Teds, I removed speakers from a Yamaha keyboard many years ago, no problem. I do not use the keyboard speakers on a job ---

I use one or two Bose L1: I want to hear what the people hearing. I installed outputs to feed the speakers I removed. -----

I am 92 years old, and weight is an issue. When I tried to lift the Yamaha Sx 900, it would not move. It weighs 26 ½ lbs. my 92 years was tested.

John C.