Etymotic Research ER-4S

The ER-4S earphones, part of the Etymotic Research MicroPro series, are among the world leaders for frequency response accuracy at 92%. As such, these earphones are frequently used by professional musicians as in-ear monitors. They offer 98% noise isolation when properly inserted and a braided cable to reduces microphonic effects.

  • Status: Available
  • Availability date: 2002

Basic Specs

Alias ER4S
Design In-ear
Physical attachment Clip-on
Connection type Wired (3.5mm)

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Tech Specs

Also Known As...
Alias ER4S
Hardware
Color Black
Design In-ear
Physical attachment Clip-on
Connection type Wired (3.5mm)
Wire length 60.0 inches
Audio
Drivers per ear 1
Impedance 100 Ω
Frequency response (low) 20 Hz
Frequency response (high) 16000 Hz
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