64 Audio U18t (2025 Revision) Universal In-Ear Monitor

U18t 2025 Revision

New Look. Same Legendary Sound.

• Raised Metal Logos
  
• New Shell Color & Texture
  
• Chamfered Faceplate Bezel
  
• U18t PVD Coated Stainless Steel Faceplate/m20 Modules
  
• U18t Imperial Red electroformed nickel + enamel like texture faceplate chip
• Now comes with all current apex modules and two cables terminated in 3.5mm & 4.4mm. U18t comes with a brand new 8-Braid SPC cable very similar to the feel/finish of Solo’s Pure Copper Cable
• Along with the cosmetic changes, U18t is now packaged in a newly designed unboxing experience seen launched with Solo

Packed with an unbelievable 18 balanced armature drivers per side, U18t is our top-of-the-line reference in-ear monitor. This industry-first design sits right at the boundary of what is physically possible in a UIEM. Released and developed alongside Fourté in 2016 it is the first IEM to integrate our patented tia technology with conventional IEM design, utilizing the tia high driver and single sound bore. This astonishingly complex system results in incredible detail, extension, and unmatched clarity across all frequencies.

U18t achieves its quick bass response, while retaining enough sub-bass amplitude, by coupling eight modified mid-drivers for the low frequency band rather than using fewer/larger drivers. Another eight low-mid drivers are required to match that amplitude in the mids. The one high-mid + one tia high driver combination became the basis for 90% of our entire product range. The extremely accurate response of U18t makes it perfect for critical audiophile listeners as well as mixing and mastering engineers. Aluminum billet shells precisely milled into our signature ergonomic shape. The PVD Stainless Steel faceplates are finished with an Imperial Red enamel like chip inlay.

U18t is paired with two exclusive SPC Eight-Braid Cable, one 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. U18t 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 four module variations for U18t: mX, m12, m15 and an exclusive PVD coated stainless steel m20 module.

Specifications

Color
Imperial Red
Polished Gold

Material
PVD Coated Stainless Steel Faceplate
Electroformed Nickel Faceplate Chip

Driver Configuration
1 tia High Driver
1 High-Mid Driver
8 Mid Drivers
8 Low Drivers

Frequency Response
10 Hz - 20 kHz

0.78mm 2-Pin Cables
3.5mm + 4.4mm
0.26Ω - Eight-Braid SPC
25 AWG + 23 Wires

Sensitivity
111 dB/mW @ 1 kHz

Impedance
9 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

• U18t 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 Black Eight-Braid Cable
• 4.4 mm Black Eight-Braid Cable
• Shirt Clip
• Cleaning Tool
• Cleaning Cloth
• Round Sticker
• Apex Modules (m20, m15, m12, mX)