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

As expected, we’ve seen technically competent remarks from the younger, faster, and better looking members of this group. From an old guy’s perspective, I will add that the additional economic impact of building 2 chassis is significant. Here’s an (incomplete?) list of what happens when you split and amp in half:

- 2 chassis

- 2 faceplates

- 2 on/off switches (maybe)

- 2 shipping cartons

- 2 sets of packing materials

- 2 items to ship, handle. insure against damage

- 2 sets of service literature

- 2 sets of marketing materials (if items sold separately)

- 2 invoices

- 2 items to warehouse, inventory.

- and, last, but not least, 2 items to find room for in a rack, floor, shelf, or doily hanging from the ceiling

From a technical perspective (which I am underqualified to contribute), when high power between components is exposed to the environment, more precautions are needed in the cabling/connections. Thus, more insulation. Some have found that insulators/dialetrics are a factor in sound quality. The cost of the connections/terminators will be higher than if handled internally. But, then there exists the possiblity that the added real estate can allow for larger, more robust components. "If we just had a little more spece, we could have ...."

The two most expensive parts of a solid state power amp?

The chassis, and the power supply.

It’s a cost thing. 
 

Now, as I’m about to build a single ended EL34 power amp, I plan to put the power supply in a separate chassis. Mainly for noise isolation. But, separating the two does come with its own challenges, as had been stated above.

@muvluv What does pro gear have to do with anything as far as this topic goes? You make it seem like studio equipment gave birth to high end audio gear? How about, no…

@perkri i wasn’t talking about studio, that is more on the recording side than the playback side. Live concerts and stuff made for the pros eventually made it into the home.it happened many years ago and people forget easily the past. Also car audio helped advance drivers to handle much higher wattage than their home counterparts

Now it's car audio, two entirely different sets of parameters.

I believe early perfectionist audio systems were derived from equipment used in moving picture show houses.  There has been much evolution since.