Cary Audio Design CAD-211M is a mono block amplifier that delivers 80 watts of power with zero feedback. It features a tube compliment of 2-845 Output, 2 - 300B Driver, and 2 - 6SN7 Input. The CAD-211M has a frequency response of 20Hz-20kHz and a signal-to-noise ratio of 80dB. It has a sensitivity of 2V and an input impedance of 100k ohms. The CAD-211M is a high-quality amplifier that is perfect for use in a home audio system. It is capable of delivering detailed and accurate sound reproduction, and it is powerful enough to drive even the most demanding speakers.