NEAR-INVISIBLE IN CEILING SURROUND HOME THEATER SPEAKERS SET - Equipped with (2) 0.75" Ring-Radiator Tweeter for detailed highs, and (1) 8" Dynamic Balance Woofer for clean, accurate mids, the 80 F/X-LS speakers produce an enveloping rear soundstage BIG SOUND, NO FOOTPRINT - In ceiling speakers feature Polk's precision-engineered, minimally flanged design and exclusive Sheer-Grille, protruding 7mm from ceiling; speaker virtually disappears in the wall, but room-filling audio is loud & clear FEEL THE HEART-THUMPING BASS - Highly efficient in enclosures, the dual bandpass ports deliver deep, rumbling low & minimize chuffing so that you hear crystal-clear dialogues and sound quality from Polk audio speakers for your movies, music, TV shows EASY TO MOUNT AND INSTALL - Each 80F/X-LS has 4 rotating cams that hold the speaker in place for a simple one-cut, drop-in installation; comes with paintable magnetically-secured metal grille - leave it as is or spray paint BUILD A COMPLETE HOME THEATER SYSTEM - Pair with the Vanishing LS Series center-channel and in-wall speakers or use them as surround speakers in a 5.1 or 7.1 channel home theater configuration along with Polk's floorstanding and bookshelf speakers