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Etymotic Research ER4XR Extended Range In-Ear Monitors

Etymotic Research ER4XR Extended Range In-Ear Monitors

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Product Description

Etymotic Research ER4XR Extended Range In-Ear Monitors

Why Etymotic?

Etymotic designs products to measure, improve and protect hearing, and enhance the listening experience of music lovers everywhere. Audio engineers, musicians and audiologists at Etymotic have generated over 100 patents issued and pending.

Why ER4XR Extended Response?

ER4XR is the earphone for music lovers and hi-fi enthusiasts who want uncompromising accuracy in the mid-range and high frequencies, but appreciate a bit of extra presence in the lower end.

The ER4XR incorporates the stringent channel matching standard used in the ER4SR and is built with precision machined, anodized and laser-etched aluminum bodies, and features user-replaceable detachable cables.

The ER4XR is ideal for anyone looking for exceptional sound quality with just the right amount of low-end enhancement.


  • Frequency response 20Hz-16kHz
  • Channel matched to within 1dB from 100Hz-10kHz
  • 35-42 dB noise isolation
  • Impedance 45 ohms
  • Sensitivity: 98 dB SPL at 1kHz, 0.1V drive level
  • 122 dB maximum output

What’s In the Box?

  • Earphones
  • Detachable, 5 ft. cord with 3.5mm gold plated stereo plug
  • ¼” stereo phone adaptor
  • Assortment of eartips
  • Filter removal tool and replacement filters
  • Shirt clip
  • Zippered storage case
  • Performance certificate

Additional Information

Brands Etymotic
UPC 846430002029