The PLS-X3 is a Univox PLS-X series is the most efficient professional loop drivers. The units are only 1U high and ½ widths, making it possible to mount two drivers in one single 19” rack mount. Univox PLS-X series uses a 90 % efficient electronic transformer. Energy waste in a conventional power supply is comparably 8-9 times higher. Weight is reduced by use of significantly less copper and other metals than conventional loop drivers, leaving a much smaller carbon footprint. PLS-X loop drivers produces an amazingly clear sound which is not possible using conventional toroid transformers as modulation distortion is unavoidable.