Central dSOUND of 1 stereo channel, output power of 60 W for up to 20 modules of control. Light indicators of audio input level, automatic gain control, socket for connection and control of audio sources (500 W), general system clock and self-protection against overloads and short circuits. Internal connection via removable terminal block. Communication with other elements of the system via data bus. Internal battery to maintain data in absence of power supply. Power supply 230 V AC. Output power supply for control modules of 12 V DC. Dimensions 235 x 155 x 81 mm. Finishing ABS / zamack.