Cary Audio Design CAD-211M is a mono block amplifier. It has a power output of 250W, and a frequency response of 80dB below rated output. It has a sensitivity of 2 - 845 Output, 2 - 300B Driver, 2 - 12AU7 Input, and an output impedance of 4,8 and 16 ohm. The CAD-211M is a high-quality amplifier that is perfect for use in a home audio system. It is capable of delivering clear and powerful sound, and it is built to last.