Bose L1 Model II with Two B1 Bass Modules | zZounds
Bose B1 Bass Module for L1 Portable PA Systems | Sweetwater
Bose B1 Bass Module for L1 Systems : Electronics - Amazon.com
Standard B1 slip cover
Bose® L1 Model II System with B1 Bass Module Package Portable PA system with two-part 24-speaker array, bass module, power stand with amps, cover, and carrying bags at Crutchfield