The Keysight Technologies, Inc. 33502A is a dual-channel, high voltage output amplifier. It has an isolated analog front end with up to 50 Vpp (± 25 V) output voltage range. It is also a very low-distortion amplifier with < 0.01% @ 10 kHz and 40 Vpp. The 33502A is designed to work as a companion for function generators to offer low-distortion, higher voltage outputs.
The 33502A has a fully isolated front end, which offers superior 5X voltage amplification to other amplifiers. You can independently configure input coupling (AC|DC) and input impedance (50 Ω|1 MΩ) to match you circuit. The input path can also be switched from amplified to direct (unamplified) without removing or connecting cables.