The Bose Lifestyle SA-2 Amplifier is a 2-channel amplifier that can be attached to an existing Bose Lifestyle setup to create an additional sound area. This Bose amplifier, when used with select Bose Lifestyle setups, can also route multiple inputs from the same system to different sound areas. The Bose Lifestyle SA-2 Amplifier is scalable, in that you can connect a number of these Bose stereo amplifiers for multiple extra sound areas. This 2-channel amplifier can be easily connected to the Bose Lifestyle media center via the Bose link output. This Bose amplifier has a very small form factor and a compact design.