Abstract: A low frequency direct drive amplifier is disclosed which can simultaneously achieve high drive voltages, high power density, high efficiency, and wide bandwidth operation is disclosed. The power circuit structure includes an input DC-DC converter and an output multi-level DC-AC inverter. The input DC-DC converter's circuit topology is commonly referred to as the phase shifted full bridge, which includes input capacitors, a Gallium Nitride (GaN) based full bridge, an isolation transformer, two rectifying diodes, and two series stacked output capacitors. The output DC-AC inverter includes two series stacked input capacitors (same as the input DC-DC converter's output capacitors), four Silicon Carbide (SiC) semiconductors, four Silicon IGBTs, and an output filter. The disclosure's features the combination of the output multi-level DC-AC inverter circuit topology paired with 1.7 kV SiC semiconductors, allowing for a high voltage direct drive design without a low frequency boost transformer.