64 Audio Fourté™ Hybrid Universal-Fit In-ear Monitors

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The pinnacle of in-ear monitor technology, Fourté takes full advantage of everything we've learned up to this point in designing world-class in-ear monitors. Fourté boasts the most accurate sound and widest soundstage of any in-ear monitor, making it the perfect choice for audiophiles seeking detailed, lifelike audio, and three-dimensional sound.

Fourté features our complete, three-part tia™ system housed in an ergonomic shell, machined from a solid piece of aluminum and finished with elegant, copper patina faceplates.



Exclusive technologies that challenge traditional in-ear monitor designs to give you the absolute best listening experience

Fourté features the following unique technology:

A tubeless design that reduces resonance for a transparent and lifelike sound signature.

Only from 64 Audio, apex alleviates listener fatigue by releasing air pressure sealed in the ear canal. This venting enables musicians and music enthusiasts to listen more comfortably for longer.



Driver Type/Count

3 precision BA drivers, 1 dynamic driver

Driver Configuration

1 tia high, 1 high-mid, 1 tia mid, 1 dynamic low

Frequency Response

5Hz – 22KHz


114db @1kHZ @1mw


10 Ω @ 1kHz


Integrated 4-way passive crossover


-20dB internal apex technology


  • Fourté Universal In-Ear Monitors
  • 64 Audio Sticker
  • 64 Audio Premium Leather Case
  • TrueFidelity Eartips (S,M,L)
  • Silicone Eartips (S,M,L)
  • 48" Detachable Premium Cable