The ER 9, 15 and 25 filters have been developed for musicians. They absorb sound across all frequencies without significant tone change. The filters satisfy the S-V-W and E descriptions (see page 17).
ER is also ideal for pilots and persons who regularly attend concerts or clubs.
- Choice of 3 filters.
- Filters have linear attenuation.
- True sound is perceived.
- Very good communication clarity
- Perfect for Musicians
- Compatible with in-ear monitoring and mobile phone headsets.
- Recommended period of usage: 5 years
- Made in Germany
- Unique, laser etched serial numbers.