@emergingsoul Wrote:

Why don’t higher end amplifiers come with a separate power chassis?

See below:

Mike

Atma-Sphere MA-3

http://www.atma-sphere.com/en/ma-3.html

@onhwy61 Wrote:

I believe early perfectionist audio systems were derived from equipment used in moving picture show houses. 

True. Like the home speakers from the late 1940's early 1950's. See below:

Mike

https://www.lansingheritage.org/html/jbl/specs/home-speakers/1948-d1000.htm

https://www.lansingheritage.org/html/jbl/specs/home-speakers/1952-c31.htm

https://www.lansingheritage.org/html/jbl/specs/home-speakers/1957-paragon.htm

@emergingsoul Wrote:

Power amps should be designed with a separate power box. Mono blocks are good because they have separate power supplies they just need to be separated it would be interesting to know how big these chassis would be.

 Pretty big. Below are two 150 watt mono block amps with separate power supplies, four chassis.

Mike