Xt explained it pretty well I would say.
THe Wikipedia article is a good one and highlights key advantages and disadvantages of each.
The main advantage of Class D is its efficiency, and often a resulting smaller package. Class D amps are a practical alternative in cases where a large heavy and expensive monster class A or class A/B amp would be needed for best results otherwise due to speaker power and current demands. Its a common case these days that smaller inefficient speakers with extended bass are designed to fit tighter quarters. A Class D amp fits this need well. Some good quality 250 w/ch Class D amps with decent current delivery capabilities can be had for less than $1000 these days. Most smaller ineffficient speakers capable of extended bass in larger rooms will likely benefit sonically from teh extra power and current.
In my case I find the high power Class Ds to be uniquely capable of driving the larger OHM speakers that I like, hence my enthusiasm over that pairing in particular. They also benefit my smaller Dynaudio monitors compared to other higher power SS amps I have used in the past, but the benefits are greatest whenever more power and current out of a smaller more efficient package is what the doctor ordered.
THe Wikipedia article is a good one and highlights key advantages and disadvantages of each.
The main advantage of Class D is its efficiency, and often a resulting smaller package. Class D amps are a practical alternative in cases where a large heavy and expensive monster class A or class A/B amp would be needed for best results otherwise due to speaker power and current demands. Its a common case these days that smaller inefficient speakers with extended bass are designed to fit tighter quarters. A Class D amp fits this need well. Some good quality 250 w/ch Class D amps with decent current delivery capabilities can be had for less than $1000 these days. Most smaller ineffficient speakers capable of extended bass in larger rooms will likely benefit sonically from teh extra power and current.
In my case I find the high power Class Ds to be uniquely capable of driving the larger OHM speakers that I like, hence my enthusiasm over that pairing in particular. They also benefit my smaller Dynaudio monitors compared to other higher power SS amps I have used in the past, but the benefits are greatest whenever more power and current out of a smaller more efficient package is what the doctor ordered.