Etymotic Research ER4SR Reference Earphones Sennheiser 18W x 2 (RMS) total

18W x 2 (RMS) total output power

the Sundara is priced as an entry-level music lover's headphone

The EQ facility

This helps to improve sound isolation and comfort

We've used high-purity OFC silver coated cables that provide a wide sound stage

Etymotic Research ER4SR Reference Earphones Sennheiser 18W x 2 (RMS) totalOverview ER4SR is the highest performing single driver in ear monitor. The IEM shells are made of anodized aluminum, CNC machined with extremely tight tolerances. Using a single Balanced Armature (BA) driver allows for extremely accurate IEM without the added complexity of crossovers, and helps keep the aluminum body small and slim. The included high quality user replaceable cable is reinforced and twisted, to improve longevity and durability.