Crown 280A 2-Channel Power Amplifier is a high-value amplifier for commercial and industrial audio. It provides 4-ohm and constant-voltage outputs (70V and 100V). Crown 280A 2-Channel Power Amplifier has a wide range of commercial applications including schools, hospitals, factories, restaurant/retail, houses of worship, fitness facilities, A/V boardrooms, prisons, and small offices. Typical uses are paging, background music, security and evacuation instructions. Crown 280A 2-Channel Power Amplifier has 2 input and dual 80W power amplifiers for two-zone systems. The sound system can be upgraded as a facility expands. For example, you can add more mixers for more inputs, or add more power amps (or mixer-amps) to handle more zones.