yamaha NS-55

 Dual 20 cm Woofers, 10 cm Midrange and 3 cm Tweeter
 Input Power (max/nominal): 250 W/70 W
 Frequency Response: 40-20000 Hz
 SPL: 90 dB/W/m
 Impedance: 6 ohms
 Front Grille Detachable
 264 x 886 x 316 mm (W x H x D)
 14,3kg