From the net:
Key Differences & Similarities
3.7i vs 20.7 (Most Comparable): These models share the identical ribbon tweeter and the same size midrange panel, differing mainly in the bass driver area, making the 20.7 physically larger overall.
There probably wouldn't be "Meter Mania" if it wasn't for McIntosh. Please tell me what other company is famous worldwide for having iconic blue meters for as many years as McIntosh.
Loudness buttons that used to be prominent many years ago on receivers and integrated amps have all but disappeared.
High sensitivity/high impedance speakers don't need help jumping to life at low levels (meaning your volume control doesn't have to be turned at least halfway up before your...
It's all about sensitivity and impedance. Low sensitivity/low impedance speakers require more power and current to come to life. It's not that they sound "bad" at low levels, they just don't jump to life as fast as high sensitivity/high impedance speakers do.