Significant redundancy was built into these headsets, as each microphone circuit had two transducers and each receiver had 5 transducers—in addition, the headsets were used in pairs.
Tieto slúchadlá boli veľmi naddimenzované, každý mikrofón mal dva prevodníky a každý prijímač mal 5 prevodníkov, navyše boli používané v páre.