The MC33178/9 series is a family of high quality monolithic amplifiers employing Bipolar technology with innovative high performance concepts for quality audio and data signal processing applications. This device family incorporates the use of high frequency PNP input transistors to produce amplifiers exhibiting low input offset voltage， noise and distortion. In addition， the amplifier provides high output current drive capability while consuming only 420 A of drain current per amplifier. The NPN output stage used， exhibits no deadband crossover distortion， large output voltage swing， excellent phase and gain margins， low open?loop high frequency output impedance， symmetrical source and sink AC frequency performance. The MC33178/9 family offers both dual and quad amplifier versions in several package options..