ESB Audio 3.6K3 CX — 3000 Series 3-Way Passive Crossover (pair) | HF Audio Labs

The Passive Crossover for ESB 3000 Series Three-Way Front Stage Systems

The ESB 3.6K3 CX is the passive crossover network designed for the ESB 3000 Series three-way driver combination — the 3.165 woofer, 3.90 midrange, and 3.28 tweeter.

A properly designed passive crossover allows each driver to operate in the frequency range it was designed for while maintaining smooth transitions and consistent behavior across the full system.

Design

The 3.6K3 CX was designed specifically around the characteristics of the 3000 Series drivers it serves. Crossover points, filter slopes, and component values are matched to those drivers — not adapted from a generic design applied to multiple speaker combinations.

System Application

The 3.6K3 CX is used with the 3.6K3 speaker system and is available as a standalone component for custom three-way builds using 3000 Series drivers.

For those who plan to move to active DSP integration later, the 3.6K3 CX is a reasonable approach for the passive phase of the build. For those committed to a passive crossover long-term, the 3.6K3HE CX provides a higher-specification option.

HF Audio Perspective

The crossover network is what ties a multi-driver system together. The 3.6K3 CX provides correctly designed passive crossover function matched to the 3000 Series three-way driver combination at a practical price point — completing the passive system without over-engineering it.