The ExactPower 15A actively removes high frequency irregularities from the waveform; it does not filter them. The work is accomplished by a high efficiency, pulse width modulated power amplifier. Instantaneous correction and wide bandwidth automatically improve the THD of the waveform. Current is stored, supplying bursts when needed. Output impedance is significantly lower than the impedance of the power delivered by the wall receptacle, allowing equipment to function more efficiently. Furthermore... it can easily power amplifiers that tax even the largest, heaviest, and most costly Power Plant beyond capacity.