Etymotic ER2 SE/XR Noise-Isolating Earphones (Open Box) 4.4mm male Specially designed low-noise relay switches

Specially designed low-noise relay switches offer excellent dynamics that emphasize the spaciousness and vibrancy of the sound

LCP has both high rigidity and lightweight characteristic and is widely used in artificial satellites and jet engines

Featuring the magnesium housing and grill design of the LCDi4

Controls on the front of the microphone allow you to easily adjust headphone volume

Etymotic ER2 SE/XR Noise-Isolating Earphones (Open Box) 4.4mm male Specially designed low-noise relay switchesWhich ER2 is right for you? Both ER2 models, the ER2SE and ER2XR, use the same low impedance dynamic drivers. That means they are easy to drive, and no amplifier is required. The only difference between the 2 models is the tuning of the lower (bass) frequencies. The Studio Edition ER2SE is tuned to have a flat frequency response. The eXtended Response ER2XR is tuned to have an emphasized bass, adding 1 2dB to the mid bass and 3 4dB to the sub bass.