Bose Professional DesignMax DM8C-SUB white - in-ceiling loudspeaker; 1x 8" Woofer; installed easily via QuickHold mounting arms; removable logos; Euroblock connectors; front-access audio wiring; Freuency Range (-10dB): 38 - 155 Hz; nominal coverage angle: omnidirectional below 200Hz; Power handling: RMS 150W / peak 600W; sensitivity (SPL/1W@1m): 89dB; Max SPL @1m: 111 dB /117 dB peak; Transformer Traps: 70V:20, 40, 80, 150 W, bypass, 100V: 40, 80, 150 W, bypass; Impedance: 8 Ohms; Product Dimensions (Grille Diameter × Depth): 409 × 255 mm; Backcan Dimensions (Diameter × Depth): 342 × 241 mm; Cutout size (Diameter): 349 mm; Maximum Ceiling Thickness: 76 mm; Net Weight, Loudspeaker with grille (single): 9,8 kg; colour: white