Fran,
Besides loud the stereo separation is awesome with th onboard speaker system.
I was told this board does not have the polyphony split with 64 on each side but has the full 128 on each side. I can believe it. this sound system is the best I have ever heard in a portable keyboard. It is prolly because the Roland District Manager set it up because everything is right coming out of the box and that is surely new for me This is the first plug and play keyboard I have ever had. Even the original Clavinet had to have the legs screwed on
Best to all
Bebop