64 Audio Duo VS Thieaudio Monarch MK3

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64 Audio Duo and Thieaudio Monarch MK3 use 1DD+1BA and 2DD+6BA+2EST driver setups respectively. 64 Audio Duo costs $1,200 while Thieaudio Monarch MK3 costs $1,000. 64 Audio Duo is $200 more expensive. Thieaudio Monarch MK3 holds a decisive 3-point edge in reviewer scores (5.1 vs 8.1). Thieaudio Monarch MK3 carries a user score of 6.8. 64 Audio Duo has better bass with a 0.5-point edge, Thieaudio Monarch MK3 has better mids with a 0.7-point edge, Thieaudio Monarch MK3 has better treble with a 0.8-point edge, Thieaudio Monarch MK3 has slightly better dynamics with a 0.3-point edge, Thieaudio Monarch MK3 has significantly better details with a 2.8-point edge and Thieaudio Monarch MK3 has significantly better imaging with a 1.4-point edge.

Metric	64 Audio Duo	Thieaudio Monarch MK3
Bass	8	7.5
Mids	7	7.7
Treble	7	7.8
Details	5	7.8
Soundstage	5.1	8
Imaging	6	7.4
Dynamics	7	7.3
Tonality	6.2	7.8
Technicalities	5.5	7.8

64 Audio Duo Aggregated Review Score

Average Reviewer Score:

5.1

Mixed to Negative

Show all 64 Audio Duo reviews

Thieaudio Monarch MK3 Aggregated Review Score

Average Reviewer Score:

8.1

Very Positive

Show all Thieaudio Monarch MK3 reviews

Driver Configuration: 1DD+1BA

Tuning Type: Bassy Neutral

Brand: 64 Audio Top 64 Audio IEMs

Price (Msrp): $1,200

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Driver Configuration: 2DD+6BA+2EST

Tuning Type: U-Shaped

Brand: ThieAudio Top ThieAudio IEMs

Price (Msrp): $1,000

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$999

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$999

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64 Audio Duo User Review Score

Average User Score: n/a

Based on 0 user reviews

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Thieaudio Monarch MK3 User Review Score

Average User Score:

Based on 1 user reviews

6.8

Cautiously Favorable

64 Audio Duo Gaming Score

The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

4.7

Gaming Grade

Thieaudio Monarch MK3 Gaming Score

The gaming score is prioritizing technical capabilities of the IEM (Separation, Layering, Soundstage) and good value.

Gaming Score

7.5

Gaming Grade

64 Audio Duo Scorings

Average Tunign Grade

Generally enjoyable tonal character with some noticeable unevenness. Maintains listenability while showing room for refinement in frequency balance.

Average Technical Grade

B-

Satisfactory technical performance. Handles basic detail retrieval adequately in most tracks. Maintains reasonable cohesion in simpler arrangements.

Bass A+

Excellent bass response - powerful yet controlled. Deep extension with authoritative slam while maintaining clarity.

Mids A-

Excellent midrange with natural timbre and great detail retrieval. Vocals are forward and emotive with lifelike instrument reproduction.

Treble A-

Excellent treble: airy, extended and well-controlled. Great micro-detail retrieval without sibilance or harshness.

Dynamics A-

Excellent dynamics with great contrast and speed. Transients are crisp and micro-details are clearly articulated.

Details C+

Decent detail retrieval. Handles most textures adequately though micro-details and ambient cues could be more pronounced.

Imaging B

Good imaging with precise instrument placement. Clear localization within the soundstage including front/back positioning.

Gaming C

Minimal environmental definition provides only general audio cues. Suitable for games where positioning isn't critical. Bad value-to-cost for gaming purpose - not recommended

Thieaudio Monarch MK3 Scorings

Average Tunign Grade

Well-executed tonal character. No major flaws with good technical control. Smooth presentation works with multiple genres.

Average Technical Grade

Good technical performance. Clear separation and decent detail retrieval across various tracks. Soundstage shows reasonable width and depth.

Bass A

Strong, well-defined bass with good texture. Delivers satisfying punch and rumble without overwhelming other frequencies.

Mids A

Excellent midrange with natural timbre and great detail retrieval. Vocals are forward and emotive with lifelike instrument reproduction.

Treble A

Excellent treble: airy, extended and well-controlled. Great micro-detail retrieval without sibilance or harshness.

Dynamics A-

Excellent dynamics with great contrast and speed. Transients are crisp and micro-details are clearly articulated.

Soundstage A+

Exceptional soundstage with holographic imaging. Creates a truly three-dimensional space where instruments float naturally around you.

Details A

Excellent detail retrieval: highly resolving without being clinical. Effortlessly reveals micro-details and textural subtleties.

Imaging A-

Excellent imaging: precise and stable placement. Instruments occupy specific points in space with tangible positions.

Gaming A

Clear spatial presentation handles directional cues effectively. Distinguishes key gameplay sounds while maintaining decent immersion. Bad value-to-cost for gaming purpose - not recommended

64 Audio Duo Reviews

Reviewed by: Precogvision

6.4 Reviewer Score

A- Tuning

B Tech

Strong dynamics and easy-going signature that could use more detail in the midrange.

