Kworld S28 Gaming Earphones Review

About Kworld…and its gaming earphones…

You would be forgiven if you (like me) are wondering what the heck is Kworld as they are a relatively unheard brand. There are plenty of Chinese audio manufacturing companies that offer different drivers and housing combinations to companies looking to sell earphones under their own brand name.

That said companies still need to check and decide on what combo they would ultimately decide to sell under their own brand. I don’t know if Kworld took this route or they are making their own drivers but I suspect the former. Kworld is a company based in Taiwan and offers quite a few earphones which are at the lower budget end of the spectrum. The earphone on review today is the S28 which is a unique earphone in that it offers two caps that screw into the back of the housing which claims to offer two different sound signatures.

Specifications, Features and Accessories


  • Adjustable sound effect via interchangeable back caps
  • Dual-color TPE flat cable and right-angle plugCall answering / Volume adjustment / Track selection with intelligent control


  • Sensitivity: 95±3dB dB/mW(@ 1K Hz
  • Driver Diameter: φ9mm
  • Impedance: 16 ±15% ohm at 1KHz
  • Frequency range: 20Hz-20KHz
  • Distortion: <= 2% 94dB (20upa)
  • Rated input power: 1mW
  • Maximum input power: 10mW
  • Plug: 3.5mm 4 ping gold
  • Cable length: 1.2m

*Included Accessories:

  • Silicone Earbuds (L,M,S)
  • Memory Foam Tips
  • 1 x Comply ear tips
  • Silicone Cable Tie
  • Back Caps

First Impressions

The Kworld S28 has a standard accessories bundle through the Comply eartip is nice. While Comply tips are very nice and comfortable they don’t last very long and using them exclusively can cost a lot more than the earphone. Comply tips are more comfortable than standard silicon tips and the sound signature can change when using them.

One nice feature is the attached cable tie which can be VERY useful in tying up your earphone when not in use. The built-in mic with volume control is very useful in case you need to make minor volume adjustments, to pause/start the music and if you double tap the mic button you can skip to the next song. However, I should mention a few cautions. I have slightly weirdly shaped ears so comfort and fit are generally a bit of a problem for me with most earphones.

With these, I encountered a different issue where the seal would be too tight and then I couldn’t hear the music properly. I would have to loosen the seal in order to get optimum sound quality from the S28. This issue has been encountered by other reviewers so I am not alone in facing this problem. Once you do get a decent seal it generally stays put for a decent amount of time. However, with the long housings, comfort is average to below average. One way to alleviate this is to loop the cord over the ear.

Sound Quality with Blackcaps

For the first time, I am going to write TWO separate Sound quality feedback with both the tuning caps since the sonic differences are rather prominent between the two that they sound almost like a different earphone with each one.

The Kworld S28 comes with the Blackcaps on by default. To change the caps you just need to unscrew them and screw in the other caps- a 30-second job. One negative that I should mention is that the black caps have a very short thread and once when removing the earphone the caps just popped off and fell down. The silver caps have deeper threads and so far seem more secure.

With that out of the way let me just say that the overall sound is Brilliant! Just love the sound signature. It is so dynamic for the lack of a better word. The Kworld S28 has a beautiful soundstage that just envelops you completely. You get plenty of well-detailed bass without being too boomy, a well-detailed mid-range and decent treble.

Let us start with the bass. It is not boomy and has good punch and impact. However, its main USP is that the bass has brilliant speed. The Kworld S28 can handle very fast paced music with ease! A very good result for an earphone at any price range much less one that is priced so low.

The S28 has a good mid-range but it does not stand out. The midrange is neither warm nor cold and I would best describe it as neutral. The S28 has a very detailed midrange with clear vocals. The vocals are pretty smooth too with no harshness or objectionable peaks in the frequency.

The treble is good but a bit muted in respect to the bass and mids. There is still a lot of detail but the sparkle and crispness are lacking a bit. The treble is rolled off and doesn’t have any nasty spikes or harshness.

Which brings us to the soundstage. Well, it’s one of the best I have heard from an IEM at any price point. The S28 can portray a really wide soundstage that is rare considering IEMs are inserted in your ears. Walking with these earphones on the road is an awesome experience with a wide soundstage that has great depth and decent height which envelopes you almost 3d like.

So to sum up with the black caps the Kworld S28 is a very dynamic sounding earphone with good bass, good mids, decent treble and GREAT soundstage.

Sound quality with Silver caps

I have heard tuning earphones before,  with the Coolermaster Resonar. The CM Resonar offered a very minute sonic difference with the tuning cap and honestly, I struggled to hear the difference between the two sound signatures. I didn’t have much trouble telling the two tuning caps apart on the S28 though! When you put on the silver caps you immediately can tell that the bass becomes a lot tighter. You lose that some of mid-bass and thump and instead the bass becomes rather flat. To be honest I like a bit of mid-bass in my earphones and the silver caps reduce the mid-bass greatly.

The mids remain similar which is to say that it is still good even with the reduced bass. You do gain a slightly better treble response, however. The treble seems a bit crisper and with the reduced bass, some of the detail that was drowned out by the mid-bass become more prominent. But the improvements aren’t as stark as the reduction in bass. That lovely wide soundstage that you get with the black caps is reduced greatly and it becomes more intimate. The Kworld S28 can still portray a very nice imaging or instrument separation but that lovely perceived width is no longer there.

So to sum up I am not entirely convinced that the silver caps are very good but your mileage may vary.

At the end of the day…

The Kworld S28 is a breath of fresh air in an overcrowded market. I am not terribly happy with the silver caps though I am very happy with the black caps. The fact is you do get a sonically distinct option which is very very useful.

India US UK
NA  $13.99 £26.09


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  • Amazing soundstage
  • Very good sound quality
  • Tunable sound with distinct sonic changes with each cap
  • Inline remote with mic and volume control
  • Good build quality


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  • Slightly rolled off treble with the black caps


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