Etymotic MicroPro ER4S

ER4S Noise-Attenuating Portable Stereo Earphones

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Brand: Etymotic MicroPro
SKU: ER4S






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Etymotic MicroPro ER4S

Etymotic MicroPro ER4S Noise-Attenuating Portable Stereo Earphones
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SKU: ER4S
Condition: Brand New Factory Sealed With 1 Year USA Warranty
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The Etymotic Research ER-4S stereo earphones feature an ultra-lightweight design, up to 42dB of external noise attenuation, and an enhanced output level for both the high and low frequency range, a combination that ensures clear, natural listening enjoyment at safe and moderate playback levels. These earphones have the most accurate frequency response for monitoring musical material, and are recommended for home stereo and computer use, while also satisfying the requirements of most portable devices.

Etymotic MicroPro ER4S Description:

The Etymotic Research ER-4S stereo earphones feature an ultra-lightweight design, up to 42dB of external noise attenuation, and an enhanced output level for both the high and low frequency range, a combination that ensures clear, natural listening enjoyment at safe and moderate playback levels. These earphones have the most accurate frequency response for monitoring musical material, and are recommended for home stereo and computer use, while also satisfying the requirements of most portable devices.

Etymotic MicroPro ER4S Features:

Ultra-lightweight audiophile-quality earphones for portable audio listening with transparent, reference-quality sound
Custom removable filters shape frequency response, protect earphones from earwax
Foam and plastic flange eartips provide comfortable fit and maximum sound isolation
Recommended for use with all portable players including Minidisc, CD, DVD and MP3
High sensitivity with enhanced bass and high frequency output, no additional amplifier required
High external noise exclusion ensures monitoring at safe, moderate listening levels
Accurate, real-ear response

Etymotic MicroPro ER4S Specifications:


Type Balanced Armature Stereo Earphones
Frequency Range 50Hz - 10kHz, 2dB
20Hz - 16kHz, 4dB
Impedance 100 Ohms
Sensitivity 108dB/mW
Maximum Input Power 3.0 Vrms (Continuous)
Connectors 3.5mm Stereo Mini Plug with 1/4" Adapter
Cable Length 5' (1.5m)
Weight 1 oz (28g)

Box Contents


  • 5' Cable
  • 1/4" Stereo Phone Adapter
  • 6 x 3-Flange Eartips
  • 10 x Foam Eartips
  • Filter Changing Tool
  • 4 x Replacement Filters
  • Shirt Clip
  • Carrying Pouch
  • Storage Box

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