Yamaha NS-333 bookshelf speaker 2-Way Bass-ReflexSpeaker System Woofers 13cm PMD cone Tweeter 2.5cm aluminium dome with Waveguide horn Frequency Response 60 Hz-35 kHz Nominal Input Power 60 W Maximum Input Power 150 W Sensitivity 87 dB/2.83 V/1 m Crossover Frequencies 3 kHz Impedance 6 ohms Dimensions (W x H x D) 200 x 320 x 213 mm