An in-ceiling speaker with a very slim visible rim and a Uni-Q driver for even coverage with fewer speakers.Ultra Thin Bezel130mm Uni-Q driver array19mm aluminium dome tweeter with waveguideKEF Ci130QR In-Ceiling SpeakerSKU: SP3732ASpecifications Frequency response (±6dB): 45Hz-34kHz Sensitivity: 87 dB Nominal impedance: 8 ohms Recommended amplifier power: 10-100 W Dimensions (H x W x D): 193.4 x 193.4 x 83 mm Cut-out: 158 x 158 mm Weight: 1.35 kg