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Fearless Audio S4

Fearless Audio S4 - S4

Fearless Audio S4 4BA 2Pin 0.78mm HiFi Audiophile In-ear Earphone IEMs

Transparent seriesK1- K12 (K9,K11 is ready to ship .)

Custom Faceplate :

Type A: A1-B7 is USD25

Type B: F6-F7 is USD30

Type C: C1-E5 is USD35

Type D: F1-F5,E6-E7 is USD50

Custom Fit : USD60 (Accept physical ear impressions or digital ear impressions files)

Custom orders will be shipped out within 1-2 weeks.


Technical features:adapt 4 drivers 3-way crossover 2 tubes

Sound Feature: S4 is very gratifying in the performance of popular songs. Whether it is low frequency, vocal, and resolution, it is quite satisfactory. The transparent sound quality makes the user have a good experience of the favorite music.


Driver:5 balanced armature driver(A Sonion compound low frequency, an independent Knowles intermediate frequency, an independent Knowles high frequency)



Passive noise reduction26DB

Frequency range:15HZ-20KHZ

Connector:2pin 0.78mm



Fearless S4


  • Will be shipped via DHL/UPS/EMS/FEDEX .

  •  It is required to put your phone number on the parcel, please leave me your contact number when you pay.

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Free Shipping

All listed items will be shipped through Registered Airmail with tracking number if there is no extra shipping option or shipping description at the product page.

Economy shipping: Will be shipped without tracking number.(because of the covid-19 affects, economy airmail parcel is easy to lose, pls place the order by choosing registered airmail, or you purchase one more product , we can send together via registered airmail)

Registered Airmail : Will be shipped via such as Hong Kong post , Singapore Post, you can leave us a message if you have any requirements about the shipping method .

We can ship the parcel to Canada and Europe countries via tax-inclusive shipping method with extra charge, pls leave us a message if needed.

Express service: Will be shipped via DHL/EMS/UPS/FedEx,Canada and Europe countries will be shipped via tax-inclusive shipping method for free.

  • Views: 16355
  • Brand: Fearless Audio
  • Product Code: S4
  • Availability: In Stock
  • $289.00

Available Options

Tags: Fearless Audio S4, 4BA, 4drivers, 2Pin