SoundTube SA202-II Class AB Mini AmplifierThe SA202 II and SA202 II RDT are 20 watt per channel (4 ) Class AB amplifiers with maximum gain of 35 dB. Input options include dual RCA jacks and a stereo mini jack for line level audio sources and a speaker level (amplified) input for applications with low wattage speaker outputs (e. g., A V projector to external speakers). A 15 V power supply is included with the SA202 II RDT. Mounting hardware is included and adapts to pole, surface or security