Together in a single device,a processor,compressor and a digital crossover. The 3D stereo surround processor increases spatial sensation of sound and improved stereo image. The processor of bass frequencies creates a bigger transparency and depth sound. The built-in compression system power maximizes the end signal with a compression "inaudible" and transparent. The limiter multiband "brickwall" protects the unit against any signal peak or dangerous pressure level of sound. Also, the built-in denoiser and exciter ensure a free-noise sound and ultra-transparent.The MIDI feature allows control the parameters in real time and program selection.