BOSE L1 Model II systems are a high-quality, portable amplification system for musicians, singers, DJs and public speakers. This package includes Bose's critically acclaimed B2 bass module, as well as an L1 Model II cylindrical radiator. It is a portable, efficient, professional-sounding system.These loudspeakers deliver wide horizontal sound coverage and a smooth tonal balance-across the stage and throughout the room. Lightweight and modular, this sleek system fits easily into a car trunk and takes just a few minutes to set up.Like the original, award-winning BOSE L1 system, the Model II sound system is an all-in-one innovation that replaces conventional monitors, mixers and PA speakers. And this professional sound system is packed with proprietary Bose technologies designed to improve your amplified sound.The system's breakthrough loudspeaker produces wide, uniform sound coverage of nearly 180 degrees-onstage and throughout an audience of up to several hundred-with little dropoff in volume and tone.The Model II system also features Articulated Array speaker technology for better tonal balance. The loudspeaker's 24 vertically mounted drivers are precisely angled to create clearer highs and more consistent tone in the room. Even people off to the sides of these stage speakers enjoy well-balanced, detailed sound.This BOSE L1 Model II system comes with a B2 bass module to ensure more accurate amplification of lower notes for most voices and instruments-including guitars, keyboards and various horns. The double bass package is recommended for use as a bass guitar amplifier, and for kick drums and DJs.The BOSE B2 bass module is a high performance flexible bass solution designed for L1 Model 1S and Model II systems. It fea