64 Audio tia Fourté IEM

Unrivaled Detailing & Soundstage

64 Audio’s new tia Fourté IEM is aptly named. From class-leading audio performance to ergonomic comfort, everything is its forte. In 64 Audio’s own words, the “tia Fourté takes full advantage of everything we've learned up to this point in designing world-class in-ear monitors.” Front and center is the brand’s lauded three-part tia system, which consists of three open balanced-armature tia drivers, the tia single-bore design, and tia acoustic chambers in each earphone. These components come together in an integrated four-way passive crossover design to “achieve [a] near perfect balance of detail, clarity, and transparency” in a sound profile that can only be described as “intoxicating,” according to third_eye’s 5-star review on Head-Fi. On the ergonomic shell, pneumatically interactive apex vents optimize isolation and alleviate listener fatigue. Completing the tia Fourté, copper faceplates add both durability and elegance. 

64 Audio tia Fourté IEM
64 Audio tia Fourté IEM


  • 64 Audio
  • Drivers: (1) tia high-frequency balanced armature, (1) tia high-mid-frequency balanced armature, (1) tia mid-frequency balanced armature, (1) low-frequency dynamic driver
  • Frequency response: 5 Hz – 22 kHz
  • Sensitivity: 114 dB (1 kHZ, 1 mW)
  • Impedance: 10 ohms (1 kHz)
  • Crossover: Integrated 4-way passive crossover
  • Isolation: -20 dB (internal apex technology)


  • Carrying case
  • Dehumidifier
  • Cleaning tool
  • Shirt clip
  • TrueFidelity eartips (S, M, L)
  • Silicone eartips (S, M, L)
  • 4 ft (1.2 m) premium detachable cable
  • Round sticker
  • Owner’s manual


Estimated ship date is Nov 16, 2020 PT.

Payment will be collected at checkout. After this product run ends, orders will be submitted to the vendor up front, making all orders final.

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My first iem
Tia Fourté