Etymotic ER4® SR Studio Reference Earphones

Quick Overview

ER4SR is Etymotic’s new reference standard hi-fidelity earphone, for those who demand nothing less than the highest fidelity. The next generation of Etymotic's long revered flagship earphone, the ER4S, the ER4SR delivers increased accuracy with greater sound output, or sensitivity. Like its predecessor, the ER4SR channels are matched within an ..

Additional Information

  • Model: ETYMOTIC_ETY-ER4SR
  • Manufactured by: Etymotic Research
$549.00
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ER4SR is Etymotic’s new reference standard hi-fidelity earphone, for those who demand nothing less than the highest fidelity. The next generation of Etymotic's long revered flagship earphone, the ER4S, the ER4SR delivers increased accuracy with greater sound output, or sensitivity. Like its predecessor, the ER4SR channels are matched within an industry-leading 1dB across frequencies from 100Hz to 10 kHz. The new ER4SR incorporates significant cosmetic and functional improvements, from a sleek, anodized and laser-etched aluminum body to the reinforced, user-replaceable detachable cable.

The ER4SR is a must have for discerning engineers, audiophiles, and consumers wanting the most accurate in-ear earphone available.

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.

After more than 20 years, these reference-quality earphones are still the choice of serious sound engineers, audiophiles and musicians.

Backed by decades of research and development for the ear

World leader in sound reproduction

  • Unsurpassed frequency response accuracy and sound quality — 92%+ response accuracy from 20 Hz – 16 kHz
  • The only earphones with balanced-armature, precision-matched, custom-tuned drivers
  • Highest output sensitivity in its class
Timeless style and fit
  • Professional quality and reliability
  • An assortment of noise-isolating eartip options to ensure proper seal and comfort
Highest noise isolation
  • First earphones to completely seal the ear
  • 98% (35 dB - 42 dB) noise isolation —highest of any earphones or headsets on the market today
  • Reduction of outside noise reduces the risk of listening at unsafe levels
Best durability and warranty
  • 2-year replacement warranty
  • User-replaceable filters protect the balanced-armature drivers from ear wax
What’s In the Box?
  • Earphones
  • Detachable, 5 ft. cord with 3.5mm gold plated stereo plug
  • 1/4” stereo phone adaptor
  • Assortment of eartips
  • Filter removal tool and replacement filters
  • Shirt clip
  • Zippered storage case
  • Performance certificate
Accurate Earphone Reproduction

For earphones to have 100% accuracy, a recording of a live performance must produce exactly the same sound at the eardrum as the original performance. To achieve this, the acoustic properties of the ear must be factored in. The acoustic resonance and horn effects of the ear change a flat audio signal entering the open ear into sound with a (2700 Hz) high-frequency boost, which is the same response heard at the eardrum in a typical ear.

ER4 Comparison Chart

Technical Specs

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

Download the ER4SR Data Sheet HERE