Class A or Class D solid-state amplifiers (modern designs)


Hey guys.

 

Class A is supposedly superior. Something to do with a conduction angle of 360 degrees...so the entire signal gets processed in one go without crossover distortion.

But in terms of sound quality (subjective enjoyment) is there a benefit to Class A? Can class D provide the same level of enjoyment?

 

The dealer I’m talking to says that really nice Class A amplifiers are designed for "reference quality" meaning completely true to the real life performance.

 

Let’s compare and contrast. Which one is technically better?

 

In other words, could you have equal technical performance and quality in a Class D amp?

 

- Jack.

jackhifiguy

Showing 8 responses by holmz

This is a troll question and insult to any audiophile. How can you be an audiophile and not already know which design is superior? Everyone knows Class A is pure euphoria. Stop this noise about Class D. But in the end you make a choice and pay your money. Mine is on Class A and tube amps. That’s all the audio anyone needs. Period. Spare me of your newfangled crap D. 

If ”The Audiophile” is running those big refrigerator boxes with <=2 ohm impedance, which requires lots of watts, then the euphoria of Class-A, or 5W SET amps, is just not going to happen… it will be going from euphoria to anorexia.

In other words, could you have equal technical performance and quality in a Class D amp?

@jackhifiguy by what measure would we consider equal “technical performance” and “quality”?

 

I would suspect that a good salesman would not claim that others are close or better.

But I have also heard nothing but good about Ralph’s work.

There is Purifi and Benchmark that are generally well regarded amps in the Class-D space.

Or… personally… I would only be looking at those three for class-D HiFi amps.

Lyngdorf anyone?      : )

@tunefuldude it is easy to make a cogent argument for them, providing that one abides the loss of “purity”… which is sort of tied to the remove of simple tone controls.

Certainly easier to get a good sound without going to heroic measures. (IMO)

But..no. Typical corporate systems, is what most innovators will run into. A given boardroom of ass-wipes who are paid for how aggressively they can steal from and malign any innovator who is foolish enough to get close to them.

For Purifi and Atmasphere at least, the “ass-wipes,” are simultaneously on the board and also the ones in the lab.