Re: New QSC amp ????
While I have been out of the trenches for about a decade I am pretty familiar with the history of class D amps for a few decades before that.
In my judgement the low level front end could probably be handled by off the shelf DSP platforms. I guess nowadays you can just about do semi-custom DSP using quasi standard building blocks from a foundry library. (I'm starting to see features show up in microprocessors that they are licensing from Arm Holdings or somebody like that).
The output side is where IMO the heavy lifting is required and there is probably some utility in considering different voltage/power points. FWIW I use a small 1+W class D IC about the size of a hungry wood tick in a battery powered design, and it gets unhappy with much more than 6V supply. Now that's silly low power and for now you guys need to be pimping kW not W.
Interesting... I recall one program we tried years ago back at my old day job to get one of the major switching device manufacturers to just put 4 of their existing devices into a single package with common substrate. There are are obvious and non-obvious benefits from that. They blew it and the thermal resistance (junction to case) of the combined package was so high the part wasn't unable to make serious power. Hopefully the industry has gotten better at packaging since then (15-20 years ago).
The magic number 6 devices per module raises more question than answers in my mind, but I really do not need to know every detail.
Thanks for the info.
JR
