New Etymotic ER4XR Extended Response Maximum Sound Experience In-Ear Earphones

Description

From the manufacturer
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Etymotic Research, Inc. is an engineering-driven research, development and manufacturing company. The name 'Etymotic' (pronounced 'et-im-oh-tik') means 'true to the ear'. Innovation, education and hearing conservation are central to Etymotic's mission.
ER4XR Extended Response
The World's Most Accurate Earphones Just Got Better!
Over 30 years ago, Etymotic invented noise-isolating, in-ear earphones. Etymotic's original design, developed for auditory research and hearing testing, used balanced-armature receivers and established these speakers as the gold standard for high-definition, in-ear earphones.
Detachable 5 foot cable
High performance balanced-armature drivers
Sleek driver bodies with anodized finish
Braided cables for reduced microphonic effect
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.
Specifications
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
Assembled and precision matched in the United States
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User Detachable Cables
To detach the cables, pull the cable connector away from the earphone body. Pull straight out-Do Not Twist.
To attach the cables, align the key tab on the cable connector with the notch in the body of the earphone. Press together until it snaps in place.
Changing the Filters
Etymotic earphones have special filters that smooth the frequency response and prevent earwax from entering the earphones. The filters are located at the end of the earphone and are visible when the eartip is removed. When a filter becomes clogged it should be replaced. Filters should be changed when output decreases or sound quality declines.
In The Box
ER4XR Extended Response earphones.
Assorted eartips and 1/4" stereo phone adapter.
Filter removal tool and replacement filters.
Shirt Clip and Carrying Case.
Performance Certificate.