This medium Tier 1 in-ceiling loudspeaker is a two-way model featuring a C-CAM mid-bass driver and C-CAM tweeter. It has a cut-out dimension of 212 mm, revolutionary patented Quik-Link speaker cable connector and Tri-Grip II for quick, simple, reliable and strong installation and fitting. Ideal for cost-effective installations, where product simplicity and solid acoustic performance is required Two-way design 1 x 1" (25mm) C-CAM tweeter with UD Waveguide I for lifelike sound 1 x 7" (178 mm) C-CAM mid-bass driver for clear mid-range and full bass Quik-Link speaker cable connector for quicker installation Nominal Impedance 8 ohm Use with pre construction brackets CM-B if drywall has not been installed yet. Dimensions: Mounting Depth 99 mm (3 7/8”) Cut-Out Hole Diameter 212 mm (83/8") External Dimensions (Including Grille 242 x 242 x 103 mm (91/2 x 91/2 x 44/16") Warranty: Lifetime against manufactures defects