Single-channel Class-D amplifier with 240 W power output. Created for 100 V and low impedance high-quality background music systems. Containing Balanced Phoenix & Stereo RCA input and audio link output connectors. Amplifiers have an RS232 control port for integration amplifiers with third-party automation systems that allow using iAC amplifiers in large and complex audio systems that can be automated and controlled remotely. Due to the integrated signal processor, amplifier‘s volume level, tone control, mute, and standby status can be controlled with a rotary selector as well as by RS232 protocol.