ER4-XR

Description

In a Class by Itself

Etymotic invented noise-isolating, in-ear earphones. The ER4 MicroPro series earphones were the first earphones commercialized using balanced armature technology and are recognized as the world leader in response accuracy, to which all other earphones are compared. After more than 20 years, these reference-quality earphones are still the choice of serious sound engineers, audiophiles and musicians.

Backed by decades of research and development for the ear

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
• Highest output sensitivity in its class

Features

• Professional quality and reliability
• Precision-matched, custom-tuned drivers
• Precision machined metal bodies with anodized finish
• Detachable, reinforced 5 ft. cable with 3.5mm gold plated stereo plug and MMCX connectors
• Assortment of noise-isolating eartip options to ensure proper seal and comfort

Highest noise isolation

• First earphones to completely seal the ear
• 98% (35 dB – 42 dB) noise isolation —highest of any earphones or headsets on the market today
• Reduction of outside noise reduces the risk of listening at unsafe levels

Best durability and warranty

• 2-year replacement warranty
• User-replaceable filters protect the balanced-armature drivers from ear wax

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

 

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 exceptional sound quality with just the right amount of low-end enhancement.

Accurate Earphone Reproduction

For earphones to have 100% accuracy, a recording of a live performance must produce exactly the same sound at the eardrum as the original performance. To achieve this, the acoustic properties of the ear must be factored in. The acoustic resonance and horn effects of the ear change a flat audio signal entering the open ear into sound with a (2700 Hz) high-frequency boost, which is the same response heard at the eardrum in a typical ear.

Technical Specs