This audio power amplifier meets the strictest standards for quality and robustness. Using a very special circuit the end stage is always set to CLASS A, without any unnecessary loss of power. That is why it is called "EFFICIENT CLASS A". It is made up of two separate mono amplifiers. By switching both channels into a bridge configuration, a mono amplifier with double power is obtained. A major advantage of this amplifier kit is that NOT A SINGLE ADJUSTMENT is needed to any of the settings ! It comes complete with heatsinks, transformers, housing and front panel. Optionally, a K4021 LED power meter is available.