Wired IEMs
Audeze Euclid
68Good
$920
Full review dataAudeze Euclid vs THIEAUDIO Monarch MKIV: which should you buy?
On aggregated review scores the THIEAUDIO Monarch MKIV comes out ahead with a HearWiki score of 84. The full breakdown - sub-scores, specs and what reviewers actually said - is below.
Our pick: THIEAUDIO Monarch MKIV - Outstanding overall at around $1149.
Wired IEMs
THIEAUDIO Monarch MKIV
84Outstanding
$1,150
Full review dataScore breakdown
Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.
THIEAUDIO Monarch MKIV leads on 3 of 5 measures.
- Audeze Euclid
- THIEAUDIO Monarch MKIV
HearWiki score
68
84
Sound
8.4
9.4
Battery
3.8
-
Value
-
7.6
Price (USD)
$920
$1,150
Generation & platform
The scores rank quality. This is the other question: is the newer one actually newer technology, or the same platform in a new shell?
Same generation
The THIEAUDIO Monarch MKIV is 4 years newer, but it is the same generation of hardware: nothing in the radio, the codecs or the noise cancelling separates them. Nothing separates them on convenience features either, so the choice comes down to tuning and price. For 4 years between them, that is a thin return - treat this as a restyle rather than a new platform.
- Euclid2021
- Monarch MKIV20254 yr newer
Specifications
EuclidMonarch MKIV
- Type
- Wired IEMs
- Wired IEMs
- Price (USD)
- $920
- $1,150
- HearWiki score
- 68
- 84
- Released
- 2021
- 2025
- Availability
- Discontinued
- Sold new
- Driver
- 18 mm planar magnetic
- 2DD + 6BA + 2EST tribrid
- Driver type
- planar
- tribrid
- Driver configuration
- -
- 2DD + 6BA + 2EST
- Driver size
- 18 mm
- 8 mm
- Drivers per side
- 1
- 10
- Frequency response
- 10 Hz - 50 kHz
- -
- Impedance
- 12 Ω
- -
- Sensitivity
- 105 dB/mW
- -
- Bluetooth
- 5.0
- -
- Codecs
- AAC, aptX HD
- -
- Multipoint pairing
- No
- -
- Battery life
- 8 h
- -
- Active noise cancelling
- No
- -
- ANC type
- none
- -
- Transparency mode
- No
- -
- Companion app
- No
- -
- Custom EQ
- No
- -
- Wear detection
- No
- -
- Controls
- buttons
- -
- Weight
- 15 g
- -
- Water resistance
- none
- -
- Connector
- MMCX
- -
- Model code
- 115-IE-1020-01
- -
What reviewers said
Audeze Euclid
The Audeze Euclid is a premium wired in-ear monitor featuring an 18 mm planar magnetic driver that delivers a wide, neutral soundstage with strong clarity in the mids and highs, making it a solid technical performer. Its ambitious specs, including a 10 Hz–50 kHz frequency response and low 12-ohm impedance, are matched by a detailed, insightful presentation, though the tuning may leave some wanting a bit more bass punch. With Bluetooth 5.0 support via AAC and aptX HD codecs, it offers versatile connectivity, but lacks active noise cancellation and app-based customization.
- Pro:Wide and neutral soundstage with excellent clarity
- Pro:Detailed and insightful audio reproduction
- Pro:Premium build with MMCX connectors and Bluetooth support
- Con:Bass may lack punch for some listeners
- Con:No active noise cancellation or transparency mode
- Con:Battery life is limited to 8 hours
THIEAUDIO Monarch MKIV
The Monarch MKIV is a flagship in-ear monitor built around a ten-driver tribrid configuration, blending dual 8mm dynamic drivers, six balanced armatures, and two electrostatic tweeters. It offers a studio-neutral sound signature with an additional switchable bass-boost mode for listeners who prefer a more impactful low end.
- Pro:Reference-grade neutral tuning with excellent clarity
- Pro:Versatile bass boost mode adds flexibility
- Pro:Detailed and extended treble from electrostatic tweeters
- Con:High price point limits accessibility
- Con:Requires a capable source to perform at its best
- Con:Large shell may not suit smaller ears
Summaries are AI-condensed and paraphrased from published reviews and specs - not original hands-on testing. More on our method.
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