BEHRINGER EUROPOWER EPQ450 2 x 230 Watts into 4 Ohms; 2 x 130 Watts into 8 Ohms 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 Independent limiters for each channel offer maximum output level with reliable overload protection Detented gain controls for precise setting and matching of sensitivity