recording is unpleasant due to the constant crackling of the vinyl record.
  • Soundstage — 7.5: The soundstage in the Relentless is average, feeling close to the listener, and doesn’t scale well with increased volume. In complex tracks like Queen’s “Bohemian Rhapsody,” the blurring of the soundstage becomes noticeable. In rock and metal, the stage isn’t clear enough, reducing the overall impression.
  • Conclusion: The Relentless offers balanced sound with some drawbacks. They are suitable for those who appreciate powerful, slightly dry bass and detailed high frequencies, but they require careful equipment matching to achieve optimal sound. These earphones will appeal to fans of bright highs and expressive bass but may not satisfy those seeking a more natural and even sound.
Kinera Celest Relantless

Comparison with competitors

  • In this price category, I selected Truthear Nova and Simgoot SuperMix 4 for comparison among hybrid earphones. Simgoot SuperMix 4 left me with mixed feelings, just like its competitors. The low frequencies in SuperMix 4 are poorly executed, although I generally liked the sub-bass. The subdued lower midrange and the emphasized upper mids with sibilant sounds didn’t appeal to me, but the high frequencies were generally satisfactory. Compared to the Celest Relentless, the Simgoot SuperMix 4 is clearly the underdog.
  • I really liked the Truthear Nova earphones, with the only issue being the lower mids, specifically male vocals sounding quieter than female vocals. Apart from that, the Nova impressed me with its flat frequency response and clean, mature sound. In comparison with the Celest Relentless, the Truthear Nova is the definite winner.
9Expert Score
Convenience

Aesthetically pleasing, visually striking, and ergonomically comfortable

Kit
9
Design
8
Comfort
10

Design, kit and comfort – Kinera Celest Relentless

Kinera Celest Relentless come in an attractive package with high-quality printing and detailed information on the back. Removing the protective sleeve, you immediately realize that the designers put in effort to create an appealing “wrapping” for the customer.

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  • Earphones: As is customary with many manufacturers, the earphones are placed in soft foam with the faceplates facing the buyer. The faceplates are covered with a protective film that conceals unique hand-made patterns resembling sea foam or waves. In the center, there is a calligraphic “Celest” inscription. The earphone shells are made of transparent resin, revealing the internal components. The design of the shells is ergonomic, featuring a well-placed sound tube protected by a mesh, and a small compensation hole near the connection socket. When worn, the earphones do not produce any unwanted diaphragm movement sounds, and prolonged use does not cause discomfort. However, it’s worth noting the absence of right and left earphone markings, which may complicate correct cable connection for less experienced users.
  • Cable: The cable is dense yet soft, with an attractive appearance resembling a braided thread in metallic white. The chrome connectors look impressive. However, the appearance of the cable does not harmonize well with the dark blue faceplates of the earphones. The earphone connectors are marked with “R” and “L” letters. The interchangeable Jack connector (3.5 mm and 4.4 mm) features an original design that prevents accidental disconnection.
 
Kinera Celest Relentless
  • Eartips: The eartips are available in three variations:
    Celest 221 Vocal Eartips: Enhance high frequencies and improve vocal clarity;
    Celest 608 Balanced Eartips: Provide a balanced stereo sound;
    Celest Foam Eartips: Offer rich vocals and deeper bass.
    The selection of eartips is quite diverse.
  • Case: The earphone case is dark blue, with a standard design and branding. It is neatly crafted and includes a mesh organizer inside.

Set – 9
Design – 8
Comfort – 10

 

Kinera Celest Relentless Features

  • Hybrid driver configuration: 1 dynamic + 6 balanced armature drivers.
  • 8 mm dynamic driver.
  • Sensitivity: 105 dB.
  • Frequency range: 20 Hz — 20 kHz.
  • Impedance: 27 ohms.
  • 5N silver-plated copper cable.
  • Earphone connector: 0.78 mm, 2-pin.
  • Interchangeable plugs: 3.5 mm Jack and 4.4 mm Jack.

What’s in the Kinera Celest Relentless box?

A commendable set:

  • Headphones.
  • Cable.
  • Interchangeable plugs for the cable: 3.5 mm Jack and 4.4 mm Jack.
  • Three types of eartips:
    Celest 221 Vocal Eartips: Enhance high frequencies and improve vocals.
    Celest 608 Balanced Eartips: Provide balanced and stereo sound.
    Celest Foam Eartips: Offer rich vocals and deeper bass.
  • Dragon-themed bookmark.
  • Case.
  • Instruction manual.

Kinera Celest Relentless Conclusion

Kinera Celest Relentless

The Kinera Celest Relentless impresses with its balance and detail but isn’t without its nuances. The slightly dry low frequencies might seem less rich, but they offer good speed and control. The mid frequencies are clear but sometimes lack naturalness, especially with male vocals. The high frequencies are airy and detailed but can be sharp for long listening sessions. Overall, these headphones are suitable for those who value precision and articulation but prefer not too aggressive bass and clean, well-defined highs.

The Kinera Celest Relentless offers a comprehensive and thoughtful approach to design and packaging, evident right from the unboxing. These headphones attract attention with their build quality and aesthetic design. The ergonomic design ensures comfortable wear, and the variety of eartips allows for an optimal fit for different musical preferences. However, there are drawbacks: the lack of clear side markings and the mismatch between the cable style and the faceplates. Overall, the Relentless impress not only visually but also with their functionality, offering good value for the price.

The Relentless evoked mixed emotions for me. On one hand, they provide a dry sound signature in the low and some mid frequencies with a punchy bass. On the other hand, the high frequencies are bright and accentuated. Such sound may not satisfy demanding audiophiles, but those who enjoy bright, emotional highs and dry lows with prominent midbass might find them interesting. The high-quality and well-crafted package also makes them an attractive gift.

If you’re a seasoned audiophile, these headphones might not be for you. But if you’re a young enthusiast or looking for a presentable gift, they are worth considering.

Viktor Ivanovich
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