Hate fireplace in home theater room

I have a room with a fireplace in middle. Ideal place for a large tv display - ie in front of the unused fireplace. Can’t put above mantel as it would be too high. Room size of 22 x 14 is a nicer size for high end speakers vs smaller den room.
Curious if anyone has placed a screen in front of an unused fireplace. Platform is 12 inch above floor so center spkr would be placed on floor and angled up. Flat screen could be raised to 18 inch above floor level.
Thanks for any comments.