JMlab Chorus CC70S Centre Speaker - Classic (Calvados/Black Aluminium) - Description: 2-way shielded bass reflex centre channelSpeakers: 2x5-1/2" shielded Polyglass mid-bass,1" TNC inverted dome tweeterFrequency response (+/- 3dB): 65Hz-28kHzSensitivity (2,8V/1 m): 90dBNominal impedance: 8 OhmsCrossover frequencies: 2400HzMaxi and more Home HiFi Systems