Connect the stock +9V wall wart or one of the EVO SUPPLY TWO outputs to the supply input
of the HIFACE EVO TWO (Fig. 2, 8). Please note the HIFACE EVO TWO may also be powered
by the USB bus 5V supply. This happens every time that the device is connected to an
USB bus and no power supply is connected to its supply input. Obviously, in such a
scenario its performance will be sub-optimal.