Brickwall surge protector with amp

I have read that it is not best to use a surge protector such as Brickwall type with ML amps. This is supposed to be a Levinson suggestion due to the amp not needing the protection and that is unduly may restrict power to amp.
I am using dedicated 20 amp line for amp only and Brickwall says the unit does not restrict power.
Comments PLEASE.
Can't speak to the Levinson amp but I have a brickwall between ac line and a CJ amp and it works fine.

I really like the brickwall FWIW.
I find mine to be nice for line-level components, but power amp performance suffers with it.