Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | FiiO - FH19 | Sennheiser - IE 900 |
|---|---|---|
| Sensitivity | 112 dB | 123 dB |
| Driver count | 10 | 1 |
| Impedance | 12 Ω | 16 Ω |
Between the FH19 and IE 900, the FH19 comes out ahead in driver count / impedance, while the IE 900 wins on sensitivity. Overall, the FH19 scores 72.9 and the IE 900 scores 66.4 on our Mars Score.
Which should you buy?
The FH19 edges ahead on the Mars Score (72.9 vs 66.4), but the 6.5-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the FH19 if you care most about driver count / impedance. The biggest gaps in its favor are driver count, impedance. The single most decisive one: Driver count — 9.00 more. 10 vs 1.
Pick the IE 900 if you care most about sensitivity. Its strongest claims are sensitivity. The single most decisive one: Sensitivity — 9.82% more. 123 dB vs 112 dB.
Both ship with comparable detachable cable, so those specs do not separate the two — focus on the differences below.
Bottom line: the FH19 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Which should you buy: FiiO - FH19 or Sennheiser - IE 900?
FiiO - FH19 leads the current Mars Score by 6.5 points.The more useful decision is the trade-off behind that result: compare driver count, impedance, sensitivity against the way you will actually use the product.
Choose FiiO - FH19 if…
FiiO - FH19 has the measurable edge on driver count, impedance ohm.
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 FiiO - FH19 wins
- ▲Driver count — 9.00 more. 10 vs 1.
- ▲Impedance — 4.00 Ω less. 12 vs 16.
Why Sennheiser - IE 900 wins
- ▲Sensitivity — 9.82% more. 123 dB vs 112 dB.
Spec comparison
Drivers
| Spec | FiiO - FH19 | Sennheiser - IE 900 |
|---|---|---|
| Driver count | 10lead | 1 |
| Driver types | 1DD + 8BA + 1BC Hybrid | Dynamic (X3R) |
| Impedanceⓘ | 12 Ωlead | 16 Ω |
| Sensitivityⓘ | 112 dB | 123 dBlead |
Build
| Spec | FiiO - FH19 | Sennheiser - IE 900 |
|---|---|---|
| Detachable cable | true | true |
| Connector | MMCX | MMCX |