No you will not damage the SX-880 if you don’t crank up the volume control knob to high causing the amplifier to start to distort. If you turn the volume control up to high that will drive the amp into clipping, then you could fry your speakers.
If you read any of the links I provided the common thread is not to turn the volume control up too high which would overload the amplifier and cause it to distort and further increase in the volume clipping.
You can drive any amp into distortion/clipping if you crank the volume up high enough. (Depending on the connected source)
If Al, (almarg), by chance has seen your thread maybe he will take the time to chime in. Al will be able to explain in technical terms in a way the layman can easily understand.