Simplex 4100-1329 Primary 100 W Amplifier, 70.7 VRMS, 120 VAC, 60 HzThe digital and analog audio amplifiers provide analog audio power to the system speaker circuits. Digital amplifiers decode digitally encoded input signals and analog amplifiers receive analog input signals. A speaker circuit consists of one or more speakers that are driven by the same physical wiring. All of the 100 W amplifiers described in this document are single channel amplifiers; that is, each speaker circuit is driven by the same audio