The Rolls PA202 is a compact class D amplifier offering 20 watts per channel stereo and 40 watts when in bridge/mono mode. The class D low heat design gives the PA202 the ability to be mounted in very tight applications. It will work great in ceilings by projectors, or anywhere small and heat-free amplification is required. The PA202 boasts an all-metal chassis and weighs just one pound. Overall dimension are 6″ X 3.5″ X 1.5″.Bottom mounts are provided for permanent installations. 20W per channel Compact size with mounting tabs Balanced and unbalanced inputs Phoenix type input and output Optical Limiter for maximum clean power output Bridge switch for 40W mono operation Line Input Impedance: 47K Ohms Power Output: 20 Watts X 2 Voltage Gain: 32 dB Maximum Supply Voltage: 30 VDC THD: .05% typical EIN: 3 mV Efficiency: 85% Input Sensitivity: 28 mV Bandwidth: 20Hz – 25 kHz