ThieAudio
ThieAudio Monarch MKIII
Last updated August 12, 2026
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ThieAudio's latest flagship tribrid IEM with a dual 10mm IMPACT2 isobaric bass system and extended Sonion electrostatic treble.
Official product pageOverview
The Monarch MKIII centers on ThieAudio's IMPACT2 subwoofer solution — two 10mm composite diaphragm dynamic drivers in an isobaric chamber for punchier bass without losing tonal balance — paired with Sonion's latest electrostatic drivers extended to 15-20kHz and a true 4-way passive crossover with nine components. The 1.2m cable is 22AWG 6N OCC silver-plated and graphene silver-plated, with modular 2.5mm/3.5mm/4.4mm terminations.
Pros
- IMPACT2 dual 10mm isobaric dynamic driver system for enhanced bass punch without bloat
- Sonion electrostatic drivers extended to 20kHz for airier treble
- True 4-way passive crossover with 9 components for tonal accuracy
- Modular cable terminations (2.5mm/3.5mm/4.4mm) included
Cons
- A custom faceplate option raises the price to $1,149
- 2-4 week (default) or 6-8 week (custom) pre-order lead time
- Custom orders are non-cancellable per Linsoul's policy
Specifications
- Driver Configuration
- 2DD + 6BA + 2EST (IMPACT2 dual 10mm composite dynamic, Knowles DWFK×2, Sonion 28UAP×1, Sonion EST)
- Sensitivity
- 99dB @ 1kHz (±1dB)
- Impedance
- 18Ω
- Frequency Response
- 20Hz–80kHz
- Crossover
- 4-way passive, 4 sound bores
- Connector
- 0.78mm 2-pin
- Cable
- 1.2m, 22AWG 6N OCC silver-plated & graphene silver-plated
- Terminations
- Modular — 2.5mm, 3.5mm, 4.4mm
FAQs
What is the IMPACT2 system?
A dual 10mm composite-diaphragm dynamic driver arrangement in an isobaric chamber, designed to boost bass punch without compromising tonal balance.
Can I get a custom faceplate?
Yes — a custom design option is available for $1,149 instead of the $999 default, with a longer 6-8 week processing time.
Is the cable the same as the MKII's Smart Switch cable?
Both use modular 2.5mm/3.5mm/4.4mm terminations, though the MKIII's cable is a newer 22AWG 6N OCC silver-plated and graphene silver-plated design.
