The E-617 high-power piezo amplifier from Physik Instrumente (Auburn, MA) is suited for high-dynamic switching and scanning applications. Its innovative efficient circuitry based on energy recovery technology reduces power consumption and heat dissipation, especially in dynamic applications. The amplifier generates up to 280 W. It sources and sinks currents to 2 A. Output voltage ranges from 30 to +135 V. Amplifier bandwidth is 3.5 kHz. Amplifier gain is 12.