Multiroom amplifier 4 x 60 W - Glemm PAA MR 480

4 loudspeakers from 60 W to 8 Ohm. It is possible to connect a USB memory support to play the tracks Mp 3 . But its peculiarity is that it can connect to the internet and then be controlled by its free application. The application manages numerous music software such as spotify.
Connecting multiple amplifiers to the same network will give you a real multiroom audio system.