ART HVA1 2-Channel 150W 70V Install AmplifierThe 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.