Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | Letshuoer - Cadenza 12 | Sennheiser - IE 900 |
|---|---|---|
| Sensitivity | 105 dB | 123 dB |
| Driver count | 12 | 1 |
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. The single most decisive one: Driver count — 11.00 more. 12 vs 1.
Pick the IE 900 if you care most about sensitivity. Its strongest claims are sensitivity. The single most decisive one: Sensitivity — 17.14% more. 123 dB vs 105 dB.
Both ship with comparable impedance, detachable cable, so those specs do not 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 says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: Letshuoer - Cadenza 12 or Sennheiser - IE 900?
Letshuoer - Cadenza 12 leads the current Mars Score by 3.7 points.The more useful decision is the trade-off behind that result: compare driver count, sensitivity against the way you will actually use the product.
Choose Letshuoer - Cadenza 12 if…
Letshuoer - Cadenza 12 has the measurable edge on driver count.
Choose Sennheiser - IE 900 if…
Sennheiser - IE 900 has the measurable edge on sensitivity db.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
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 |