Etymotic ER4XR Extended Response
Etymotic pioneered the "In-Ear Monitor" design when the world was still on earbuds, and till date commands respect for their work with the ER4XR. It's the litmus test of neutrality and authentic tone, trusted by studio professionals, with the ER4SR its partner in correctness.
The Extended Response hits deep in bass, and reaches treble notes effortlessly to deliver the fun in any composition. A reactive pair that gets your feet tapping and noticing notes you never knew was in your favourite track. Innerfidelity have given due page space to the latest evolution of the word 'reference' from Etymotic here.