what is my f50's wattage @ 4ohms vs. 8?

[cliff hetfield]

just got my 2x12 empty cabinet from sscabs on ebay.(loving it, i might add)
the 2x12 is 4 ohms, and im using the 4 ohm output jack on the amp.
so my question is, whats the wattage of the f50 at 4 ohms into a 4 ohm cab?

 

[Lespaulstandard]

50W. tube amps are the same output as long as the impedance matches.

 

[cliff hetfield]

ok, thanks