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Etymotic Research Inc ER4SR
Studio Reference In-Ear Headphones


Etymotic Research—inventors of noise-isolating in-ear earphones—present the ER4SR ( S tudio R eference), part of the ER4® reference earphone series.
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Etymotic Research Inc ER4SR
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Etymotic Research—inventors of noise-isolating in-ear earphones—present the ER4SR (Studio Reference), part of the ER4® reference earphone series. Developed for auditory research and hearing testing, they use balanced–armature receivers, establishing them as the gold standard for high-definition, in-ear earphones, and were the first high-fidelity, noise isolating, in-ear earphones to offer this technology in a consumer platform, so are recognized as the world leader for signal response accuracy by which all other earphones are measured. Made for those who demand nothing less than the highest fidelity, these are reference-standard high-fidelity earphones; the next generation of Etymotic's long-revered flagship earphone, the ER4S. They deliver increased accuracy with greater sound output, or sensitivity, and like their predecessor, their channels are matched within an industry-leading 1dB across frequencies from 100Hz to 10 kHz. They also incorporate significant cosmetic and functional improvements, from a sleek, anodized, and laser-etched aluminum body to the reinforced, user-replaceable detachable cable. Totally a must-have for discerning engineers, audiophiles, and consumers who want the most accurate in-ear earphone available.

NOTE: An industry exclusive channel-matching compliance graph, signed by the Etymotic engineer who precision-matched and custom-tuned the balanced-armature drivers, is included with every pair of ER•4 earphones.

Etymotic Research Inc ER4SR Includes:

  • ER4SR earphones
  • Detachable, 5ft cord with 3.5mm gold-plated stereo plug
  • ÂĽ" stereo phone adapter
  • Assortment of eartips
  • Filter removal tool and replacement filters
  • Shirt clip
  • Zippered storage case
  • Performance certificate

Etymotic Research Inc ER4SR Features:

  • 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
  • Professional quality and reliability
  • An assortment of noise-isolating eartip options to ensure proper seal and comfort
  • CUSTOM•FIT option available (contact your Sales Pro for more details)
  • 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
  • 2-year replacement warranty
  • User-replaceable filters protect the balanced-armature drivers from ear wax

Etymotic Research Inc ER4SR Specifications:

  • 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: 5ft, detachable
  • User Replaceable ACCU-Filters: Yes
  • Warranty: 2 Years
  • Custom-Fit Option: Yes (contact your Sales Pro for more information)
5-Pairs of Standard Frost 3-Flange Eartips
Etymotic Research Inc ER38-15SM 5-Pairs of Standard Frost 3-Flange Eartips
Etymotic Research's ER38-15SM is a Package of 10 Eartips (5 pair) that are designed for use with the following systems:  ER•4 hf2 hf3 hf5 mc3 mc2 mc5 HD5 Safety ETY•Kids Music•PRO MP-9•15 HD•15 GSP•1 ...
12.75 14.00 9

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