Two independent 6dB/octave crossover channels Overall frame diameter: 9.01" Required cutout: 7.60" Power capacity: 50W RMS per channel Frequency response: 35Hz~20KHz This Single Point Stereo Ceiling Speaker Pair features a 6 1/2"polypropylene cone woofer with rubber surround, Intended for small areas that do not justify installation of two speakers, this single stereo speaker provides both left and right audio channels from a single point.