I'm afraid Farad's data is a bit optimistic. I have tested trying to power a Uptone LPS 1.2 (you need a source that supplies 36 watts) with a 12 volt Farad Super3 and it just can't do it, although they say that at that voltage it supplies 3 Amps.
Francisco, I think we will be right on the dot if we need 36 watts. ( 12v x 3a =36watts)Think it will run hotter and the efficiency could take a hit due to the extra heat. There might not be a buffer to account for the drop in power due to the heat. It will be good if Mattijs can chime in.