The JBL Commercial® CSA-2120 power amplifier is a professional tool designed and built for installed sound applications. The amplifier is a two-channel model providing simple analog front-end processing, with a switch-mode universal power supply.

The amplifier includes two optional accessories: a rack mounting kit and a transformer module. With the rack mounting kit, you can install the amplifier to a cabinet or wall. If your loudspeaker system requires higher impedance, the transformer module can be connected between the amplifier and loudspeaker systems to obtain the impedance matching.