Refined and simplified title: Etymotic ER4SR Studio Reference Earphones

The Etymotic Research ER4SR is the new reference standard in-ear monitor for those who demand nothing less than the highest fidelity. This next generation of the long-revered flagship in-ear earphone, the ER4S, delivers increased accuracy with greater sensitivity. The ER4SR channels are matched to within an industry-leading 1dB across all frequencies from 100Hz to 10kHz, like its predecessor. Sleek, anodized and laser-etched aluminum bodies and braided, reinforced 5 ft. detachable cables are incorporated in the new ER4SR. The ER4SR is a must-have for discerning engineers, audiophiles, and consumers wanting the most accurate in-ear monitor available. Included with every pair of ER4SR earphones is an industry-exclusive channel matching compliance graph signed by the Etymotic engineer who precision matched and custom-tuned the balanced-armature drivers. Every pair of ER4SR earphones is assembled and tuned in the United States.

The ER4SR earphones feature high-performance, balanced-armature micro-drivers that are precision matched to within 1 dB. The sleek, anodized, laser-etched aluminum body provides a durable and visually appealing design. The braided, reinforced 5ft detachable MMCX cables ensure a secure and reliable connection. With 35-42 dB of noise isolation and a maximum output of 122 dB, the ER4SR delivers an immersive listening experience. The precision-machined metal bodies with an anodized finish add to the overall premium quality of the earphones.

In summary, the Etymotic Research ER4SR is the new benchmark for in-ear monitors, offering uncompromising sound quality, exceptional noise isolation, and a sleek, durable design. Whether you're a discerning engineer, an audiophile, or a consumer seeking the most accurate in-ear monitor, the ER4SR is a must-have.

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