Monarch Mk4Thieaudio

Name: Monarch Mk4
Brand: Thieaudio
Rating: 7.7 (4 reviews)

Tribrid

2DD 6BA 2EST

$$$$$

2 x Dynamic Driver
6 x Balanced Armature
2 x Electrostatic

$$$$$

Score

7.7

Release Dates

Released: June 2025

Introduction

IEM Description

The Monarch MKIV is the latest evolution in Thieaudio’s Signature Series, now featuring a tuning switch that lets users toggle between two distinct sound profiles: STANDARD mode offers a studio-neutral tuning with clean mids and refined treble. RUMBLE mode adds +3dB sub-bass for a warmer, more powerful low-end response. It sports a lightweight T6 aluminum shell, an advanced 4-way crossover system with 9 passive components, and the upgraded IMPACT2 isobaric dual-subwoofer setup for tight, impactful bass. Treble is handled with precision thanks to improved EST driver integration for smoother and more extended highs. The MKIV also introduces the new Chocolate modular cable system, offering both 4.4mm balanced and 3.5mm unbalanced terminations with silver-plated OFC wires. A versatile flagship IEM combining technical excellence with customizable tuning.

The driver configuration is Tribrid. It consists of 2 Dynamic Driver, 6 Balanced Armature & 2 Electrostatic. This IEM was released around June 2025.

Brand Information

This Chinese brand specializes in designing and manufacturing high-end IEMs, blending precision engineering with creative tuning philosophies. They cater to audio enthusiasts seeking nuanced sound profiles, often collaborating with renowned audiophile communities and experts.

Technical/Other Specifications

Drivers
Driver Types	2DD (8mm) + 6BA + 2EST (Sonion E50) + 1 Sonion 28UAP
Crossover	4-way crossover with 4 sound tubes+2 ultra-high frequency drivers+4 high frequency drivers+2 mid frequency drivers+2 low frequency drivers

Audio Performance
Sensitivity	100 dB/mW
Frequency Response	10Hz – 44kHz
Impedance	10/9 Ω

Build & Design

Build & Design
Shell	Aluminium with 2 faceplates options
Customizable	Yes

Cable
Connectors	4.4mm balanced and 3.5mm unbalanced

Accessories
Eartips	3 Sets of THIEAUDIO Ear Tips (S/M/L)

General Tags

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Highlevel & Tierlist

First Overview, Tierlist & Ratings

Overall, Packaging & Quality

This section offers a broad look at the general quality, packaging, and everyday usability of the IEM—beyond just the sound. From build integrity and comfort to cable quality and included accessories, each aspect is carefully rated to help you understand the overall experience. Whether you're a casual listener or a gear enthusiast, this overview gives insight into what it’s like to unbox, wear, and live with the IEM on a daily basis. Think of it as the foundation before we dive deeper into performance.

Sound

8.8 / 10

Comfort Fit

8.0 / 10

Build Quality

7.8 / 10

Stock Cable

7.3 / 10

Accessories

6.8 / 10

Tier List

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Sound Characteristics

Ratings sound, tonal signature & target group

Ratings, Sound Analysis & Tags

This section dives into how the IEM sounds — not just in technical terms, but also in how it feels to the listener. Ratings here reflect detailed impressions across a wide range of sonic aspects, from sub-bass rumble to treble sparkle, from note weight to soundstage width. In addition, the Tonal Signature slider helps visualize the IEM’s position between opposing characteristics like dark vs. bright or smooth vs. crisp — giving a quick feel for its personality. Lastly, the Target Group graph shows who this IEM is best suited for: bassheads, treble lovers, vocal fans, or those seeking balance. Combined with genre recommendations, this section helps you understand whether the IEM fits your taste — before you even hit play.

Sound Analysis

Basslines maintain a blended presence that supports the mix. Low frequencies come through with depth and slam, energizing the mix. The bass feel is lush and dynamic, adding punch to every hit. Lower mids are rich and rich, giving warmth to the mix. Upper mids feel cohesive and stay comfortably in check. The lower treble is consistent, helping articulation without harshness. The top end is fluid with a touch of brilliance. Soundstage is even, offering decent space and separation. Details are crisp and bring music to life. Elements remain mostly distinct in the mix. The mix stays transparent even with overlapping elements. Notes carry a full-bodied and powerful sense of weight. Slam is powerful and hits with commanding force. Treble peaks are crisp and energetic without discomfort. Acoustic tones sound organic and lifelike. The tuning feels musical and skillful. Texture is warm and detailed, adding realism to instruments.

