Phil Allison wrote:

"David Looser"

OK, it's been a long thread and it's hard to keep track of who said what
about what to who. Suffice it to say here that there is no law I know of
that says that you can't replace a class 2 wall wart with a class 1 power
supply.

** Except the laws of physics.

Safety grounding one side of a 12 volt DC or AC adaptor's output will cause
MAJOR damage with the majority of audio devices that use such supplies.

It is usually essential the output be "floating" for the circuitry inside
the box to work.

True. Hence MUST be Class 2.

Graham