Originally Posted by ChocoHolic
You say it is possible at the same price?
I say it is possible at lower price.
In class D for 1kW or above the required power semiconductors are less, the required PSU is less, the required heat sinks are less.
It is just a question of time until also the low cost manufacturers all over the world (not only China) will gain the necessary know how and the difference in sales price will melt.
Let's not start to discuss if this is good or bad, it's just obvious.
I totally agree with you !
At high power, a SMPS + class D amp is cheaper to manufacture than a Linear PSU + class AB/H one. From my calculation, the inflexion point is actually somewhere around 450W 8ohm / 800W 4ohm where you can get this power with 2 cheap 200V Mosfets and a PSU based on self resonant ETD49 and a halfbridge of cheap 40A IBGT with integrated hyperfast diode. In class AB design, you need a heavy costly 1500VA transformer and at least 6 pairs of 220V/15A bipolar transistors.
The key point, as you said, is the knowledge to make the class D design cost effective, reliable, stable and performing well. And actually in Asia, nobody knows how to do. They only know how to copy (most of the time badly) Lab.Gruppen and powersoft designs which are not cost effective !