http://www.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. These are typically used to test, drive, or control acoustic transducers, piezoelectric ceramics, and hydrophones, which require high frequency, high voltage, and high current AC signals. For more information, please visit amp-line.com