Precogvision original ranking

Precogvision Youtube Channel

Bass: A+ Mids: A- Treble: A- Dynamics: A- Details: C+ Imaging: B

Reviewed by: Crin

5 Reviewer Score

C+ Tuning

C+ Tech

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Crin original ranking

Crin Youtube Channel

Reviewed by: Super* Review

4* * score normalized

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Super* Review original ranking

Super* Review Youtube Channel

Thieaudio Monarch MK3 Reviews

Reviewed by: Z-Reviews

10 * score normalized

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Z-Reviews original ranking

Z-Reviews Youtube Channel

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Price: $999

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Reviewed by: Jays Audio

8.5 Reviewer Score

S Tuning

S- Tech

Better low-end texture and overall more engaging than MK2, but lacks the mid-range/vocal magic, so depending on your preference either is great. Still TOTL tech like MK2. Great all-rounder.

Jays Audio original ranking

Jays Audio Youtube Channel

Reviewed by: Jaytiss

8.5 Reviewer Score

A Tuning

A- Tech

Fatiging at times for me, too fun at times.

Jaytiss original ranking

Jaytiss Youtube Channel

Mids: A- Treble: A- Dynamics: A+ Soundstage: A+

Reviewed by: Shuwa-T

8.2 Reviewer Score

A+ Tuning

A+ Tech

Better bass response compared to the mk2 Trades off the lush midrange in place of a cleaner sounding, almost boring midrange

Shuwa-T original ranking

Shuwa-T Website

Bass: S- Mids: A+ Treble: A+ Soundstage: A+ Details: A+ Imaging: S-

Reviewed by: Gizaudio Axel

8 Reviewer Score

A Tuning

A+ Tech

I prefer the Monarch MK II for its tonality, vocals, and timbre, but I get why some prefer the MK III. More bass, treble, and detail than the Monarch MK II. The vocal magic of the Monarch MK II is gone.

Gizaudio Axel original ranking

Gizaudio Axel Youtube Channel

Reviewed by: Smirk Audio

7.9 Reviewer Score

A Tuning

A+ Tech

Elevated, well-textured mid-bass. Pleasant mids. Elevated upper-treble may be pesky to some.

Smirk Audio original ranking

Smirk Audio Head-Fi Profile

Bass: A+ Mids: A+ Treble: A Dynamics: A+ Details: A+ Imaging: A+

Reviewed by: Tim Tuned

2025-08-14

7.5 Reviewer Score

A Tuning

S Tech

MK2 but more fun and more V-shape Not as natural in timbre

Tim Tuned original ranking

Tim Tuned Youtube Channel

Bass: A+ Mids: A+ Treble: A+

Reviewed by: Precogvision

7.3 Reviewer Score

A- Tuning

A- Tech

Still perplexingly poor bass performance, but improves upon the Monarch MKII's treble extension noticeably.

Precogvision original ranking

Precogvision Youtube Channel

Bass: B Mids: A+ Treble: A+ Dynamics: B Details: A+ Imaging: A-

Reviewed by: Nymz

7.1 Reviewer Score

A- Tuning

B+ Tech

An improvement in the bass and treble department over the Mk2, but without the same special sauce in the mid-range and with some imaging problems still.

Nymz original ranking

Nymz Website

Bass: A- Mids: A- Treble: A+ Details: A- Imaging: B

Reviewed by: Fresh Reviews

7* * The score of this reviewer influences only the Gaming Score

Borders A for some titles

Fresh Reviews original ranking

Fresh Reviews Youtube Channel

64 Audio Duo User Reviews

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Thieaudio Monarch MK3 User Reviews

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Makavelian 2025-06-16 05:54:55

6.8

If this is what 'fun' sounds like, I ain't about it.

Pros

Detail retrieval

Cons

Recessed mids and odd timbre.

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64 Audio Duo VS Thieaudio Monarch MK3

IEM Comparison: Expert & Community Scores Side-by-Side

Insights

64 Audio Duo Aggregated Review Score

Average Reviewer Scores

Thieaudio Monarch MK3 Aggregated Review Score

Average Reviewer Scores

64 Audio Duo Details

Thieaudio Monarch MK3 Details

64 Audio Duo User Review Score

Average User Scores

Thieaudio Monarch MK3 User Review Score

Average User Scores

64 Audio Duo Gaming Score

Gaming Score & Grade

Thieaudio Monarch MK3 Gaming Score

Gaming Score & Grade

64 Audio Duo Scorings

Average Technical & Tuning Grades

Thieaudio Monarch MK3 Scorings

Average Technical & Tuning Grades

64 Audio Duo Reviews

Reviewed by: Precogvision

Reviewed by: Crin

Reviewed by: Super* Review

Thieaudio Monarch MK3 Reviews

Reviewed by: Z-Reviews

Buy Thieaudio Monarch MK3 on Linsoul

Reviewed by: Jays Audio

Reviewed by: Jaytiss

Reviewed by: Shuwa-T

Reviewed by: Gizaudio Axel

Reviewed by: Smirk Audio

Reviewed by: Tim Tuned

Reviewed by: Precogvision

Reviewed by: Nymz

Reviewed by: Fresh Reviews

Buy Thieaudio Monarch MK3 on Aliexpress

64 Audio Duo User Reviews

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Cons

Thieaudio Monarch MK3 User Reviews

Pros

Cons

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