Campfire Audio Bonneville 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

Score breakdown

Each axis is a 0–10 blend of what reviewers scored, not a lab measurement.

THIEAUDIO Monarch MKIV leads on 4 of 4 measures.

Campfire Audio Bonneville
THIEAUDIO Monarch MKIV

HearWiki score

Sound

8.4

9.4

Value

7.0

7.6

Price (USD)

$1,170

$1,150

Specifications

BonnevilleMonarch MKIV

Type: Wired IEMs; Wired IEMs
Price (USD): $1,170; $1,150
HearWiki score: 69; 84
Released: 2023; 2025
Availability: Discontinued; Sold new
Driver: 1DD + 3BA hybrid; 2DD + 6BA + 2EST tribrid
Driver type: hybrid; tribrid
Driver configuration: 1DD + 3BA; 2DD + 6BA + 2EST
Driver size: 10 mm; 8 mm
Drivers per side: 4; 10
Frequency response: 5 Hz - 20 kHz; -
Sound signature: u-shaped; -
Impedance: 29 Ω; -
Sensitivity: 94 dB/mW; -
Weight: 9 g; -
Detachable cable: Yes; -
Connector: MMCX; -

Specification comparison of Campfire Audio Bonneville vs THIEAUDIO Monarch MKIV
Spec	Campfire Audio Bonneville	THIEAUDIO Monarch MKIV
Type	Wired IEMs	Wired IEMs
Price (USD)	$1,170	$1,150
HearWiki score	69 / 100 Good	84 / 100 Outstanding
Released	2023	2025
Audio
Driver	1DD + 3BA hybrid	2DD + 6BA + 2EST tribrid
Driver type	hybrid	tribrid
Driver configuration	1DD + 3BA	2DD + 6BA + 2EST
Driver size	10 mm	8 mm
Drivers per side	4	10
Frequency response	5 Hz - 20 kHz	-
Sound signature	u-shaped	-
Impedance	29 Ω	-
Sensitivity	94 dB/mW	-
Design
Weight	9 g	-
Detachable cable	Yes	-
Connector	MMCX	-

What reviewers said

Campfire Audio Bonneville

The Campfire Audio Bonneville is a premium hybrid earphone that pairs a 10mm dynamic driver with three balanced armatures to deliver a warm, U-shaped sound with strong bass impact and a spacious presentation. It's designed for musical enjoyment rather than strict neutrality, with an easy-to-drive 29-ohm impedance and comfortable, lightweight build. The included accessory package is generous, though its sound isolation is not the strongest in its class.

Pro:Punchy, impactful bass response
Pro:Warm, musical tuning with good technicalities
Pro:Easy to drive from most sources

Con:Sound isolation is weaker than some competitors
Con:Tuning leans warm rather than neutral
Con:Price is high for the feature set

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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