All In One Unit
The Bose L1 Model II is that it is an all in one innovative system, that replaces conventional monitors, mixers and PA speakers.
This system provides astounding uniform sound coverage of nearly 180 degrees not only onstage but throughout an audience of up to several hundred, but here is the big plus, with little drop off in volume and tone quality.
Ease of setup
The complete Bose L1 Model II system can easily fit in to the boot of a car and is very compact and comes with special heavy duty custom padded carrying cases that are extremely durable. The great thing about this system is that there is minimal trailing leads, no spare cables and it is very straight forward to set up.
The system can be completely set up and ready in less that five minutes. The complete Bose L1 Model II system could be carried back a forth on your own, in two trips.
The speakers.
The 24 built in individual speakers are arranged using Articulated Array speaker technology in a slim, vertical enclosure—creating nearly 180 degrees of horizontal coverage and consistent tonal balance.
The Bose L1 Model II speaker’s unusual upright, vertical shape makes it distinctly different from conventional PA speakers and has a very positive clean and clear  effect on sound coverage. The loudspeaker delivers 180 degrees of horizontal sound coverage In fact the same sound can be heard on stage as those in the audience at the front row or at the rear which is a huge plus, also knowing that band members are also hearing the same sound makes for a much more complete performance.
Again the speakers take literally seconds to set up. There are no wires to connect, no cables just clip the lower speaker unit in to the power stand and the upper speaker unit on to the lower unit and your done! No monitor is needed because you can hear the same as the audience.
Spacial Dispersion
The Bose L1 Model II Bose Spatial Dispersion loudspeaker technology delivers sound evenly across the stage and throughout the audience—even to the extreme sides.
Bose use the term “Spacial Dispersion” Basically this means that the loudspeaker technology delivers sound evenly across the stage and throughout the audience even to the extreme sides.
When moving around from extreme far end corners the sound level remains the same clear and vibrant through out. with little volume drop-off over distance even standing near the front of the speakers as opposed to being at the back of the room, quite amazing!
This is a perfect pa system which provides perfectly clean audio sound quality for almost any size gigs.
The Power Stand Integrated system
The Bose L1 Model II power stand weighs 10.7 kg, and its four retractable legs make it easy to transport and set up. The power stand also has a simplified control section; the single line-level input can be used with instruments, mics, mixers, laptops, or MP3 players
All of the system’s components are also built to handle the road and the build quality is absolutely superb, very solidly built and robust. The loudspeaker has a nice strong and rugged, reinforced grille, and each package includes padded carrying bags for major components.

The Bass Module
The bass module that comes with the Bose L1 Model II system is called the B1 bass module, which delivers greater low-frequency output when you need more powerful bass for larger audiences.
This is powered from the main power stand again with just one cable to connect.