In-Ear Monitors
Etymotic ER4XR
Etymotic
The Etymotic ER4XR is a single balanced-armature in-ear monitor housed in a CNC-machined anodized aluminum body with a detachable, user-replaceable cable using a customized MMCX connector. It is the bass-tuned variant of Etymotic's ER4 series, sharing the same driver type as the flat-tuned ER4SR but with added low-frequency output, and each pair ships with a channel-matching compliance certificate.
Specifications
| Frequency response | 20 Hz – 16 kHz |
| Sensitivity | 98 dB @ 1kHz, 1mW |
| Impedance | 45 Ω |
As stated by the manufacturer — not community data.
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