The 903 stereo power amplifier has all the features necessary to amplify a stereo audio signal with no additional frills. That makes this model very cost-effective, and at the same time very practical. The 903 accepts either unbalanced stereo audio on RCA inputs or balanced stereo audio on terminal block connectors and delivers a speaker output of 10 watts RMS per channel into a 4 ohm load. It includes a volume control and has a signal- to-noise ratio of 63db unweighted. The speaker output is on 4-pin terminal block connectors.