These rack mount (2U) mixer amplifiers provide either 60, 120 or 240 watts of power output for speakers which can be 70V, 100V, or 4 - 16 ohms. Every model offers inputs for 2 x 1/4" and 1 x XLR microphones, 2 x RCA line level (BGM) and telephone paging. On the front panel, are level controls for each input, along with bass and treble controls and master volume. All models have 2 x RCA line level output and mic/telephone priority muting.