I use the Yamaha GNS-MSO1 speaker system for home practice as I do not wish to use my much more powerful monitor system which I use for live performances in the house.
The sound from the system is fine for home use and does justice to the good performance of the Genos keyboard.
The only problem with it is plugging in the 8 pin mini DIN cable as the orientation of the plug to the sockets on the keyboard and the sub woofer are difficult to find. Otherwise very happy with it.