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Etymotic Research

Etymotic Research ER4SR Studio Reference Earphones

SKU #L68743000000000
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Overview

High fidelity, high accuracy technology creates the best audio experience.

Over 30 years ago, Etymotic invented noise-isolating, in-ear earphones. Etymotic’s original design, developed for auditory research and hearing testing, used balanced armature receivers and established these speakers as the gold standard for high-definition, in-ear earphones. ER4 earphones were the first high-fidelity, noise isolating in-ear earphones to use this technology in a consumer earphone, and are recognized as the world leader for response accuracy to which all other earphones are compared.

The ER4SR modal delivers sound accuracy with greater output for a high fidelity experience.

For in-ear earphones that are best in class, order today.

Specs

ER4SR Studio Reference Earphones Specifications:

  • Frequency Response: 20 Hz - 16 kHz
  • Transducers: High performance, balanced armature micro-drivers
  • Noise Isolation: 35-42 dB
  • Impedance (@1kHz): 4XR (45 Ohms) 4SR (45 Ohms)
  • Sensitivity (@1 kHz) SPL at 0.1v: 4XR (98 dB) 4SR (98 dB)
  • Maximum Output (SPL): 122 dB
  • Cable: 5 ft Detachable
  • User Replaceable ACCU-Filters: Yes
  • Warranty: 2 Year Manufacturer's
  • Custom-Fit Option: Yes
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