Etymotic Research ER-9 Single Filter for Musicians' Earplugs (Clear)

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.