Thermotron’s modular power amplifier for the electrodynamic vibration shaker system is air-cooled and highly efficient to drive the vibration shaker to full output capability over a user-specified frequency range. The amplifier uses state-of-the-art IGBT technology, combining the fast switching of a MOSFET with the high current capability and low power dissipation of a bipolar transistor. Each IGBT is controlled by a high tech driver IC which continually monitors every switching element for fault conditions and safely shuts down the system before components can fail.