Between the Aria 2 and Monarch MKIII, the Aria 2 comes out ahead in sensitivity, while the Monarch MKIII wins on impedance and driver count. Overall, the Aria 2 scores 65.4 and the Monarch MKIII scores 72.9 on our Mars Score.
Which should you buy?
The Monarch MKIII edges ahead on the Mars Score (65.4 vs 72.9), but the 7.5-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Aria 2 if you care most about sensitivity. The biggest gaps in its favor are sensitivity.
Pick the Monarch MKIII if you care most about impedance and driver count. Its strongest claims are impedance, driver count.
Both ship with comparable detachable cable, so those specs don't separate the two — focus on the differences below.
Bottom line: the Monarch MKIII is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Moondrop - Aria 2 wins
- ▲Sensitivity — 8.93% more. 122 dB vs 112 dB.
Why ThieAudio - Monarch MKIII wins
- ▲Impedance — 10.00 Ω less. 22 vs 32.
- ▲Driver count — 9.00 more. 10 vs 1.
Spec comparison
Drivers
| Spec | Moondrop - Aria 2 | ThieAudio - Monarch MKIII |
|---|---|---|
| Driver count | 1 | 10lead |
| Driver types | Dynamic | 1DD + 6BA + 2EST + 1 Bone Conduction Tribrid |
| Impedanceⓘ | 32 Ω | 22 Ωlead |
| Sensitivityⓘ | 122 dBlead | 112 dB |
Build
| Spec | Moondrop - Aria 2 | ThieAudio - Monarch MKIII |
|---|---|---|
| Detachable cable | true | true |
| Connector | 0.78mm 2-pinlead | 2-pin |
Spec-level deep dives
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