THIEAUDIO Monarch MKIV
2DD + 6BA + 2EST Flagship IEM

Customizable Dual Tuning Modes
Switch effortlessly between studio-neutral and basshead sound with the all-new tuning switch. Choose “STANDARD” for reference-grade clarity or activate “RUMBLE” to boost sub-bass by 3dB for deep, thunderous lows. It's two distinct listening experiences in one high-performance IEM.

IMPACT² Dual Subwoofer System
Powered by twin 8mm dynamic drivers in an isobaric chamber, IMPACT² delivers fast, punchy, and textured sub-bass with exceptional control. Enjoy powerful lows without sacrificing balance or precision, elevating your music with deep, clean impact.

T6 Aircraft Grade Aluminum Construction
The Monarch MKIV elevates its status by utilizing a premium T6 aluminum alloy shell. Precision CNC engineering achieves our most durable, yet lightweight, shell. Surface hardening also ensures more scratch resistance and corrosion resistance against sweat. Experience the fullness of your music with featherlight comfort in your ears.

Refined Treble with EST Drivers
Redesigned electrostatic drivers extend treble response to 40kHz while ensuring a smoother, more natural upper range. Improved crossover tuning delivers seamless transitions and airy soundstage, letting vocals and instruments shine with crystal clarity and realism.

Technical Details
Driver
2DD (8mm) + 6BA + 2EST (Sonion E50) + 1 Sonion 28UAP

Crossover
4-way crossover with 4 sound tubes+2 ultra-high frequency drivers+4 high frequency drivers+2 mid frequency drivers+2 low frequency drivers

Frequency Response
10Hz – 44kHz

Impedance
10/9 ohms (±1 ohm) @1kHz

Sensitivity
100dB ±1dB @1kHz

Total Harmonic Distortion (THD)
<1% @1kHz

Inside the Box
THIEAUDIO Monarch MKIV In-Ear Monitors

New THIEAUDIO Upgrade Cable

3 Sets of THIEAUDIO Ear Tips (S/M/L)

Cable Tie

Cleaning Cloth

User Manual & After-Sales Service Card

Thank You Card

THIEAUDIO Monarch MKIV Stickers ×2