Yamaha MS40DR Drum Monitor System, Special for Satillite Monitor Soundsystem for E-Dums, 2 x 20 W plus 40 W  Subwoofer, natural Stereo Sound with full powered Subwoofer Bass Tone, mountable on each Yamaha E-Drum-Rack (not Hexrack), Clamps included, Satellites: Tweeter 3/4" Dome, Midrange: 3" Cone, Subwoofer: 6,5" Cone, 32 Hz - 20 kHz, 65 Watt, Satellites: 97 x 159 x 178 mm  (B x H x T), 0,7 kg, Subwoofer: 350 x 210 x 321 mm (B x H x T), 7,4 kg,