The JBL's CSA2120 2-channel installation sound power amplifier is designed for installed sound applications and delivers 120 watts per channel at 4 or 8 ohms. Dual summing RCA inputs and a 3-pin detachable Euroblock input are available on each of the unit's two input channels. Both channels have a configurable limiter and a 70Hz high-pass filter. For powering twin loudspeakers, the CSA2120 incorporates a 4-pin Euroblock output connector. When no signal is detected, the auto-standby mode turns off the amplifier pulse width modulation generator.
With the accompanying rackmount kit, the CSA2120 offers both overheat and low-voltage protection and can be rackmounted. It contains channel volume controls on the front panel, as well as clip, signal, and power LED indications. A switch-mode universal power supply powers the device.