You need active speakers (i.e. with built-in amps) with that set it appears, and need to connect them using a 3.5mm mini stereo jack. The tv may have 10w to its own speakers, but not for amplification of external (passive) speakers; I take it you do not have a separate amp for the speakers? I do not know what your options in Italy are for such speakers at your budget or whether they will be able to be powered on simply via the tv turning on either.