• 100% Genuine with official warranty
  • 360° rotating eartip adjusts to the unique angle of your ear canal for personalized fit and better sound isolation
  • C-tip design fits the shape of your ear for reliable， stay-in-place comfort
  • In-line control with mic for answering/ending calls， controlling music & video playback， and controlling volume (on compatible smartphones & other portable devices)
  • Crisp， accurate audio reproduction
  • Includes carrying pouch， eartips (XS/S/M/L)， C-tips (S/M/L)


Music is your energy for life – the fuel for your heart and soul. SonicFuel® headphones are specifically designed for active， daily use， to power you forward by delivering extraordinary comfort， style and an immersive listening experience that never sounds artificial， processed or filtered. Just pure sonic goodness for the high-octane tempo of your life. 

The ATH-CKX5iS SonicFuel® in-ear headphones feature stay-in-place fit， providing unique comfort in addition to optimal sound. The C-tip configuration nestles within the ear where it locks in place for extra stability. A 360˚ rotating eartip adjusts to the unique angle of your ear canal for personalized fit and improved sound isolation. 

In-line volume and microphone controls (on compatible smartphones) allow you to control music & phone calls without missing a beat. 
















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Type Dynamic
Driver Diameter 8 mm
Frequency Response 15 - 22，000 Hz
Maximum Input Power 40 mW
Sensitivity 100 dB/mW
Impedance 16 ohms
Weight 10 g (without cord)
Cable 1.2 m， Y-type
Connector 3.5 mm gold-plated stereo 4-pin mini-plug， L-type
Accessories Included Carrying pouch， eartips (XS/S/M/L)， C-tips (S/M/L)
Type (Microphone) Condenser
Sensitivity (Microphone) -44 dB (0 dB=1 V/Pa， 1 kHz)
Frequency Response (Microphone) 100 - 10，000 Hz
Polar Pattern (Microphone) Omnidirectional




About the Company
Audio-Technica was founded in 1962， and it is now a worldwide group of companies focused on designing， producing， marketing and distributing audio equipment. They’ve won numerous industry awards and have set the standards for quality， durability， performance， and price for professional and non-professional users. Audio-Technica now creates high-performance microphones， headphones， wireless systems， mixers and electronic products.