Bose L1B2 Bass Module For the L1 Line Array SystemDelivers The Audio Fidelity Expected From Bose!! Connects to L1 Model I & Model II Adds Depth and Low End The Bose B2 Bass Module is a passive low frequency, portable speaker intended for use with the Bose L1 Model I & Model II Systems. The speaker enhances the low frequency response, adding depth and bass to musical instruments, DJ rigs and other sound reinforcement applications. The B2 may be connected to the power stand of the L1 Model I and L1