The Pure Resonance Audio DA2500 is a dual-impedance 2-channel Class-D power amplifier with a built-in high-efficiency selectable impedance power supply. Each powerful 500W channel has an independent 70V/4Ω - 16Ω switch allowing them to simultaneously use a different impedance, delivering more flexibility in various commercial applications. This high-performance rack mount audio amplifier is a cost-effective solution housed in a standard 1U 19" lightweight chassis. The DA2500 features short-circuit, overload, and overheating protection with cooling fans to provide heat dissipation, maintaining safe operation in environments with long working hours.