64Audio U12t vs THIEAUDIO Monarch MKIII
Introduction
The 64Audio U12t and THIEAUDIO Monarch MKIII are high-end in-ear monitors designed to deliver audiophile-grade sound experience. Let's examine both models and discuss design, sound, features, and price so you can choose the right IEM for your listening needs.
Not the right fit? Browse other 64Audio and THIEAUDIO In-Ear Monitors.
64Audio U12t vs THIEAUDIO Monarch MKIII Price Comparison
The U12t and Monarch MKIII sit at two completely different price brackets.
The U12t comes in at $1,999.00.
The Monarch MKIII comes in at $999.00.
In this comparison, the U12t costs twice the Monarch MKIII. Let's dive into the specs, design, sound signatures, and features of both in-ear monitors so you can get a better idea of what each one brings to the table.
The 64Audio U12t
The U12t is a high-end universal in-ear monitor from 64Audio. It sports 12 balanced armature drivers per side - including 64Audio's patented tia high driver. The U12t features 64Audio technologies like Apex, Tia, and Linear Impedance Design for precise sound reproduction.
64Audio U12t Features:
- Twelve precision balanced armature drivers
- tia™ (Tubeless In-ear Audio) technology for open, natural sound
- apex™ modules (m12, m15, m20, mX) to reduce ear fatigue
- LID™ (Linear Impedance Design) for consistent sound across sources
- Ergonomic textured aluminum shell with raised metal logos and chamfered faceplate bezels.
64Audio U12t Specs:
Driver Configuration: 1 tia High Driver – 1 High-Mid Driver – 6 Mid Driver – 4 Low Driver
Frequency Response: 10hz – 20kHz
Sensitivity: 108 dB/mW @1kHz
Crossover: Integrated 4-way Passive Crossover
Impedance: 12.6 +1/-2 Ω from 10hz – 20kHz
Apex Technology Isolation: -20dB, -15dB, -12dB, -10dB
The THIEAUDIO Monarch MKIII
The THIEAUDIO Monarch MKIII is a tribrid studio monitor that combines dynamic, balanced armature, and electrostatic drivers to deliver top-tier resolution, balance, and detail. It features THIEAUDIO's IMPACT2 technology for powerful and accurate bass reproduction.
THIEAUDIO Monarch MKIII Features:
- 10-driver tribrid setup: 2 dynamic, 6 balanced armature, 2 electrostatic
- IMPACT² isobaric subwoofer design for enhanced bass
- Medical-grade resin shell with customizable faceplates
- Upgraded modular cable with interchangeable plugs
- Balanced tonal signature with studio-monitor-like accuracy
THIEAUDIO Monarch MKIII Specs:
Driver Configuration: 2DD (10mm composite), 6 BA, 2 EST
Impedance: 20Ω
Sensitivity: 99 dB @ 1kHz
Frequency Response: 20Hz – 40kHz
Cable: 1.2m 22AWG 6N OCC silver-plated and graphene silver-plated
Connectors: 2-pin 0.78mm
Terminations: Modular with 2.5mm, 3.5mm, and 4.4mm plugs
Design and Build Quality
The U12t and Monarch MKIII are completely different in-ear monitors in design and build. Both IEMs offer a lightweight and robust build quality with a unique eye-catching aesthetic.
64Audio updated the U12t for 2025 with a fresh new aesthetic. A Textured Silver Shell Color, Raised Metal Logos, and Chamfered Faceplate Bezel deliver a more elegant look and feel. At the front, you'll find the Apex ports under the chamfered 64Audio logo. Overall build quality is top-notch - the U12t feels solid in the hand and the new textured shells offer a more premium feel.
The THIEAUDIO Monarch MKIII uses a handcrafted medical-grade resin shell for a robust and lightweight feel. The Monarch MKIII's shells are bigger than the U12t but offer an ergonomic and natural fit. Its faceplates feature a unique galaxy-inspired aesthetic with the option to customize the faceplates for a unique look.
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.
U12t Sound Signature
The U12t features a neutral, reference-level tuning known for its accurate, detailed, and immersive sound presentation. It is the perfect in-ear monitor if you're looking to scrutinize every note and detail in your favorite music.
The bass in the U12t is well-balanced, delivering good impact and rumble when needed. Its midrange is natural and clear, allowing voices to come through with life-like clarity. Its soundstage is one of the largest you'll hear in an IEM, offering accurate sound placement for an immersive sound.
Monarch MKIII Sound Signature
The Monarch MKIII features an accurate, detailed, and balanced sound signature with impactful bass. The bass is the highlight here, offering a deep and textured sub-bass rumble with tight and controlled punch, courtesy of IMPACT2 isobaric subwoofer design. The midrange is clear, clean, and accurate with a slightly warm presentation; vocals sit closer in the mix for a more intimate listening experience. The treble is well-extended on the Monarch MKIII, offering a clear and lively sound without harshness.
The Monarch MKIII's soundstage is spacious and accurate. Instruments and vocals are easy to pinpoint and are well-defined.
Price and Value
The U12t and Monarch MKIII sit at very different price points. Both models offers exceptional sound, build, and aesthetics.
The $1,999 U12t comes with a fresh new look and a generous set of accessories in the package. In the box, you get all the current Apex Modules and a pair of Pearl Premium Cables in 3.5mm & 4.4mm. You also get a selection of ear tips, a leather case, a cleaning tool, clips, and stickers in the package.
The $999 Monarch MKIII comes in at half the price of the U12t. At that price, you're getting premium medical-grade resin shells with a customizable faceplate design, a 10-driver tribid configuration with dual dynamic drivers, balanced armatures, and electrostatic drivers, and a premium cable with swappable terminations, alongside a generous selection of ear tips and accessories.
Our Thoughts
The 64Audio U12t and THIEAUDIO Monarch MKIII are high-end IEMs with exceptional sound quality. Both IEMs are a solid choice if you're looking for a top-of-the-line listening experience.
The 64Audio U12t delivers reference-level resolution, detail, tone, and soundstage immersion. It is the IEM to get if you want to experience your music with top-tier clarity and detail. Music on the U12t sounds clean, clear, and accurate. The 2025 version is even better - boasting an updated design and accessories package without the extra cost. You can swap out Apex Modules to fine-tune sound to your liking.
At half the price, the THIEAUDIO Monarch MKIII delivers top-tier sound performance that rivals the U12t. The IMPACT2 dual dynamic drivers deliver bass like no other, while the balanced armatures and electrostatic drivers offer exceptional resolution and detail with incredible accuracy. The premium resin shells are bigger than the U12t's ergonomic aluminum shells, but with the right ear tips, you can enjoy the great sound for hours without discomfort.
Another IEM to consider in this price range is the 64Audio Solo IEM. The Solo features a sleek aluminum alloy design for a lightweight and robust feel, while its large 14.2mm planar magnetic drivers deliver exceptional vocal clarity and tone.
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