Sound Appeal SA-100T 100W Class T Digital Audio Amplifier Mini portable design for permanent installations or portable applications; Features headphone amplifier Tripath chip provides class AB audio fidelity while maintaining 85% efficiency; Low distortion rating of .01% at 30 watts. Automatic switching 3.5mm input jacks on front panel Includes short circuit, thermal and overload protection Beautiful compact design features a heavy duty brushed aluminum face-plate and extruded aluminum body