Etymotic ER4SR Review: Ranked #138 of 148

Last updated: October 10, 2026

The Etymotic ER4SR ranks #138 out of 148 total In-Ear Headphones for sound quality. See all Headphones rankings for every top pick.

Brand: Etymotic

Prices on this page were last checked October 10, 2026 at 5:37 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

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#138 Etymotic ER4SR: $299.99 B&H Photo Video eBay

Pros: For listeners who prefer a flat, studio style sound, the midrange from 200 Hz to 3 kHz stays within about 1 dB of target and its largest upper range peak is only 1.6 dB, so vocals come through clear without any glare. It is rated level with the Audio-Technica ATH-E70 and Mackie MP-360, which cost more.

Cons: Sub-bass sits about 11 dB below target and falls 6 dB short at 75 Hz, so bass heavy music sounds lean and lacks impact. Treble about 6 dB low from 6 to 10 kHz and a 9 dB dip near 11.7 kHz take away air and shimmer. Its 98 dB/mW sensitivity is on the low side for an in ear, so it needs more volume than most.

Released2016 (10 years ago)
BackClosed
Built-in MicrophoneNo
ConnectionWired
Deviation From Target4.26 dB standard deviation
Driver TypeBalanced armature
Drivers1 x balanced armature
Form FactorIn-ear
Frequency Response20Hz - 16kHz (Manufacturer specified)
Harman Preference Score45 (measured by oratory1990, via AutoEQ)
Impedance45 ohms
Sensitivity98 dB/mW
Sub-bass ExtensionFalls 6 dB below target at 75 Hz (-10.6 dB at 30 Hz)
Tonal Tilt+1.38 (negative is warmer, positive brighter)
EQ preset to match the Harman target

Set a preamp of -6.0 dB, then add these filters in any parametric equalizer (Wavelet, Equalizer APO, Peace, or a player with parametric EQ). Calculated by AutoEQ from its measured frequency response.

FilterFrequencyGainQ
Low shelf105 Hz+6.0 dB0.70
Peak2,470 Hz-3.7 dB0.94
Peak7,389 Hz+6.4 dB1.15
Peak77 Hz+1.2 dB2.20
Peak1,450 Hz-1.8 dB2.27
High shelf10,000 Hz+2.5 dB0.70
Peak269 Hz-0.5 dB1.17
Peak745 Hz+0.5 dB2.09
Peak7,552 Hz-0.8 dB4.20
Peak9,634 Hz-1.0 dB5.99

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