Behringer iNuke NU1000 Ultra-Lightweight High-Density 1000-Watt Power Amplifier Delivers 2 x 500 Watts into 2 Ohms; 2 x 300 Watts into 4 Ohms; 1000 Watts into 4 Ohms (bridge mode) and weighs less than 7 lbs/3.3 kg Ultimate reliability through revolutionary cool-running High-Density Class-D technology with "near-zero" thermal buildup Ultra-efficient switch-mode power supply for noise-free audio, superior transient response and low power consumption "Zero-Attack" limiters offer maximum output level with reliable overload protection Built-in Subwoofer/Satellite crossover for perfect subwoofer operation