Behringer Europower EPX4000 Power Amplifier 2 x 2000 Watts into 2 Ohms, 2 x 1200 Watts into 4 Ohms, 4000 Watts into 4 Ohms (bridge mode) ATR (Accelerated Transient Response) technology for ultimate punch and clarity Ultra-light, ultra-low noise and ultra-efficient switch-mode power supply for noise-free audio, superior transient response and low power consumption Switchable limiters offer maximum output level with reliable overload protection Detented gain controls for precise setting and matching of sensitivity