Monthly Archives: March 2023

TELOS GNR 5.1 PLUS

The Grounding Noise Reducer (GNR) from TELOS AUDIO DESIGNS (TAIWAN) has been around for some years. It has progressed from version 2.1 to version 3.1, then to version 5.1 and (maybe) finally to current version 5.1 Plus. Every upgrade involved new additions to the previous version. The current 5.1 Plus has Schumann Resonators built into its circuitry, and it was …