95 percent efficient, actually made by zed audio back in 2001, amazing amp, the bigger brother is a legend in compititions as it was in the 50 watt class, only a 60 amp draw and looks in amazing condition directly from cadence themselves
Mine probably closer to 10 years old and I bought it used for $75. Lol. It has taken everything I have thrown at it. Granted the most I have put on it was a pair of old school Cadence 15's, but still... runs 1ohm all day.