Select different audio sources, adjust the start-up volume, choose between 3 different optimised DSP and equalizer pre-settings (standard, indoor, outdoor) and 1 custom setting via a 5-band graphic equalizer to create a responsive curve more appealing to your personal taste. Thanks to the dual 24-bit DSP processor you can switch between a direct or wide soundstage. Adjust the balance between two speakers in Twin mode and lock the keypad control buttons (useful in professional settings such as bars and restaurants).