Etymotic ER4S Earphones



ER•4S earphones were designed to compensate for the high frequency emphasis in all CD recordings, in order to provide accurate sound reproduction. Performing musicians often use them as in-ear monitors because the response of the ER•4S matches the response of most typical monitor loudspeakers. The high accuracy and exceptional sound isolation of the ER•4S have made these earphones popular with musicians, recording engineers and audiophiles. ER•4S earphones can be used with a headphone amplifier when using low power portable devices.

To get CUSTOM FIT earmoulds made for your earphones/ noise protection, please use one of the partners or outlets listed at our sister site PerfectFit Ears

Can't decide between the ER•4PT and the ER•4S? You have both with the adapter included with the ER•4PT.

Availability: In stock (6)

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. ER•4PT earphones, intended for sound engineers and audiophiles in constant motion, comes equipped with extra accessories and adapters.

Frequency Response 20 Hz - 16 kHz
Accuracy Score 4B (92%) 4S (92%) 4PT (86%)
Transducers balanced armature
Noise Isolation 35-42 dB
Impedance (@1kHz) 4B (100 Ohms) 4S (100 Ohms) 4PT (27 Ohms)
Sensitivity (@1 kHz) SPL at 0.1v 4B (90 dB) 4S (90 dB) 4PT (102 dB)
Maximum Output (SPL) 122 dB
Cable 1.5m
User Replaceable ACCU-Filters Yes
Warranty 2 years
Custom-Fit Option Yes (see below)

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