Blue Octave Home RC43 Round In-Ceiling Speakers (White) RMS power is 220 Watts per pair and MAX power is 440 Watts per pair Woofer is 4" Aerated Blue IMPP cone with rubber surround 3-Way Design, PEI dome midrange and soft dome tweeter Frequency Response is 50Hz-25kHz, Sensitivity is 93dB Cut-out Size is 5.43", Frame Dimensions are 6.73", Mounting Depth is 2.25"