Not really. I use them as the units I place them in run just under the 1 AMP rating. The rating should really be by AMP and not scale. Now, I have I have an older unit that I see will draw over an AMP, then I will use two decoders, one to handle the current of the motor(s) and the Tsunami for sound. (I think you just looked at a few of my videos)
The new option is the Protocraft modified versions. There selection is not as large as the standard Tsunami's yet. ie the Alco turbo that I have been using.
I am just finishing up rebuilding an Alco S2 using a Canon FN30 motor. Well under an AMP and very powerful.