64 Audio tia Fourté In-Ear Monitor Headphones

The tia Fourte from 64 Audio represents in-ear headphone greatness and is easily one of the best universal IEMs. The Tia Fourte, in our opinion, is the Focal Utopia of in-ear monitor headphones. It just does everything right. There are no glaring flaws and its presentation is absolutely beautiful.

The tia Fourte is a best-in-class IEM and with good reason. There is a ton of technology that 64 Audio has put into the tia Fourte and it definitely impresses.

tia System

A tubeless system which include: tia™ drivers, tia single-bore, tia acoustic chambers, and a passive radiator system. The absence of sound restricting tubes yields an incredibly smooth and musical frequency response and enables a larger depth and soundstage than the conventional system.


A revolutionary technology that eliminates pneumatic pressure that causes excessive eardrum movement. Apex (air pressure exchange) relieves air pressure caused by miniature speakers in a sealed ear canal, giving you a superior listening experience that simply cannot be achieved by traditional IEMs.

tia Single Bore

The single-bore design is a huge leap in eliminating unwanted tube resonance. The large bore itself serves as a sound-shaping chamber and aids the tia high driver in delivering a linear and coherent frequency response.

True Phase

ApexTM restores proper phase response at the eardrum by switching from pressure-based amplitude to velocity- based amplitude.

3D Sound

By removing pneumatic pressure from the ear canal, sound is felt to be more spacious and outside the head when compared to traditional earphones.

Aluminum Body

The body of the earphones are machined out of a solid piece of aluminum for ultimate durability and feature a beautiful matte finish.

  • Product Highlights:

    • Tia Acoustic Chambers
    • Tia High and Mid Drivers
    • Tia Single Bore
    • Internal apex Technology
    • LID Technology
    • Anodized Aluminum Shells
    • 48" Detachable Cable
    • Universal-Fit
    • Warranty: 1-year Parts and Labor
  • Specs:

    • Transducer Type: 3 precision BA drivers, 1 dynamic driver
    • Transducer Configuration: 1 tia high, 1 high-mid, 1 tia mid, 1 dynamic low
    • Freq. Response: 5Hz – 22KHz
    • Sensitivity: 114db @1kHZ @1mw
    • Impedance: 10 Ω @ 1kHz
    • Crossover: Integrated 4-way passive crossover
    • Isolation: -20dB internal apex technology

    What's In The Box:

    • 64 Audio Personalized Protective Case
    • Dehumidifier
    • Cleaning Tool
    • Shirt Clip
    • TrueFidelity Eartips (S,M,L)
    • Silicone Eartips (S,M,L)
    • 48" Detachable Premium Cable
    • Round Sticker
    • Product Manual