http://amp-line.com/products/high-power-piezo-drivers – High power piezo drivers are wideband AC power amplifiers with frequencies ranging from kiloHertz to tens of hundreds of kiloHertz. Typically, they are used for testing or driving acoustic transducers, piezoelectric ceramics, or hydrophones, which require high frequency, high voltage, and high current AC signals. For more information, please visit amp-line.com.