Fearless Audio S6RUI

Best under $400!

PROS: Value for money, smooth well balanced sound, exceptional BA bass quality, fit and finish, great looking faceplates and shell customization options, beautiful looking cable.

CONS: Cable could use a better jack.


Fearless S6Rui was sent to me 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.

My background.

I am a professional musician, producer and audio engineer with experience in the performing, recording and pro-audio industry. I test products on a technical and musical level and try to write reviews as simple as possible from a music fan’s perspective.

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.

Technical Specifications

  • Driver – 6 Balanced Armature
  • 1 Sonion dual BA for bass, 1 Sonion dual BA for mids ,2 Knowles BAs for highs.
  • Frequency response range: 20Hz-20kHz
  • Impedance: 20 ohm
  • Sensitivity: 113dB/MW
  • Isolation: 26dB
  • Cable – 2pin 0.78mm 8 core cable
  • Plug:3.5mm

Available for sale on Amazon.

About Fearless. 

Fearless Audio (Wuwei in Chinese) is a brand based out of China. They specialize in making universal and custom fit in-ear monitors and have a vast range of products ranging from a single BA driver to 12 BA drivers. They offer multiple customization options for shells and faceplates where sky’s the limit. You can either select from their stock charts or send them images of shells, faceplates and logos that you like and they can make it happen.

Included in the box.

  • Fearless S6RUI
  • Eartips – 4 Foam, 3 (SML) SpinFits and 3(SML) Black silicone.
  • Plastic Carrying Case
  • 2-pin 8 Core cable
  • Shirt clip
  • Cleaning tool
  • Metal plaque with information pertaining to the model

fearless_s6rui-S6RUI 2 eartips

Build Quality.

S6RUI has good build quality. The shells are 3-D printed and made up of resin. They are crystal clear and you can clearly see the drivers inside which either spot the company’s name ‘Fearless’ or the model number, ‘S6RUI’. The shells do not have any bubbles and the seam between the faceplate and bottom shell is flawless too. The 2-pin sockets are recessed which enables part of plastic before the 2-pins of the cable to go in. The sound bores in the nozzles have been drilled very neatly too.

The 2-pin 8 core cable provided in the package has an attractive silvery white color and feels very well made. It’s not the most flexible cable but it has a very good feel to it and has absolutely no microphonics. There is an odd problem though, it crackles if you twist the jack while it is plugged in. It might be due to the lack of gold plating on the jack and a slight build-up of an oxidation layer, but it doesn’t matter if you’re not a nitpicker like me as it does not alter the sound performance even a bit. Trust me, I’ve compared it with the other cables I have. Impedance of the cable is around 250mΩ.

fearless_s6rui-S6RUI 4 Solo

Fit and Comfort.

S6RUI has an extremely comfortable fit for me, probably one of the best I’ve tried under $400. I would’ve enjoyed if the nozzles were just a smidgen longer but regardless of that, I get a very snug fit with good isolation. All the curves of the shells are polished well and feel nice around the concha of the ear.

fearless_s6rui-S6RUI 3 nozzles

Page 2 – Sound analysis, Comparison, and Conclusion.

2 thoughts on “Fearless Audio S6RUI

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s