The Questyle Audio R100 and R200 Wireless Amplifiers are actually an integration of wireless receiver, DAC and amplifier. The Questyle Audio R100 Wireless Amplifier is a 50W per channel stereo amplifier, whereas, the Questyle Audio R200 Wireless Amplifier is a 200W Mono block switchable between left and right channel via a switch on the bottom of the R200. The Questyle Audio R200, with its high power output (an incredible 20A output current capacity), is able to drive even the most demanding of speaker systems. The Questyle Audio R100 and R200, both feature modified Danish ICEpower Class D amplification modules with an ultra-low distortion of 0.004%, and a Signal to Noise Ratio of 104db, as well as the legendary Wolfson DAC chip to ensure the highest sound performance possible.