Etymotic ER4SR & ER4XR IEMssearch

Etymotic ER4SR & ER4XR IEMs

Etymotic ER4SR & ER4XR IEMs

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From the Leader in Noise-Isolating In-Ear Monitors

A classic IEM that’s been refined over decades, the Etymotic ER4 gets its latest update in the ER4SR and ER4XR: two models that deliver accurate, reference-quality sound with excellent noise isolation—up to 42 dB of reduction, to be exact. Each features precision-matched and custom-tuned balanced armature drivers inside sleek anodized aluminum housings, along with a detachable 5-foot-long cable that ends in a 3.5-millimeter gold-plated stereo plug. Plus, their design completely seals the ear to block out the outside world. Improving upon the ER4S’s tonal accuracy, the ER4SR IEM is ideal for engineers, audiophiles, and discerning music lovers. If you appreciate a bit of extra presence in the lower end, opt for the extended-response ER4XR IEM. To learn more, check out this Headfonics review.

Note: At checkout, you’ll have your choice of model: ER4SR or ER4XR.

Etymotic ER4SR & ER4XR IEMs
Etymotic ER4SR & ER4XR IEMs


  • Etymotic
  • Transducers: Balanced armature micro drivers
  • Frequency response: 20 Hz–16 kHz
  • Noise isolation: 35–42 dB
  • Impedance at 1 kHz: 45 ohms
  • Sensitivity at 1 kHz, SPL at 0.1v: 98 dB
  • Maximum output (SPL): 122 dB
  • Cable: 5 ft (1.5 m), detachable
  • User-replaceable ACCU filters


  • Manufacturer's 2-year warranty
  • Detachable cable with 3.5mm gold-plated stereo plug
  • ¼” stereo phone adapter
  • Assortment of ear tips
  • Filter removal tool and replacement filters
  • Shirt clip
  • Zippered storage case


All orders will be shipped by Massdrop.

Estimated ship date is Dec 17, 2018 PT.

After the drop ends, payment will be collected and the group’s order will be submitted to the vendor up front, making all sales final. Check the discussion page for updates on your order.