Nexo NXAMP4X4MK2 4 Channel Powered TD ControllersNEXO's expertise in DSP control for high performance loudspeakers is unparalleled in the sound reinforcement industry. And Yamaha has an unrivalled heritage in developing highly efficient and reliable power amplification devices. So when the two collaborate to create a new range of powered controllers, the result is sure to be something special. Rated at 4 X 4500 Watts, the NXAMP4X4MK2 combines advanced signal processing with four state of the art