The 64 AUDIO U5 Universal Fit Earphones are designed with a highly accurate "reference" sound signature. The A5 is considered to be the “little brother” to the highly acclaimed U10 earphones and shares the same Quad High Frequency Driver set up. They're comprised of 5 masterfully tuned drivers per ear, which bring out detail and clarity in any genre of music. The U5 also features the innovative apex™ technology. Apex (air pressure exchange) is an enhanced version from the previous technology that relieves air pressure caused by miniature speakers in a sealed ear canal. Apex gives you a superior listening experience that simply cannot be achieved by traditional IEM’s. The U5 is tuned for neutral bass, incredibly accurate mids and a silky-smooth top end. The U5’s deliver a deep soundstage that will allow you to hear “hidden" parts of a recording that previously went unnoticed. Get ready to explore your music library all over again with the amazing precision and accuracy of the U5! This product is ideal for professional studio, acoustic performers, vocalists, and the most discerning audiophiles.

Like all 64 AUDIO universal-fit products, the U5 earphones are inherently noise canceling and are designed to work well with a wide range of personal audio devices as well as all Personal Monitoring Systems.

This product has been discontinued or is not currently available for sale.

Included Accessories

  • 64 Audio Personalized Protective Case
  • 48” Detachable Black Cable
  • Cleaning Tool
  • Shirt Clip
  • Dehumidifier
  • Round Sticker
  • apex Module


Proprietary Technologies



By removing pneumatic pressure from the ear canal, sound is felt to be more spacious and outside the head when compared to traditional earphones.
A superior balanced armature driver design that pushes the diaphragms in the center. This yields a deeper, more dynamic bass response.
The capability of the earphones to reduce ambient or stage noise when properly inserted.
The range of frequencies that the earphone is able to produce under typical use.
ApexTM restores proper phase response at the eardrum by switching from pressure-based amplitude to velocity- based amplitude.
The configuration and arrangement of drivers per frequency band.
A passive crossover network that directs frequencies to drivers that are optimized for their reproduction.
Sound bores are used to channel the sound from a driver or a group of drivers to the eardrum. Multi-bore designs allow unique frequency shaping capabilities.
The load or resistance that the earphone will present to an amplifier. Lower resistance is much easier to drive than high resistance.
A revolutionary technology that eliminates pneumatic pressure that causes excessive eardrum movement.
The Sound Pressure Level (SPL) produced per 1mW of input power. The higher the sensitivity the less power is required to drive the earphones.

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Quick-Start IEM Guide

Whatever budget or tone you're looking to fit, 64 Audio IEMs will deliver pristine results. However, each person's individual preferences are as diverse as the musician themselves; and since no one knows what you want better than you, we'd like to point you in the right direction to get there faster.

Here is a quick guide with some of our recommendations for common musical categories and applications. From this point, you may tailor your IEM choice to your taste.


  • Singer - U12t, U18t

  • Guitar - U12t, U18t

  • Drummer - U12t, U18t

  • Bass - U12t, U18t

  • Keyboard - U12t, U18t

  • Engineer - U12t, U18t, Trio, Fourté

  • DJ - U12t

  • Audiophile - U12t, U18t, Trio, Fourté