Rolls HE18
Hum / Feedback Eliminator, RCA


The HE18 is a two channel audio hum and buzz remover. Everyone knows how annoying it is to have 60 cycle hum in your sound. Now you can eliminate virtually all ground hum and buzz by simply inserting the HE18 into the audio path. Plus, the unit will convert an unbalanced signal into a balanced signal, and vice-versa. This greatly improves overall noise performance.


  • Eliminates ground loop hum and buzz
  • Leaves signal grounds connected
  • Passive, the unit requires no power
  • Converts balanced lines to unbalanced lines and vice-versa
  • Adjusts signal voltages to match difference in ground potential


  • Frequency Response: 20Hz to 70kHz, +/-0.5dB
  • Distortion: <0.005% THD @ 1 kHz
  • Crosstalk: >-97 dB
  • Max Source Impedance: 1 kohm
  • Min Load Impedance: 10 kohm

Click to download

Add to Cart

We're sorry, only of this item available

Call a Sales Pro at for more information

Serving Contractors, Dealers, and Installers Since 1977

Contact: 1-800-828-0509 / Hours: Mon - Fri 7:00AM - 7:00PM