'Extended Response'

(Etymotic invented noise-isolating, in-ear earphones over 20 years ago. Etymotic’s original design, developed for auditory research and hearing testing,used balanced –armature drivers. The ER4 MicroPro series earphones were the first earphones commercialized using the balanced armature technology in a consumer earphone.)

Every pair of ER•4 earphones is an industry-exclusive channel-matching compliance graph, signed by the Etymotic engineer who precision matched and custom tuned the balanced-armature drivers.

ER4XR is the earphone for music lovers and hi-fi enthusiasts who want uncompromising accuracy in the midrange and high frequencies, but appreciate a bit of extra presence in the lower end. Like the ER4SR, the ER4XR is built with precision machined, anodized and laser-etched aluminum bodies and features user-replaceable detachable cables. The ER4XR also incorporates the stringent channel-matching standard used in the ER4SR. The ER4XR is ideal for anyone looking for a neutral-sounding earphone with just the right amount of low-end enhancement.

Review :




Features :

a. Backed by decades of research and development for the ear

b. World leader in sound reproduction

- Unsurpassed frequency response accuracy and sound quality — 92%+ response accuracy from 20 Hz – 16 kHz

- The only earphones with balanced-armature, precision-matched, custom-tuned drivers

c. Timeless style and fit

- Professional quality and reliability

- An assortment of noise-isolating eartips options to ensure proper seal and comfort

- CUSTOM•FIT option available

d. High noise isolation


- 98% (35 dB - 42 dB) noise isolation

- Reduction of outside noise reduces the risk of listening at unsafe levels

e. Best durability and warranty

- 2-year replacement warranty

- User-replaceable filters protect the balanced-armature drivers from ear wax

Specifications :

- Frequency Response : 20 Hz - 16 kHz

- Transducers : High performance, balanced armature micro-drivers

- Noise Isolation : 35-42 dB

- Impedance (@1kHz) : 4XR (45 Ohms), 4SR (45 Ohms)

- Sensitivity (@1 kHz) SPL at 0.1v : 4XR (98 dB) 4SR (98 dB)

- Maximum Output (SPL) : 122 dB

- Cable : 5 ft Detachable

- User Replaceable ACCU-Filters : Yes

- Warranty : 2 Years

- Custom-Fit Option : Yes

Accessories Included :


- 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 (signed by the Etymotic engineer)

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  • Product Code: ER4XR
  • Availability: In Stock
  • Rp.4,600,000

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