Our statement for the most natural reproduction of any kind of music. Top Line "Bob" XL is a unique combination of horns and open baffle on a small footprint of 23.4 "x 16.3". Each speaker has built-in, DSP-controlled active subwoofers with 3000 watts of amplifier power to perfectly match the bass response to the room. The rest of the speaker works passively with optimal playback from 35Hz. A loudspeaker for larger rooms with a distance to the listener of more than 3 meters.