The use of BLUETOOTH 5.0 (compatible with previous versions) for streaming audio from smartphone / tablet that allows the simultaneous recognition of two speakers with the possibility of controlling their volume remotely, in addition to the use of more performing speakers capable of generating a very high sound pressure, very low distortions and an incredibly natural sound. Also new is the “power unit” equipped with a switching power supply with automatic voltage change; an internal ventilation system, with intelligent control of the number of revolutions, allows the operating temperatures of the amplifier to be kept low, guaranteeing its silence. The XPRO 112MA speaker is built in plywood, equipped with two integrated handles; the stand insert allows its use also on a stand support or in any case in a free field.