Why aren't power amplifiers regulated?

The power supplies in power amplifiers are rarely regulated. Instead, they are sloppy and noise filled. Why don't designers regulate the voltage in them and wouldn't they perform better if they were? Have a question you'd like to ask Paul? http://www.psaudio.com/ask-paul/

I am getting close to publishing my memoir! It's called 99% True and it is chock full of adventures, debauchery, struggles, heartwarming stories, triumphs and failures, great belly laughs, and a peek inside the high-end audio industry you've never known before.

I plan a few surprises for early adopters, so go to https://www.paulmcgowan.com and add your name to the list of interested readers. There's an entire gallery of never before seen photos too.