ThieAudio Monarch MK4 - Reviews & Ratings
1 Review (S Tier | 9.5/10)
Summary
Reviewers consider the ThieAudio Monarch MK4 to be a reference point that defines its class and sets expectations for others. It places notes with confident clarity and arranges a natural, three-dimensional stage. Everything sounds purposeful and unforced.
ThieAudio Monarch MK4 Details
Driver Configuration: 2DD+6BA+2EST
Tuning Type: Neutral with Bass Boost, U-Shaped
Brand: ThieAudio Top ThieAudio IEMs
Price (Msrp): $1,149
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Review
2025-07-25
9.5
Reviewer Score
Youtube Video Summary
Priced between $1,150 and $1,300 depending on custom faceplate options like the butterfly design shown, the Thieaudio Monarch MK IV boasts exceptional build quality with a large but well-contoured titanium shell offering a secure and comfortable fit. Key features include the innovative rumble switch for adjustable bass levels on the fly, a durable two-pin connector, and a solid feel that inspires confidence in longevity. While the included accessories are considered fair but unexciting, the shell's customization potential and rugged construction are major highlights.
Sonically, the Monarch MK IV delivers a detailed, exciting, and clean sound signature that stands as the best in the Monarch lineage. The rumble switch provides two distinct profiles: the red switch (no rumble) offers a balanced, tactful bass presentation, while the gold switch (rumble) adds a satisfying sub-bass shelf ideal for genres like hip-hop. Treble performance is notably improved over the MK III, though a 10k peak requires careful ear tip selection for some listeners. It trades blows with flagships like the $3,000 Annihilator (better sub-bass focus) and the $1,800 Elysian Apostle (more vocal forward), often matching or exceeding their technicalities while offering its unique tuning flexibility.
Scoring a top-tier 9.8, the Monarch MK IV earns its place through a compelling combination of premium build, the highly functional rumble switch, and outstanding sound quality that feels both special and refined. While acknowledging the high price, it represents significant value against competitors like the $2,000 Thieaudio Valhalla or the fiddly Grand Maestro, offering a feature-rich, durable, and sonically excellent package that justifies its position as a current summit-fi favorite.
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User Reviews
Average User Scores
Average User Score:
Based on 1 user reviews
9Outstanding
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You need to be signed in to write your own reviewImpressive sound experience and the built quality is finally worth the price (compared to Mk3). I "upgraded" my Mk3 and I am happy with it.
Pros
I don't regret buying those. I would not describe them as a huge upgrade to the Mk3 in terms of sound, but it is noticeable. Built quality and overall experience much more premium than MK3.Cons
The designs of the shells are a matter of taste.Compare ThieAudio Monarch MK4 to popular alternatives
VS
| IEM | alt. Score |
|---|---|
|
ThieAudio Monarch MK4 vs. AFUL Dawn-X
AFUL Dawn-X offers better mids.
|
9.6 |
|
ThieAudio Monarch MK4 vs. Dunu Glacier
Dunu Glacier offers better dynamics.
|
9.3 |
|
ThieAudio Monarch MK4 vs. Campfire Audio Alien Brain
Similar overall performance.
|
8.8 |
|
ThieAudio Monarch MK4 vs. Letshuoer Mystic 8
Similar overall performance.
|
8.6 |
|
ThieAudio Monarch MK4 vs. Campfire Moon Rover
Campfire Moon Rover offers better mids.
|
8.5 |
|
ThieAudio Monarch MK4 vs. Thieaudio Hype 10
Similar overall performance.
|
8.5 |
|
ThieAudio Monarch MK4 vs. Thieaudio Monarch Mk2
Similar overall performance.
|
8.5 |
|
ThieAudio Monarch MK4 vs. Thieaudio Monarch MK3
Similar overall performance.
|
8.5 |
|
ThieAudio Monarch MK4 vs. 7th Acoustics Supernova
7th Acoustics Supernova offers better mids.
|
8.5 |
|
ThieAudio Monarch MK4 vs. Thieaudio Origin
Thieaudio Origin offers better dynamics.
|
8.5 |
IEM Finder Quiz
newAverage Technical & Tuning Grades
Average Tunign Grade
S-- The response feels meticulously dialed in, combining neutrality with inviting warmth. Dynamic swings remain tonally accurate.
Average Technical Grade
S- The technical ceiling is high here, revealing fine gradations without breaking composure. Every instrument carves out its own pocket in the mix.