The AC -One Controller is a combination of newly-patented PowerMax crossover filter an unusually flexible 3-band EQ a continuously variable infrasonic filter EV's LPN bass/dynamics processing. It is designed for use with sound systems that use 2-way speakers, plus sub woofers. Its excellent audio performance, dynamic range of 117dB, extremely low noise level and the outstanding price-performance ratio makes the AC -One Controller an advantageous alternative to conventional crossover and controller solutions.