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Thieaudio Monarch MKIII In-Ear Headphones - Open Box

Thieaudio Monarch MKIII In-Ear Headphones - Open Box

Open Box More information
Open box items are final sale.
Regular price $999
Sale price $999 Regular price $1,099.00
Save 10%

Wearing style More information
Over-ear headphones sit over your ear and surround your ear with a ring of padding. On-ear headphones are padded but rest on top of your ear. In-ear monitors are worn inside your ear canal.


Connectivity More information
Connectivity refers to the method in which the headphones connect to the audio source. Headphones can be either wired or wireless.


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Thieaudio Monarch MKIII In-Ear Headphones - Open Box

Regular price $999
Sale price $999 Regular price $1,099.00
Save 10%

All Open-Box Thieaudio Monarch MKIII are tested, inspected and cleaned to be in like-new condition. 

Discover the unrivaled auditory bliss with the all-new Thieaudio Monarch MKIII In-Ear Headphones, now available at! Engineered to perfection, these cutting-edge in-ear headphones redefine the boundaries of sound fidelity, enveloping you in a captivating audio experience like never before.

*Faceplate customization is an extra $100. Order times may vary. Not all faceplates are compatible with different shells.

Key Features

  • IMPACT2: THIEAUDIO's latest innovation in personalized audio with a powerful subwoofer solution using isobaric design and composite diaphragm drivers.
  • Balanced Tonal Signature: The Monarch MKIII maintains a studio-monitor-like tonal excellence with clean, natural, and detailed sound, while offering a focused sub-bass impact.
  • Enhanced Ultra-Treble Output: The Monarch MKIII now features Sonion's electrostatic drivers and increased frequencies for a more comprehensive upper frequency extension, resulting in improved staging and resolution.
  • Improved Bass Quality: The addition of another 10mm subwoofer in IMPACT2 enhances the power and texture of the bass without compromising tonal integrity, providing better bass quality for an immersive audio experience.

New IMPACT2 Technology

IMPACT2 is a new subwoofer solution consisting of two 10mm composite diaphragm drivers arranged in an isobaric design. The addition of another 10mm subwoofer significantly enhances the power and texture of the bass, while our in-house isobaric chamber design keeps the frequency and pressure constant. This means you can enjoy better quality bass without sacrificing tonal integrity.

Meticulously Crafted

Crafted with meticulous precision, the Monarch MKIII boasts an exquisite design that seamlessly marries form with function. Its ergonomic and lightweight construction ensures a snug fit, granting you hours of comfortable listening pleasure, making it the ideal choice for on-the-go audiophiles and music enthusiasts alike.

Sonic Delights

Delve into a world of pure sonic delight as the Monarch MKIII boasts an upgraded driver configuration, elevating bass, mids, and trebles to new heights of brilliance. Experience the richness of every note, the clarity of vocals, and the depth of instrumentals in stunning detail.

New Upgrades, Ultimate Sound

Equipped with cutting-edge technology, the Monarch MKIII guarantees impeccable sound isolation, blocking out external noise distractions and immersing you in an unadulterated musical journey. Whether you crave the heart-pumping beats of your favorite tracks or the serene melodies of classical masterpieces, these in-ear headphones deliver an unparalleled listening experience.

Captivation For All

Designed to captivate both audiophiles and casual listeners, the Thieaudio Monarch MKIII combines style, comfort, and superior sound quality in one elegant package. Elevate your music appreciation to new heights and make these headphones your ultimate musical companions today.

Order your Thieaudio Monarch MKIII In-Ear Headphones now from and unlock the true potential of your favorite tunes. Upgrade your listening game and indulge in audio perfection with the Monarch MKIII - a masterpiece of sound engineering.

Technical Specifications

  • TYPE: In-Ear Monitors
  • DRIVERS: Sonion EST, Knowles DWFK 31785 (x2), Sonio 28UAP (x1), IMPACT2 (2 x 10mm Composite DD)
  • CROSSOVER: 4-Way Passive Crossover with 4 Sound Bores
  • SENSITIVITY: 99dB @ 1kHz (+/- 1dB)
  • IMPEDANCE: 20 ohms
  • CABLE DETAILS: 1.2 meter 22AWG 6N OCC Silver-Plated and Graphene Silver-Plated Cable
  • CABLE CONNECTORS: 2-pin 0.78mm
  • CABLE TERMINATION: Modular Termination with 2.5mm,3.5mm,4.4mm Interchangeable plugs

What's In The Box?

  • THIEAUDIO Monarch MKIII In-Ear Monitors
  • 22AWG 6N OCC Silver-Plated and Graphene Silver-Plated Cable With Modular System
  • 3 Pairs of Silicone Ear-tips
  • 3 Pairs of Foam Ear-tips
  • Carrying Case