Biamp DJ5500 is a complete DJ control center, designed primarily for live mixing using various signal sources, including turntables, tape machines, audio signals from video equipment, and CD players. It can accommodate three stereo phono sources and six stereo line-level sources for a total of nine stereo inputs. The DJ5500 provides four system outputs: main out (stereo, electronically balanced and floating), monitor out (stereo, electronically balanced and floating), mono out (a mono version of the main signals, electronically balanced and floating), and light send (a post-main, transformer-coupled output that provides an audio drive for lighting control).