Etymotic Research ER4 XR

The ER4XR, or 'Extended Response' model, is specifically tuned to provide a slight boost in the lower frequencies. While it maintains the signature accuracy and detail of the Etymotic line, it offers a warmer, more engaging sound profile compared to the strictly neutral ER4SR.

These earphones are industry leaders in passive isolation, blocking out between 35 and 42 dB of ambient noise. Because they rely on a deep-insertion fit rather than active electronic cancellation, they are exceptionally effective at silencing consistent background sounds like airplane engines or office chatter.

Yes, the ER4XR features a detachable cable design. This allows you to easily replace the cable if it becomes damaged or if you wish to switch between the included Bluetooth connectivity and a wired connection.

With an impedance of 45 ohms and a sensitivity of 98 dB, the ER4XR can be driven by most smartphones and laptops without needing a dedicated external amplifier. However, using a high-quality DAC or amplifier can help you extract the maximum level of detail and clarity from high-resolution audio files.

The deep-insertion design is necessary to achieve Etymotic's signature sound and isolation, but it can feel intrusive to those unaccustomed to it. Most users find that once they select the correct ear tip size, the lightweight aluminum housings become comfortable enough for extended wear.