Etymotic Research ER-9 Single Filter for Musicians' Earplugs (Clear)
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Etymotic Research ER-9 Single Filter for Musicians' Earplugs (Clear)
Fits: Westone’s DefendEar Concert (ES49)
One replacement Etymotic Filter for the Style 49 Custom Filtered Ear Plugs. Etymotic filters feature a flat frequency response that allows musicians to hear their performance accurately while providing hearing protection. Provides a uniform flat 9dB of sound reduction from 125 Hz through 8 kHz.