Etymotic Research ER4XR Extended Range Earphones Black

Precision In-Ear Reference Earphones

The Etymotic Research ER4XR Extended Range Earphones are balanced-armature in-ear monitors built for music lovers and hi-fi enthusiasts who demand uncompromising midrange and high-frequency accuracy. They feature precision-machined, anodized, laser-etched aluminium bodies and user-replaceable detachable cables with a 3.000 cord length.

Suited For Critical Listening Not Bass-Heavy Genres

These earphones suit sound engineers, audiophiles and musicians who need stringent channel matching and a reference-standard frequency response of 20 Hz - 16 kHz with a measured low-end enhancement. Buyers seeking emphasised sub-bass impact or wireless convenience should look at alternative designs.

Consistent Accuracy During Extended Sessions

The balanced-armature drivers maintain their tight channel matching and tonal balance over long listening periods without the thermal compression that can affect dynamic drivers. Passive noise isolation remains constant because the deep-fit ear coupling does not rely on active circuitry that can degrade with heat.