A standard integrated amplifier has the dual task of both processing and amplifying audio signals, and is therefore susceptible to interference from digital circuitry. As a dedicated power amp with all-analog circuitry, the ADM-20.4 is protected against digital interference. When partnered with a quality pre-processor, this unit offers all the benefits of pure analog amplification: a warm, musical, and full-bodied sound. The ADM-20.4 sports plug-compatible speaker posts to ensure a positive connection to the loudspeakers of your choice. Line-in and line-out ports provide the multi-room capabilities to which this amplifier is perfectly suited. A standard integrated amplifier has the dual task of processing and amplifying audio signals and is therefore susceptible to interference from digital circuits. As a dedicated power amplifier with fully analog circuitry, the ADM-20.4 is protected against digital interference. When partnered with a quality preprocessor, this unit offers all the benefits of pure analog amplification: a warm, musical, full-bodied sound. The ADM-20.4 Sports Speaker is compatible with plugs to ensure a positive connection to the speakers of your choice. Line in and line out ports provide the multi-room capabilities this amp is perfectly suited for..PZA MORE SPECS