The integrated zone amplifier offers a variety of easy-to-use input connections (mic/line/page), input gain and output level adjustments, and operational modes. Built-in Bose FreeSpace 3 System, FS3B subwoofer, FreeSpace FS2 and FS4, and DesignMax DM2 and DM3 loudspeaker EQ presets can be selected for loudspeaker optimization.