Between the Svanar and IER-M9, the Svanar comes out ahead in sensitivity, while the IER-M9 wins on impedance and driver count. Overall, the Svanar scores 50.3 and the IER-M9 scores 54.5 on our Mars Score.
Which should you buy?
The IER-M9 edges ahead on the Mars Score (50.3 vs 54.5), but the 4.2-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Svanar if you care most about sensitivity. The biggest gaps in its favor are sensitivity.
Pick the IER-M9 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: 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 Hifiman - Svanar wins
- ▲Sensitivity — 3.88% more. 107 dB vs 103 dB.
Why Sony - IER-M9 wins
- ▲Impedance — 42.00 Ω less. 18 vs 60.
- ▲Driver count — 4.00 more. 5 vs 1.
Spec comparison
Drivers
| Spec | Hifiman - Svanar | Sony - IER-M9 |
|---|---|---|
| Driver count | 1 | 5lead |
| Driver types | Dynamic (Topology Diaphragm) | 5 Balanced Armature |
| Impedanceⓘ | 60 Ω | 18 Ωlead |
| Sensitivityⓘ | 107 dBlead | 103 dB |
Build
| Spec | Hifiman - Svanar | Sony - IER-M9 |
|---|---|---|
| Detachable cable | true | true |
| Connector | 0.78mm 2-pinlead | MMCX |
Frequently asked
Spec-level deep dives
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