Rolls HE18 HumEliminator,Bi-Directional

Rolls HE18 — passive bi-directional hum eliminator using transformer isolation to eliminate ground loop hum from balanced and unbalanced audio connections.

The HE18 uses audio-grade transformers to break the ground loop path between audio equipment, removing the 50/60Hz hum that appears when connecting multiple devices to a shared mains supply. Bi-directional design means the same unit works in either signal direction — useful at the input or output stage of a signal chain. Passive operation requires no power. Suitable for home studio, live sound, installed audio, and broadcast applications where ground loop hum between interconnected equipment is a recurring problem.

Passive transformer-based isolation — no power required

Compatible with balanced and unbalanced audio

Suitable for studio, live, installed audio, and broadcast