https://www.amp-line.com/products/wideband-power-amplifiers-lf-to-hf
A manufacturer in West Nyack, New York, describes its wideband power amplifiers, which cover the audio range and reach into the ultrasonic and radio frequency range. The page covers output voltage, power ratings, the optional DC-coupled version and how units can be combined for higher power or multi-phase setups. It is written for engineers who work with industrial, research or military equipment.