Hidizs Mermaid MS4

A Beautiful Hybrid with A Twist!

PROS: Build Quality of the whole package, interesting fun sound signature, good selection of accessories, beautiful and ergonomic leather case, rich ownership experience.

CONS: Even though it fits me perfectly, shells might feel big for small ears, bass is good but a bit more speed and refinement could’ve made it perfect, slightly lacking lower mids clarity.


I would like to thank Hidizs for sending me the MS4 to test and review. I am not affiliated with the company or any of its sellers and write this review with an unbiased opinion regardless of how the review turns out.

Genre preferences.

I majorly listen to rock, acoustic, pop and metal and occasionally listen to EDM songs which are doing the rounds on the radio and charts.

Manufacturer website: Hidizs.  Available for sale on Amazon.

Technical Specifications and In the Box


Unboxing Experience.

I generally don’t put too much stress on this aspect of the experience, but I think Hidizs deserves a pat on their back for this. The box looks classy, very classic in its design. As soon as you open it, the IEMs welcome you, beautifully placed on top. As you dig in into the second layer, you are welcomed by another attractive sight with the eartips placed systematically in their own slots on the top and a beautiful leather case at the bottom. The carry case again needs special mention as it is one of the best looking and quality leather cases I have received with an IEM, unheard of in this price range.


Build Quality.

In short, the build quality of the whole package and everything included in the package is excellent. I can’t point out a single thing that is bad here.

MS4 – The shells are made up of high density grade CNC Aluminum alloy, with every curve smoothly finished. The shells are matte finish whereas the faceplates have a glass top which adds on to give the overall shell a classier look. The faceplates have a golden frame outline and spot the name Hidizs and the company logo in silver. The seam between the gold outline of the faceplate and the bottom shell is finished very well too.

Cable – The cable matches the shell’s design language very well. It is metallic dark brown in color and is covered in a plastic sheath. The 3.5mm jack and the 2-pin connectors look good too and I personally have no complaints.


Leather Case – One word, WOW! You can see the case below with your own eyes and gauge its beauty and quality. It’s extremely well made by using good raw materials and stitching. It has a magnetic closing mechanism which is strong and keeps the IEM in place. It also has a small net inside to keep your extra tips or cleaning brush.


Fit and Comfort. 

With the wide-bore ear tips it comes stock with, it fits me snugly. Though the shells are a bit big and can be troublesome for people with small ears. As for comfort, they aren’t as heavy as they look and remain comfortable for long periods, taken they fit you well.

Page 2 – Sound analysis, Comparison, and Conclusion.

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