Armstrong Cirrus 2x2 Ceiling Tiles vs Armstrong 2x4 Acoustic Ceiling Tiles

Buy the Cirrus 2x2 tiles for rooms where sound control matters: they absorb far more echo (NRC 0.70) and their 3/4-inch thickness feels more solid in the grid. Buy the Plain White 2x4 tiles for large, simple ceilings where you want fewer pieces to handle and some sound blocking between rooms (CAC 30). The Cirrus is the better-finished tile; the Plain White is the more basic, moisture-resistant panel.

• Choose the Cirrus 2x2 if you are finishing a studio, office or noisy room and want real echo absorption plus a textured, upscale look.
• Choose the Plain White 2x4 if you are covering a big basement or utility ceiling and want fewer, larger panels that resist moisture and block some sound between rooms.