Bass Boost

BASS BOOST EARPHONES

ER2XR

ER2XR

Dynamic Driver

ER3XR

ER3XR

Balanced Armature

ER4XR

ER4XR

Balanced Armature

The “extended bass” models share the same drivers as their “reference” counterparts, with a modest bass boost. That makes the IEMs sound a little warmer, while reproducing the rest of the sound frequencies precisely as recorded.