@dman777 matter of sensitivity and gain matching. Don’t worry about it for now. Break it in first.
Changing an amplifier is a major impact on the system. It’s got to be matched with speakers as well as with upstream components and room. Don’t exclude the possibility that you will need to readjust speaker placement. But don’t do anything at all until you have a minimum of 200hrs on it or you will be chasing ghosts.
Good luck!