Etymotic Research ER4SR Studio Reference Precision Matched In-Ear Earphones (Balanced Armature Drivers Noise Isolating High Fidelity World Leader Response Accuracy)

Etymotic Research ER4SR Studio Reference Precision Matched In-Ear Earphones (Balanced Armature Drivers Noise Isolating High Fidelity World Leader Response Accuracy)

The Etymotic Research ER4SR is the new reference standard in-ear monitor for those who demand nothing less than the highest fidelity. The next generation of our long revered flagship in-ear earphone the ER4S the ER4SR delivers increased accuracy...


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