Crown CDi 2000 Two-Channel, 800-Watt @ 4Ω, 70V/140V Power Amplifier Extremely versatile; rated for 2-, 4-, 8-ohm loads and 70V and 140V outputs. Switch-mode universal power supply. Intuitive front-panel LCD screen for quick, easy configuration. Onboard digital signal processing includes crossovers, EQ filters, delay, and output limiting. Up to 20 user defined DSP presets are available. Good to handle PA(Public Adress) System