Yes, it is a subwoofer on the floor. The system pictured is the YSTMS50 80 watt system. I don't know if that will be the final audio system but that's what has been suggested.
I think I read somewhere else in my literature from Yamaha yesterday that there would be 4 aux outputs on the back of the TYROS. I'll check that when I get to my store today.
George Kaye
Kaye's Music Scene
Reseda, California