The JBL HPD8138 is an 8" ceiling speaker designed for use with a pre-install in ceiling backcan, resulting in high-fidelity performance at a cost-effective price point. The 8138 is ideal for a wide variety of commercial sound applications from restaurant and retail to professional offices and reception areas. Product Specifications: Drivers: 200 mm (8 in) Full-Range, Dual-cone Frequency Range (-10dB): 95 Hz – 18 kHz Coverage Angle: 90° conical Sensitivity: 97 dB (2k - 8k Hz) Driver Power Capacity: 40W (160W peak), 2 hrs25W (100W peak), 100 hrs Transformer Taps: 6W, 3W, 1.5W, (0.75W at 70V only) Input Connectors: Bare Wire Magnet: 10 ounces (283 g) Safety Agency: Transformer is UL registered per UL1876 Mounting points: 4 points on 286 mm (11.25 in) diameter mounting circle Ceiling Cutout Size: 300 mm (11.75") with tile bridge and backbox.228 mm (9.0") Net Weight: 1.4 kg (3.0 lb) Included Accessories: Integral grille, 4 pcs M4 x 40 mm tapping screws Optional Accessories: MTC-81BB8 backcan, MTC-81TB8 tile bridge Power Rating: See transformer taps Maximum SPL (1m): 105 dB (top 70V/100V tap) Color: White Backcan: formed steel (accessory) Baffle/Rim: Plastic Plenum Usage: Yes, with accessory backcan