64Audio U18t vs U18s
Introduction
The 64Audio U18t and U18s are high-end Universal IEMs from 64Audio. Both in-ear monitors are designed for the die-hard audiophile or creator looking for the ultimate in sound, comfort, and fit. Let's compare both models so you can decide which IEM suits your preferences best.
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U18t vs U18s Price Comparison
The 64Audio U18t and U18s are similarly priced IEMs.
The U18t comes in at $2,999.
The U18s comes in at $2,999.
With both models coming in at basically the same price, you're probably thinking "What makes one better than the other?" Let's dive deep into the specs, design, sound signatures, and features of both so you can get a better idea of what each IEM brings to the table.
The 64Audio U18t
The 64Audio U18t boasts an eye-watering 18 drivers per side. Multiple Balanced Armature drivers and 64Audio's special tia driver give it unmatched clarity, detail, and separation, making music sound spacious and lifelike.
64Audio U18t Features:
- Tubeless In-Ear Audio (tia)
- Air Pressure Exchange (Apex)
- Linear Impedance Design (LID)
64Audio U18t Specs:
Driver Configuration: 1 tia High Driver – 1 High-Mid Driver – 8 Mid Drivers – 8 Low Drivers
Frequency Response: 10hz – 20kHz
Sensitivity: 111 dB/mW Sensitivity @1kHz
Crossover: Integrated 4-way Passive Crossover
Impedance: 9Ω
Apex Technology Isolation: -20dB, -15dB, -10dB (Variable Isolation (m20, m15, m12, mX modules included in the box)
The 64Audio U18s
The highlight of the 64Audio U18s is its whopping 18-driver configuration consisting of multiple BA drivers and 64Audio's tia high-driver. This driver setup gives the U18s incredible control over bass, midrange, and treble frequencies, resulting in a clear, detailed, and immersive listening experience.
64Audio U18s Features:
- Tubeless In-Ear Audio (tia)
- Air Pressure Exchange (Apex)
- Linear Impedance Design (LID)
- Electrical Low-Pass Filter
64Audio U4s Specs:
Driver Configuration: 1 tia High Driver – 1 High-Mid Driver – 8 Mid Drivers – 8 Low Drivers
Frequency Response: 10hz – 20kHz
Sensitivity: 106 dB/mW Sensitivity @1kHz
Crossover: Integrated 4-way Passive Crossover
Impedance: 8Ω Nominal Impedance
Apex Technology Isolation: -20dB, -15dB, -10dB
Design and Build Quality
As with all 64Audio models, these IEMs are built with extreme precision and attention to detail. You won't be disappointed with the build quality, and they're sure to last years of typical use at home, on stage, or in the studio.
The U18t and U18s feature a precision-machined aluminum shell that results in a stunning yet durable and long-lasting IEM. The U18t features an updated Flame Red Textured Shell with Gold Raised Metal Logos and Chamfered Faceplate Bezels. The U18s will turn heads with its black aerospace-grade CNC Aluminum Billet Shells and Spiderweb-inspired faceplate design.
64Audio's Apex modules are included with the U18t and U18s, with adjustment ranges from -10dB to -20dB, allowing you to adjust noise isolation levels and sound profiles to your preferences. These Apex modules vent built-up pressure in your ears so you can enjoy your music comfortably for longer.
Sound Signature
You're probably looking to see how these IEMs stack up on sound. We'll share our thoughts here, although keep in mind this information tends to be anecdotal and subjective.
U18t Sound Signature
The U18t is known for its clear, revealing, and analytical sound with emphasized treble frequencies. Subtle details in music are easy to pick off with the U18t, making it a great IEM if you're looking for a clean and accurate sound.
U18s Sound Signature
Compared to the U18t, the U18s feature a smoother and warmer sound. The U18s' treble is less prominent while its bass is more emphasized in contrast to the U18t. The overall sound is more musical rather than analytical, leading to a fun yet detailed sound that suits a wide range of genres.
Price and Value
Both the 64Audio U18t and U18s are priced identically at $2,999 but come with a slightly different set of features and accessories.
64Audio gave the U18t an aesthetic overhaul for 2025, featuring a new Imperial Red Textured Shell, Gold Raised Metal Logo, Chamfered Faceplate Bezel, and PVD Coated Stainless Steel Faceplates/m20 modules. The 2025 U18t now comes with all current Apex Modules in the box, alongside a pair of brand new 8-braid SPC cables in 3.5mm and 4.4mm terminations. The U18t comes with 64Audio proprietary technologies: Apex, tia, and LID.
The U18s is unchanged in terms of aesthetics and accessories. In the box, you get a leather case, foam/silicone ear tips, a 3.5mm 8-braid Silver Cable, and a set of Apex Modules (m20, m15, and mX). The U18s features an Electrical Low Pass Filter for reduced distortion alongside 64Audio proprietary technologies: Apex, tia, and LID.
Our Thoughts
The U18t and U18s are fairly similar IEMs in 64Audio's Universal IEM offerings. Both IEMs feature 64Audio proprietary technologies such as Apex, tia, and LID, and are priced similarly at $2,999. With that said, there are notable differences between the U18t and U18s in terms of sound signature, features, and accessories.
The U18t is the perfect high-end IEM for you if you prefer a clean and detailed sound. With 18 drivers per side, the U18t boasts exceptional tonal balance between the bass, midrange, and treble frequencies, allowing you to hear music just like the artist intended.
The U18s is the Yang to the U18t's Yin, featuring a smoother, thicker, and more musical presentation. If you like a more fun and bassy sound in your music without sacrificing detail, then the U18s is the in-ear monitor you want.
As mentioned, the U18t has been updated for 2025 and now comes with a new aesthetic alongside a full catalog of Apex Modules and a pair of 8-braid SPC cables in the box. With the U18s, you get three Apex Modules and a single 8-braid Silver Cable in 3.5mm termination. In terms of value, you get more for your money with the U18t vs the U18s with the former's accessories package.
Other models to consider in this price range are the FiR Audio Krypton 5 and Noble Audio Onyx - both great sounding IEMs in their own right. However, we think the 64Audio U18t and U18s offer the best combination of sound, features, and accessories. You also get the ability to customize sound and noise isolation with the included Apex modules.
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