64 Audio U18t 18 Driver Reference In-Ear Monitor

Key Features:
  • 18 driver flagship reference monitor
  • Highly resolving, natural sound
  • Apex pressure relief system
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The U18t is 64 Audio’s flagship reference tuned offering, offering 8 drivers focusing on the bass frequencies, 8 drivers focusing on the midrange and a duet of Tia drivers focusing on the highs and mids. The 18 drivers are secured in an ergonomic aluminium shell, and the inlaid copper patina faceplate finishes off the design with flair. The U18 also features Apex technology, which relieves air pressure created by speakers in an enclosed environment. The U18 comes bundled with a 48 inch, 2-pin detachable cable terminating with a 3.5mm plug, protective case, a extensive set of silicone tips, the Apex m20 module and the Apex M15 module, shirt clip, and cleaning tool.

The U18 Tzar’s delivers an accurate, reference level sound for critical listening. The earphones are airy, detailed, and exhibit crisp highs, yet have powerful bass and smooth, intimate vocal presence. The balance of these elements ensure the U18 is suited for any genre of music, faithfully representing the music as the artist intended. The U18t is preferred by critical listeners in engineering, monitoring and mixing, and audiophiles.


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What's in the box

  • U18t Universal In-Ear Monitors
  • 64 Audio Premium Leather Case
  • TrueFidelity Foam Ear Tips (S,M,L)
  • SpinFit Silicone Ear Tips (S,M,L)
  • Silicone Ear Tips (S,M,L)
  • 3.5mm Black Premium Cable
  • Apex Modules: m20, m15, mX
  • Cleaning Tool
  • Cable Clip
  • Round Sticker


Drivers 1 tia High Driver - 1 High-Mid Driver - 8 Mid Drivers - 8 Low Drivers
Frequency Response 10 Hz – 20 kHz
Sensitivity @1 kHz 111 dB/mW
Impedance @1 kHz 9 Ω
Crossover Integrated 4-way Passive
Apex Technology Isolation -20 dB, -15 dB, -10 dB

Audio Performance

Drivers18 Drivers
Sound Signature
Rich, ultra-detailed and balanced for critical listening


Low Mid

Mid High


Resolution (10)

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With nearly two decades experience as a sound engineer, Vitaliy Belonozhko founded 64 Audio when he discovered the advantages of IEMs over traditional floor wedges. With unique technologies such as the Tia tubeless driver design and the Apex pressure relief system, 64 Audio consistently aims for high performance, balanced sound with practical, ergonomic fit.

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64 Audio