Sennheiser IE 900

The Sennheiser IE 900 is a wired in-ear monitor with a one-piece CNC-milled aluminum housing and a single 7 mm dynamic TrueResponse (XWB) transducer paired with the X3R triple-resonator chamber technology. It uses MMCX connectors and ships with interchangeable 2.5 mm, 3.5 mm, and 4.4 mm para-aramid-reinforced cables, sitting at the top of Sennheiser's IE series alongside the IE 200 and IE 600.
| Frequency response | 5 Hz – 48 kHz |
| Sensitivity | 123 dB |
| Impedance | 16 Ω |
| THD | 0.05% |
| Driver | 7 mm |
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