The ART HVA Series 1 and 4 are class-D installation amplifiers. They are suitable for both 70/100V line installations (selectable through dip-switches). Each channel has its own gain control and LED indicators (signal, clip and protection). The input and output connections are made through Euroblock connectors. The amplifiers are a 1U rack 19 inch size is very appropriate for many types of installations, taking advantage of its multichannel design. Specifications High current switching power allowing high power output with low noise and low distortion Short circuit, thermal and power on/off muting protection Built-in limiter Euroblock input and output Front mounted gain controls for easy access Signal, Clip protect, and Power LED indicators to monitor performance. Disable Amplifier Outputs remotely Priority, remote test trigger Remote Failure Status indicator 2-channel or 4-channel installation amplifier. 70/100V line operation. Power output (70/100V): 2X150W/4X300W 1 U rack 19-inch size. Switching power, class-D amplifier.