Technical Tags:

estdd

Sound Characteristics

Tonal Signature

DARK

BRIGHT

WARM

NEUTRAL

SOFT

ANALYTICAL

SMOOTH

CRISP

RELAXED

ENGAGING

MUSICAL

DRY

Target Group

You will love them listening to these genres:

dancehallrap

Rankings

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This section is based on all ratings. Every day, this section gets updated and can only consider ratings, that were made here on ondaio. So keep rating :)

Cantor

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Average Rating: 7.9

Match: 96%

Variations

Moondrop

Average Rating: 7

Match: 95%

Mk12 Turris

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Average Rating: 7.2

Match: 95%

IER-Z1R

Sony

Average Rating: 8.6

Match: 90%

External Reviews

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Insights

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FAQs

FAQs for every question you have.

Frequently Asked Questions

What makes premium IEMs stand out?

Premium IEMs, typically in the $1000–$2000 range, are built for discerning listeners who want the very best. These models often feature custom-tuned electrostatic drivers, exotic materials like titanium or stabilized wood, and highly optimized internal acoustics. Manufacturers in this tier invest heavily in R&D, aiming for precise tonal balance, holographic staging, and exceptional technical performance across the frequency range. They're not just tools, but objects of craftsmanship – often with attention to aesthetic design and ergonomic comfort. Whether you're a studio engineer or an audiophile, this level offers detail, refinement, and emotional engagement that cheaper sets rarely match.

What is the sound character of dynamic drivers?

Dynamic drivers are known for delivering punchy bass and a natural sound presentation. They rely on a moving coil and diaphragm mechanism similar to traditional speakers, allowing for strong low-end response, good energy, and musicality. Well-tuned DDs often excel in bass impact and warmth, though some may lack detail compared to more technical driver types.

How do balanced armature drivers affect sound?

Balanced Armature (BA) drivers are highly efficient and designed to focus on specific frequency ranges. They excel in detail retrieval, fast transients, and clarity — especially in the mids and highs. However, they may sound less natural in the bass unless paired with a dynamic driver. Multi-BA configurations allow for tailored tuning and separation across frequencies.

What are EST drivers good for?

Electrostatic (EST) drivers are specialized tweeters used to enhance treble extension and microdetail. They're extremely fast and capable of producing airy, spacious highs without harshness. ESTs are often used in tribrid configurations and require a transformer due to their unique electrical demands. They add finesse and sparkle, especially for classical, acoustic, and ambient genres.

Does this IEM support tuning switches?

Yes, this model features built-in tuning switches, allowing you to adjust its sound profile. This flexibility makes it suitable for different genres and user preferences.

Does this IEM use EST drivers?

Yes, it features electrostatic (EST) drivers for super high-frequency extension and air. These are often used in hybrid setups for sparkle and finesse.

Comments

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COMMENTS

2025-06-21:

I need it !!!!!!!!

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2025-06-21:

BOOM!

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Monarch Mk4Thieaudio

Score

Tags

Release Dates

IEM Description

Brand Information

Technical/Other Specifications

General Tags

Highlevel & Tierlist

First Overview, Tierlist & Ratings

Overall, Packaging & Quality

Tier List

Sound Characteristics

Ratings sound, tonal signature & target group

Sound Analysis

Sound Characteristics

Tonal Signature

Target Group

Rankings

You might be interested in our lists we created. Check them out:

Best IEMs Under 2000

Similar IEMs

Similar sounding, similar rated. See other models or compare them directly.

Cantor

AFUL

Variations

Moondrop

Mk12 Turris

Hidizs

IER-Z1R

Sony

External Reviews

Check if our collected data is matching other reviews.

Insights

Our beloved short articles.

FAQs

FAQs for every question you have.

What makes premium IEMs stand out?

What is the sound character of dynamic drivers?

How do balanced armature drivers affect sound?

What are EST drivers good for?

Does this IEM support tuning switches?

Does this IEM use EST drivers?

Comments

Join the dommunity.

COMMENTS

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