Pass X600 Will it heat my room too much ??

I am considering moving from Levinson 436 monoblocks to Pass X600 monoblocks. My only concern is how much they will heat my dedicated 14'x 21' room. I have heard that they would cause me to stop a movie half way thru or I would have to put in a dedicated ac unit to supplement the main ac unit.
Help me out here ladies and gentlemen !!
Thanks for responding if you owm these!!