The Yamaha MSP3 Active 2-Way Studio Monitor-Each is petite but powerful. Built-in 20W amp, 4" woofer, .75" dome tweeter, RCA and XLR inputs, magnetically shielded. Low/high tone control. Compact size and shielding make them easy to place for best stereo imaging, even where space is limited. 5-11/16"W x 9-5/16"H x 6-9/16"D.