Between the Andromeda MW10 and IER-M9, the Andromeda MW10 comes out ahead in sensitivity and impedance, while the IER-M9 wins on several specs. Overall, the Andromeda MW10 scores 66.4 and the IER-M9 scores 54.5 on our Mars Score.
Which should you buy?
The Andromeda MW10 is the clear pick on raw spec strength, leading by 11.9 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the Andromeda MW10 if you care most about sensitivity and impedance. The biggest gaps in its favor are sensitivity, impedance.
The IER-M9 similarly doesn't carry a headline advantage on the popular specs — look at the full table for category-specific deltas.
Both ship with comparable driver count, detachable cable, so those specs don't separate the two — focus on the differences below.
Bottom line: the Andromeda MW10 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why Campfire Audio - Andromeda MW10 wins
- ▲Sensitivity — 11.65% more. 115 dB vs 103 dB.
- ▲Impedance — 6.00 Ω less. 12 vs 18.
Why Sony - IER-M9 wins
- No decisive advantages.
Spec comparison
Drivers
| Spec | Campfire Audio - Andromeda MW10 | Sony - IER-M9 |
|---|---|---|
| Driver count | 5 | 5 |
| Driver types | 5 Balanced Armature | 5 Balanced Armature |
| Impedanceⓘ | 12 Ωlead | 18 Ω |
| Sensitivityⓘ | 115 dBlead | 103 dB |
Build
| Spec | Campfire Audio - Andromeda MW10 | Sony - IER-M9 |
|---|---|---|
| Detachable cable | true | true |
| Connector | MMCX | MMCX |
Frequently asked
Spec-level deep dives
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