The Genos MS01 Speakers as far as I'm concerned, are ok for when you are playing in a small room at home. Even than, the quality of sound, and low's are missing. Yamaha had to know about this concern when they added these speakers for the basic Genos keyboard speaker sound. I just think that the Genos keyboard is such an advanced keyboard, and with these affordable speakers that they included for the keyboard, just didn't bring the best sound out of the Genos. To pay nearly $5000 for a superior keyboard, and have a sub par speaker system, to me, just doesn't make sense. I understand the weight, and so forth, but the sound that the keyboard produces, is only as good as the speakers.. That's my experience.