Sound box with two in=phase bass loudspeakers - are at front and back to increase bass sound level relative to higher frequency sounds

摘要

The loudspeaker box (10) has two bass loudspeakers (20, 30), one fixed to the front and the other to the rear of the box. Each bass loudspeaker has a magnet, a conical membrane and a chassis. This enables the box radiating bass sound to the same extent as higher frequency sound. The two loudspeakers are in phase so that the volume of bass sound is effectively doubled compared to a box with only one bass loudspeaker. The front (17) and the rear (18) wall each have a sound outlet opening (15, 19).