ThieAudio
ThieAudio Monarch MKII
Last updated August 12, 2026
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A 1DD+6BA+2EST tribrid flagship IEM with a modular Smart Switch cable covering 2.5mm, 3.5mm, and 4.4mm.
Official product pageOverview
The Monarch MKII redesigns ThieAudio's flagship IEM with a 10mm composite diaphragm dynamic driver for tighter bass, four repositioned midrange balanced armatures (Sonion/Knowles) for a studio-neutral midrange, and repositioned electrostatic drivers for extended, lower-resonance treble. The bundled Smart Switch cable has modular 2.5mm/3.5mm/4.4mm plugs, removing the need for separate adapters.
Pros
- 1DD+6BA+2EST tribrid configuration with electrostatic drivers for extended treble
- Modular Smart Switch cable with interchangeable 2.5/3.5/4.4mm terminations — no separate adapters needed
- Studio-neutral midrange tuning aimed at critical listening/monitoring
- Comes with a carrying case, cleaning cloth, and a full set of termination adapters
Cons
- $999 price point with 3-4 week pre-order processing
- Pre-orders are non-cancellable and non-refundable per Linsoul's policy
- 36Ω impedance / 108dB sensitivity is more power-hungry than typical BA-only IEMs
Specifications
- Driver Configuration
- 1x 10mm Dynamic Driver, 6x Balanced Armatures (Sonion/Knowles), 2x Electrostatic Drivers
- Impedance
- 36Ω
- Sensitivity
- 108dB/mW
- Connector
- 0.78mm 2-pin
- Cable Length
- 1.2m
- Cable Type
- 26AWG OCC silver-plated, fabric coating
- Terminations
- Smart Switch — 2.5mm, 3.5mm, 4.4mm interchangeable
- Nozzle Size
- 5.4mm stem / 6mm lip
FAQs
What is the Smart Switch cable?
A modular cable system with interchangeable 2.5mm, 3.5mm, and 4.4mm plugs built in, so no separate adapters are needed to match different sources.
What's included in the box?
The Monarch MKII IEM, the Smart Switch cable, S/M/L ear tips, a carrying case, a cleaning cloth, 3 adapter plugs, and a user manual.
How long is the pre-order wait?
Linsoul lists a 3-4 week processing time for this model, and pre-orders are non-cancellable and non-refundable.
