A no compromise, super high performance, 162 Watts into 8 Ohms (250 Watt 4 Ohms),dual mono amplifier housed in a custom Rega CNC machined aluminium case. Designed around "minimalist" high gain power amplifier and "passive pre-amplifier" circuit topology, a passive volume control and a single stage of power amplification between the input and the speakers, the Osiris offers unrivaled performance and build quality.