QSC class D amps have 3 dB of headroom and are not expensive so it can be done. I understand what you are saying but what I am saying is it is way cheaper to design in 2to 3 db of headroom as compared to 2 to 3 db more continuos power.
My last post on this, I hope, as this is clearly something we will never agree upon.
I do not know what QSC's circuit looks like.
Creating 3 dB headroom means the output components have to support 40% more voltage and all that comes along with that, but does not require additional heat sinking, output devices, and all that jazz. The transformer/power supply has to supply that much more voltage, natch. I agree it is cheaper to design for more headroom than continuous power, but disagree on whether or how much that is a desirable goal or even a significant criteria in amplifier choice, especially given the amount of power class D (or most any AB these days) already provide. I can readily purchase an amplifier with continuous power meeting my needs; perhaps that is not practical for you or others who depend upon extra headroom for transient peaks. But remember 3 dB is not a very large increase in volume, so chances are if you need more than that if you really are underpowered.