A true home audio classic the McIntosh MC2100 stereo power amplifier was manufactured from 1969 to 1977. This one is in excellent physical condition as you can see and it works and sounds fantastic.
Here are the specs that I found on it....
ELECTRICAL: 105w/ch stereo. 210w mono. Response 20-20kHz (+0 -0.25dB). Distortion 0.25%. Noise and hum -90dB. Output impedance 4, 8 and 16 ohms (2, 4 and 8 ohms mono). Damping factor 11. Input impedance 200k. Input sensitivity 0.5v. Sentry Monitor.
MECHANICAL: Chrome chassis. Output barrier strips. Audio inputs. Gain controls. Mono-stereo switch. AC outlet. Fuse. Output socket.
Size 7-3/4"H, 11-3/4"W and 17"D. Weight 57 lb.