The ES5 is the “elite series” in-ear monitor and designed for a pure sound, with five armature drivers and a passive three-way crossover for the on-stage musician. The crossover splits the audio signal into separate frequency bands that can be separately routed to each micro driver. Each driver is optimized for a particular frequency range to give a balanced, dynamic sound - the ES5 has 1 bass, 2 mid-range and 2 high frequency drivers. The ES5 features a proprietary flex-canal body for extra comfort, and also over-the-ear cable design. Ear impressions are needed as it’s custom product.