Between the Aria 2 and IE 600, the Aria 2 comes out ahead in sensitivity, while the IE 600 wins on impedance. Overall, the Aria 2 scores 65.4 and the IE 600 scores 61.5 on our Mars Score.
Which should you buy?
The Aria 2 edges ahead on the Mars Score (65.4 vs 61.5), but the 3.9-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 IE 600 if you care most about impedance. Its strongest claims are impedance.
Both ship with comparable driver count, detachable cable, so those specs don't separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity tells you both are well-rounded; the differences are about trade-offs, not quality.
Why Moondrop - Aria 2 wins
- ▲Sensitivity — 3.39% more. 122 dB vs 118 dB.
Why Sennheiser - IE 600 wins
- ▲Impedance — 14.00 Ω less. 18 vs 32.
Spec comparison
Drivers
| Spec | Moondrop - Aria 2 | Sennheiser - IE 600 |
|---|---|---|
| Driver count | 1 | 1 |
| Driver types | Dynamic | Dynamic (TrueResponse) |
| Impedanceⓘ | 32 Ω | 18 Ωlead |
| Sensitivityⓘ | 122 dBlead | 118 dB |
Build
| Spec | Moondrop - Aria 2 | Sennheiser - IE 600 |
|---|---|---|
| Detachable cable | true | true |
| Connector | 0.78mm 2-pinlead | MMCX |
Frequently asked
Spec-level deep dives
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