The high-quality components and the carefully designed circuits ensure excellent audio performance and extremely liner frequency response. In fact, the switching power technology offers, together with an increased efficiency and a better control of heat dissipation than conventional power supply systems, a drastic reduction of dimensions and weight, for easier transportation and installation. This amplifier guarantees total reliability and a trouble-free use even in the most demanding conditions. We believe the D500.4 will provide a perfect performance, what you get is unprecedented