Features: 1) Flush mounted in-ceiling, open frame with spring-loaded mounting clamps 2) Red and black push-terminal connectors, metal baffle and grille 3) Available in 3 sizes: 4", 5", 6" T-104: 1) Speaker unit: 4", dual cone, paper 2) Rated power: 5W 3) Line voltage: 100V 4) Impedance: 2k ohms 5) Sensitivity: 92dB 6) Frequency response: 110 - 13kHz 7) Mounting hole size: 165mm 8) Dimensions (W x D): 180 x 55mm 9) Net weight: 0.6kg T-105: 1) Speaker unit: 5", dual cone, paper 2) Rated power: 6W 3) Line voltage: 100V 4) Impedance: 1.7kohm 5) Sensitivity: 94dB 6) Frequency response: 110 - 14.5kHz 7) Mounting hole size: 180mm 8) Dimensions (W x D): 200 x 60mm 9) Net weight: 0.7kg T-106: 1) Speaker unit: 6", dual cone, paper" 2) Rated power: 9W 3) Line voltage: 100V 4) Impedance: 1.1kohm 5) Sensitivity: 94dB 6) Frequency response: 110 - 13kHz 7) Mounting hole size: 225mm 8) Dimensions (W x D): 245 x 70mm 9) Net weight: 1.0kg