Containing a 2 x 40W Class-D digital amplifier, Bluetooth and a MP3 player, these BX40 speakers are more than capable of filling a studio or room with music. An easy-to-use control panel is built in on top of the active speaker. Featuring a tuned port bass reflex design with a 4" Mid-Bass Driver and a 1" Soft Dome Tweeter, the BX40 will provide you with beautiful and powerful sound. Simply plug the active speaker into the mains and connect the other speaker via the supplied cable. Ideal for all your multimedia needs!.