The AM-16 Audio Crosspoint Switcher contains a large feature set of tools designed to assist the broadcaster, sound contractor and recording engineer. He is an expandable audio switching matrix built of two primary components-- the AM-16/B Master Crosspoint Switcher, and an optional companion piece, the AM-16/E Expander Module. These two basic blocks can be associated with each other in a variety of ways. The master unit may be operated as a 16 x 16 monaural switcher, or as an 8 x 8 stereo unit. In stereo, audio channels are managed as pairs, and are indicated as 1 through 8 on the displays.