This small 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 171 mm, revolutionary patented Quik-Link speaker cable connector and Tri-Grip II for quick, simple, reliable and strong installation and fitment. 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 5" (127 mm) C-CAM mid-bass driver for clear mid-range and full bassPatented Quik-Link speaker cable connector for quicker installation Nominal Impedance 8 ohm Use with pre construction brackets CS-B Dimensions: Mounting Depth 99 mm (3 7/8”) Cut-Out Hole Diameter 171 mm (6 3/4”) External Dimensions (Including Grille (H x W x D)) 201 x 201 x 103 mm (7 15/16 x 7 15/16 x 4 4/16") Warranty: Lifetime against manufactures defects