Between the Cadenza 12 and IE 900, the Cadenza 12 comes out ahead in driver count, while the IE 900 wins on sensitivity. Overall, the Cadenza 12 scores 70.1 and the IE 900 scores 66.4 on our Mars Score.
Which should you buy?
The Cadenza 12 edges ahead on the Mars Score (70.1 vs 66.4), but the 3.7-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the Cadenza 12 if you care most about driver count. The biggest gaps in its favor are driver count.
Pick the IE 900 if you care most about sensitivity. Its strongest claims are sensitivity.
Both ship with comparable impedance, 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 Letshuoer - Cadenza 12 wins
- ▲Driver count — 11.00 more. 12 vs 1.
Why Sennheiser - IE 900 wins
- ▲Sensitivity — 17.14% more. 123 dB vs 105 dB.
Spec comparison
Drivers
| Spec | Letshuoer - Cadenza 12 | Sennheiser - IE 900 |
|---|---|---|
| Driver count | 12lead | 1 |
| Driver types | 1DD + 8BA + 2EST + 1BC Tetrabrid | Dynamic (X3R) |
| Impedanceⓘ | 16 Ω | 16 Ω |
| Sensitivityⓘ | 105 dB | 123 dBlead |
Build
| Spec | Letshuoer - Cadenza 12 | Sennheiser - IE 900 |
|---|---|---|
| Detachable cable | true | true |
| Connector | 0.78mm 2-pinlead | MMCX |
Spec-level deep dives
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