Can anyone confirm this is 600 mA total?


have a look at the Metasonix website. To my amazement, I discovered that "800-850 mA cold startup is required for 3-5 seconds" :-O

http://www.metasonix.com/v3/index.php/r-56-reverb


Thanks, I looked at that and I guess I just couldn't believe my own eyes.  I guess if those 250mA are the limiting factor here, and especially if you have other modules with higher startup requirements, something like this would be of help: http://www.perfectcircuitaudio.com/electronic/modular/cgs763-power-supply-delay.html