FiiO FH19 vs THIEAUDIO Monarch MKIV: which should you buy?

Specs, scores and condensed review verdicts for the FiiO FH19 vs THIEAUDIO Monarch MKIV, side by side. Where a product has no HearWiki score yet, not enough reviews have been aggregated to rate it.

Wired IEMs

FiiO FH19

Not yet scored

$600

Full review data

Wired IEMs

Score breakdown

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

THIEAUDIO Monarch MKIV leads on 3 of 4 measures.

FiiO FH19
THIEAUDIO Monarch MKIV

HearWiki score

Sound

9.4

Value

7.6

Price (USD)

$600

$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

THIEAUDIO Monarch MKIV (2025) against FiiO FH19 (2024). These are 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.

FH192024
Monarch MKIV20251 yr newer

Specifications

FH19Monarch MKIV

Type: Wired IEMs; Wired IEMs
Price (USD): $600; $1,150
HearWiki score: Not scored; 84
Released: 2024; 2025
Availability: Discontinued; Sold new
Driver: 1DD + 6BA hybrid; 2DD + 6BA + 2EST tribrid
Driver type: hybrid; tribrid
Driver configuration: 1DD + 6BA; 2DD + 6BA + 2EST
Driver size: 13.7 mm; 8 mm
Drivers per side: 7; 10
Frequency response: 8 Hz - 40 kHz; -
Impedance: 16 Ω; -
Sensitivity: 109 dB/mW; -
Active noise cancelling: No; -
Controls: buttons; -
Weight: 12 g; -
Detachable cable: Yes; -
USB-C: No; -

Specification comparison of FiiO FH19 vs THIEAUDIO Monarch MKIV
Spec	FiiO FH19	THIEAUDIO Monarch MKIV
Type	Wired IEMs	Wired IEMs
Price (USD)	$600	$1,150
HearWiki score	Not scored	84 / 100 Outstanding
Released	2024	2025
Audio
Driver	1DD + 6BA hybrid	2DD + 6BA + 2EST tribrid
Driver type	hybrid	tribrid
Driver configuration	1DD + 6BA	2DD + 6BA + 2EST
Driver size	13.7 mm	8 mm
Drivers per side	7	10
Frequency response	8 Hz - 40 kHz	-
Impedance	16 Ω	-
Sensitivity	109 dB/mW	-
Features
Active noise cancelling	No	-
Controls	buttons	-
Design
Weight	12 g	-
Detachable cable	Yes	-
USB-C	No	-

What reviewers said

FiiO FH19

The FiiO FH19 is a premium hybrid in-ear monitor that pairs a 13.7mm dynamic driver with six balanced armature drivers for a detailed, versatile sound. Its semi-open-back design and swappable filters offer tuning flexibility, while the detachable cable and included accessories add convenience for wired listening. With no active noise cancellation, it focuses purely on passive isolation and audio performance.

Pro:Rich, balanced hybrid sound with good separation
Pro:Swappable audio filters for tuning flexibility
Pro:Detachable cable for easy replacement or upgrades

Con:No active noise cancellation
Con:Requires a good source to drive efficiently
Con:Semi-open-back design may leak sound

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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New comparison FiiO FH19 THIEAUDIO Monarch MKIV