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Etymotic ER4-SR is the new reference standard hi-fidelity earphone for those who demand nothing less than the highest fidelity. This next generation ER4-SR delivers increased accuracy with greater sound output. Like its predecessor, the ER4-SR channels are matched within an industry-leading 1dB across frequencies from 100Hz to 10 kHz.
ER4-SR incorporates significant cosmetic and functional improvements, from a sleek, anodized and laser-etched aluminium body to the reinforced, user-replaceable detachable cable. The ER4SR is a must have for discerning engineers, audiophiles and consumers wanting the most accurate in-ear earphone available.
Etymotic invented noise-isolating, in-ear earphones. Etymotic's original insert earphone design, developed for auditory research and medical diagnostics used balanced armature receivers and established these speakers as the gold standard for high-definition, in-ear earphones.
Decades of research and development.
Etymotic ER4 series earphones were the first earphones commercialised using balanced armature driver technology and are recognized as the world leader in response accuracy, to which all other earphones are compared. The ER4SR is the most accurate in-ear earphone on the market delivering a flat response across all frequencies.
Included with every pair of ER4 earphones is an industry-exclusive channel-matching compliance graph, signed by the Etymotic engineer who precision matched and custom tuned the balanced-armature drivers.
Providing the highest noise isolation of any earphones or headphones on the market today, Etymotic ER4-SR include an assortment of noise-isolating eartips options to ensure proper seal and comfort.
The user-replaceable acoustic dampers are not only a part of the driver housing, it also protects the balanced armature driver from ear wax. Etymotic also includes a 2-year warranty.
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