Does and don't

You can and it will work but it will likely sound better plugged straight into the wall.

Better sound quality by plugging straight into the wall is nearly universal.

Better sound quality by plugging straight into the wall is nearly universal.

Haha!  😆😆😆

@albertballewI don't understand why you want to use a voltage regulator instead of a powerline conditioner unless you are constantly experiencing significant voltage fluctuations from your mains supply.

If mains filtering is a requirement, something like this https://furmanpower.com/products/it-ref-15i which is based on an isolation transformer might be an option where high current is necessary.  These units can be sourced at reputable dealers on the internet new for a fraction of this price if you are interested.