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ER•4 MicroPro™ Earphones
Next Best Thing to Live Music
  • ER•4 system includesTransparent, reference-quality sound
  • For audiophiles, performing musicians and recording engineers
  • For mixing, monitoring and critical listening
  • Accurate real-ear response
  • Unsurpassed isolation from outside sound
The ER•4 MicroPro™ earphones are the next best thing to live music, with noise isolation far surpassing that of active noise-canceling earphones. The ER•4s require NO batteries, and can be plugged into any audio source. Their external noise exclusion -- 35 dB with 3-flange eartips, 42 dB with foam eartips -- allows you to hear the full dynamic range of recordings without having to play them at unnaturally high and unsafe levels. The earphones come in three styles: ER•4B, ER•4S, ER•4P.

System Includes

  • ER•4 MicroPro earphones
  • 5 ft. cord with 3.5 mm stereo phone plug
  • 1/4" stereo phone adapter plug
  • 4 triple-flange eartips (standard size)
  • 2 triple-flange eartips (small)
  • 4 foam eartips
  • 4 glider eartips
  • Filter changing tool
  • 4 replacement filters
  • Shirt clip
  • Pouch
  • Storage box
ER•4 MicroPro is a trademark of Etymotic Research, Inc. The ER•4 MicroPro Earphones are covered by one or more of the following U.S. patents: #4,677,679, #4,763,753, #5,887,070, RE38351 and other patents pending.
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