The ER3XR Extended Response offers a modest bass boost, building on the sound quality of the ER3SE, while providing a slight bass boost for those listeners that prefer a stronger low end response.
Etymotic designs products to measure, improve and protect hearing, and enhance the listening experience of music lovers everywhere. Audio engineers, musicians and audiologists at Etymotic have generated over 100 patents issued and pending. Utilizing the balanced armature drivers regarded as the gold standard for high definition, in-ear earphones, the ER3XR is for those who demand nothing less than the highest fidelity. ER3 series earphones are tuned to extremely tight tolerance specs for the most accurate sound reproduction on the market.