The Base Unit contains some unique features of its own. Painted to match the head unit it is futuristic in its own way and looks appealing both next to the head unit and out of the way on the floor. Its oval and arched sides mimic a mini silo that feeds power and sound to the head unit while masquerading as a subwoofer.
The Base Unit is of Bose's Acoustimass speaker technology launching sound on a moving air mass instead of directly off the vibrating cone which gives the illusion that bass is coming from the drivers in the head unit.
Inside is Bose's proprietar electronics for active equalization and amplification in three separate channels that give the listener a smooth, crisp performance not normally found in a home computer system.
Photo credits: all images by Tom Willits except bottom right from promo video
Under the Base Unit is a volume control for the sub, a volt selector, a place for the power cord and the umbilical connection. A green light next to the volume control lights when powered up.
Unboxing - part 4
Box 3 houses the Base Unit, and is also protected with foam inserts to keep it secure during shipping and storage process.
After opening the carton from the top, the upper foam insert is removed and then one needs to lift the Base Unit from the bottom and carefully pull it out of the tall square box and remove the plastic cover.
Depending on location the power select switch found on the bottom near the power cord outlet will need to be set or the Base Unit cound suffer permenant damage. At the time of original purchase the switch should have been placed in the proper setting.
Once those steps are complete the umbilical can be connected. This is done by carefully linning up the two ends by the markers and then twisting the cabel until it is locked in position.