Designed for use with the Westone's DefendEar® Concert (Style 49) Musicians' Earplugs. Etymotic filters feature a flat frequency response that allows musicians to hear their performance accurately while providing hearing protection. The ER-9 provides flat 9 dB sound reduction through 2 kHz and slopes down to 15 dB at approximately 8 kHz.
Fits: Westone’s DefendEar Concert (ES49)
Note: If necessary, customers have 2 weeks from the date of invoice to evaluate the attenuation filters. A RMA number will be required to return or exchange the filters; the filters must be returned within 30 days (includes the 2 week evaluation period). The RMA number can be obtained by filling out the returns form here.