64 Audio at Audio46
New at Audio4664 Audio U12t (2025 Revision) Universal In-Ear Monitor
WIRED in-ear HEADPHONE
2-pin connection
studio/professional
✓ In stock and ready to ship immediately
✓ FREE
✓ Ships Monday Monday with with
✓ 1 year limited 64 Audio warranty
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Product Details
Audio46's Opinion
It's not a stretch to say that 64 Audio's U12t is one of the most universally loved and respected IEMs in the $2000 price tier. With its balanced yet articulately warm tuning and the classic 64 Audio wrap-around-you-head imaging, what's not to love? As its name suggests, the U12t utilizes 12 balanced armature drivers, which feed into 64 Audio's proprietary Tia tubeless design. Traditional acoustic tubing is forgone in favor of specialized acoustic chambers, which deliver sound from the drivers to a listener's ear completely free of tubular resonance. With its exceptionally natural midrange, smooth yet highly resolving treble profile, and articulate low end that can find ample customization with the included APEX modules, the U12t will likely hold the $2000 throne in the IEM space for the foreseeable future.
↓ Details provided by 64 Audio ↓
(Specifications and appearance of this product are subject to change without notice)
U12t 2025 Revision
New Look. Same Legendary Sound.
- Raised Metal Logos
- New Shell Color & Texture
- Chamfered Faceplate Bezel
- U12t silver color electroformed stainless steel faceplate chip
- Now comes with all current apex modules and two cables terminated in 3.5mm & 4.4mm. U12t is the first UIEM that will come standard with our Pearl Premium Cable
- Along with the cosmetic changes, U12t is now packaged in a newly designed unboxing experience seen launched with Solo

U12t does it all, delivering immersive sound and impeccable spatial imaging. Its articulate highs extend beautifully with a warm and engaging low-end response - just like its custom counterpart, the A12t.
Offering reference-level detail, this IEM has become one of the most highly regarded and sought after audiophile UIEMs. Each ergonomic shell is machined out of a solid piece of aluminum and finished with an elegant brushed aluminum faceplate.
U12t is the first UIEM that will come standard with our Pearl Premium Cable including both 3.5mm single-ended and one balanced 4.4mm.

Patented Technology
tia
Tubeless In-Ear Audio (tia) is a patented IEM design methodology that aims to reduce unwanted resonance and distortion for a transparent and lifelike sound signature. The tia system is comprised of three major elements: open balanced armature tia drivers, the tia single-bore design, and tia acoustic chambers. U12t features two major elements of the tia system: the tia driver and the tia single-bore design.
Apex
Air Pressure Exchange (Apex) is a patented vent that releases air pressure in a sealed ear canal all while retaining standard IEM levels of isolation; enabling musicians and music enthusiasts to listen more comfortably for longer. This venting alleviates listener fatigue and allows for a much more realistic soundstage. Apex comes in three module variations for U12t: mX, m15 and m20.
LID
Linear Impedance Design (LID) is a patented circuit that corrects the non-linear electrical resistance of the multiple driver-sets comprising this 12 driver IEM. Varying source amplifier output impedance in devices like smartphones, body packs, DAC/amps, and DAPs typically results in varying frequency response across them, depending on the increase in resistance. Restoring proper interaction with the source and preserving the desired sound signature enables a consistent reliable sound.
Specifications
Color
Silver
Material
T6061 Aluminum Shell
Electroformed Stainless Steel Faceplate Chip
Driver Configuration
1 tia High Driver
1 High-Mid Driver
6 Mid Drivers
4 Low Drivers
Frequency Response
10 Hz - 20 kHz
0.78mm 2-Pin Cables
Silver Plated OCC Copper
7 x 7 x 4 Multi-Twist
0.23Ω - 26 AWG - SPC
Sensitivity
108 dB/mW @ 1 kHz
Impedance
12.6 Ω
Apex Isolation
-10db to -20db
Designed, Assembled, and QC’d by highly skilled technicians in the United States using components sourced both domestically and globally from trusted suppliers.
Included
- U12t Universal In-Ear Monitors
- Carry Case
- TrueFidelity Foam Ear Tips (S,M,L)
- SpinFit Silicone Ear Tips (S,M,L)
- Silicone Ear Tips (S,M,L)
- 3.5 mm Silver Premium Cable
- 4.4 mm Silver Cable
- Shirt Clip
- Cleaning Tool
- Cleaning Cloth
- Round Sticker
- Apex Modules (m20, m15, m12, mX)