The Bose B2 Bass Module delivers a full, flexible bass sound - extra low end for when you need more powerful bass for larger audiences. The module includes 3 settings for extra flexibility: normal (ideal for bass guitar or kick drum), high (for DJ/music playback and low (for acoustic guitar and vocals). You can power one B2 Bass Module on one Bose L1 Power Stand. The B2 Module is built ruggedly to withstand the knocks of the road and comes with a carry bag. The compact Module has a small footprint compared to many more traditional bass cabs and two can be stacked together using the interlocking end caps. The stand has a Bass Module Out for amplified bass output signal to the B2 bass module. The L1 system automatically adjusts equalisation appropriately when bass modules are connected.