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The ER-4PT is the newest product in Etymotic Research's MicroPro series. With included travel adapters, these earbuds are tailored for the sound professional or audiophile who travels frequently. Otherwise, the ER-4PT shares the same hand-selected drivers and tonal features of the ER-4P.


  • Status: Available
  • Availability date: Nov. 22, 2010
  • Price at launch: $299.00


  • Alias: ER4PT

Also Known As...

  • Color: Black
  • Design: In-ear
  • Physical attachment: Clip-on
  • Connection type: Wired (3.5mm)
  • Wire length: 60.0 inches


  • Drivers per ear: 1
  • Impedance : 27 Ω
  • Frequency response (low): 20 Hz
  • Frequency response (high): 16000 Hz


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