64Audio U4s vs THIEAUDIO Monarch MKIII
Introduction
The 64Audio U4s and THIEAUDIO Monarch MKIII are high-end IEMs that deliver top-tier sound for audiophiles, professionals, and casual listeners. Let's examine each model and discuss key features, sound signatures, and price differences so you can choose the right IEMs for your needs.
Not the right fit? Browse other 64Audio In-Ear Monitors or THIEAUDIO IEMs.
64Audio U4s vs THIEAUDIO Monarch MKIII Price Comparison
The 64Audio U4s and THIEAUDIO Monarch MKIII are priced very similarly.
The U4s comes in at $1,099.00.
The Monarch MKIII comes in at $999.00.
The Monarch MKIII is slightly more affordable than the U4s. 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 U4s
The 64Audio U4s is a hybrid universal IEM designed for professionals and audiophiles. It features a hybrid driver setup with one dynamic driver and three balanced armatures, alongside 64Audio technologies like Apex, LID, and tia.
64Audio U4s Features:
- Hybrid driver setup: 1 dynamic + 3 balanced armatures
- 64Audio’s apex® pressure relief system (modular)
- tia™ high-frequency driver for clarity
- LID (Linear Impedance Design) for consistent sound across sources
- Customizable apex modules (mX, m15, m20)
- Excellent noise isolation and comfort
64Audio U4s Specs:
Driver configuration: 1 DD + 3 BA
Frequency response: 10Hz – 20kHz
Impedance: 11Ω @ 1kHz
Sensitivity: 99 dB/mW
Connector: 2-pin
Apex modules included: mX, m15, m20
Shell: Aluminum body
The THIEAUDIO Monarch MKIII
The Monarch MKIII is a flagship IEM from THIEAUDIO. It features a 10-driver hybrid configuration combining dynamic drivers, balanced armatures, and electrostatic drivers. The Monarch MKIII boasts a precise yet exciting tuning for audiophiles and professionals alike.
THIEAUDIO Monarch MKIII Features:
- Tribrid driver setup: 2 dynamic + 6 balanced armatures + 2 electrostatic
- Improved bass response and timbre tuning
- Semi-open acoustic chamber for airiness
- Upgraded cable and modular plug system
- Great soundstage and imaging
- High value-to-performance ratio
THIEAUDIO Monarch MKIII Specs:
Driver Configuration: 2 DD + 6 BA + 2 EST
Frequency Response: 20Hz – 40kHz
Impedance: 19Ω
Sensitivity: 108dB
Connector: 2-pin
Shell: 3D-printed medical-grade resin
Cable: Modular with 2.5mm, 3.5mm, and 4.4mm ends included
Design and Build Quality
The 64Audio U4s and THIEAUDIO Monarch MKIII are two different IEMs when it comes to design and build quality. The U4s features 64Audio's half-moon aluminum shells, while the Monarch MKIII uses medical-grade resin shells.
The 64Audio U4s features the familiar 64Audio universal shell design. The half-moon shell shape offers good comfort and fit, while the aluminum construction provides a solid and dependable build. The U4s comes with swappable Apex Modules and offers a sleek and understated design that suits casual and professional use.
The Monarch MKIII features an ergonomic shell shape for good on-ear comfort and fit. Its shells are made of durable medical-grade resin material, while its faceplates are handcrafted and offer a unique artistic 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.
U4s Sound Signature
The 64Audio U4s is tuned to deliver a bassy, musical tuning.
Bass is tight and controlled, offering good extension into the sub-bass. The midrange is accurate with a slightly thicker presentation. This gives male vocals more weight and bass hits more impact. The highs on the U4s is smooth and non-fatiguing. It delivers enough detail without harshness.
Soundstage on the U4s is slightly narrow, offering a more intimate presentation rather than an immersive, 3D-like experience. Sounds are easy to pinpoint, making the U4s great for both music and gaming.
Monarch MKIII Sound Signature
The Monarch MKIII is tuned to deliver top-tier resolution, clarity, and precision.
Bass is strong, offering exceptional extension into the sub-bass frequencies for textured rumbles and impactful slams. The midrange is clear, detailed, and accurate. Vocals sound like-like and crystal-clear. The highs are well-extended on the Monarch MKIII, offering an open and spacious feel with excellent detail.
Soundstage on the Monarch MKIII is wide and spacious. Instruments are well-spaced and are easy to pinpoint within the soundscape.
Price and Value
The $1,099 U4s features a quad-driver hybrid configuration with a large dynamic driver and three balanced armatures. Apex technology lets you tune sound and noise isolation to your liking, allowing you to experience the U4s in different ways. Build quality is solid and premium - those aluminum shells are guaranteed to last for many years and offer a lightweight and comfortable fit.
The $999 Monarch MKIII packs a 10-driver tribrid configuration with dual dynamic drivers, six balanced armatures, and two electrostatic drivers per earbud. Its shells are made of 3D-printed medical-grade resin and feature unique faceplates with customizable designs. The Monarch MKIII comes with a premium modular cable with three swappable terminations.
Our Thoughts
The 64Audio U4s and THIEAUDIO Monarch MKIII feature excellent sound and build quality. Both of these IEMs is a solid choice if you're looking for a high-end listening experience.
Get the 64Audio U4s if you prefer a fun, warm, and smooth sound experience for those long listening sessions. Its musical tuning is excellent for listening to a wide variety of mainstream genres. Its small and comfortable shells are easy to wear and offer very good comfort for extended listening. Apex technology lets you tune sound and noise isolation for hours of pressure-free listening.
The THIEAUDIO Monarch MKIII is the IEM you want if you're looking for a high-resolution sound, detailed experience at home or in the studio. Its powerful bass adds impact to any music, while its precise mids deliver vocal and instrumental performances that will surely wow. Its medical-grade shells offer good durability and you can even customize its faceplates to make the Monarch MKIII truly your own.
Another IEM to consider in this price range is the Empire Ears ESR MKII. The ESR MKII is a five-driver hybrid IEM with neutral, reference-level tuning, excellent detail, and a realistic soundstage. A good choice for critical listening and studio monitoring.
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