I've got a 5150 Cab that I need to rewire to be 8 Ohms. It may not be possible, though I think it is, and I just haven't found the right diagram to change it. Its currently 16 ohms and has 4 16 Ohm Sheffield speakers in it. Its strange because when I look up the specific speaker, they all come up as 8 Ohms, but the ones i've got are 16 ohm.
I could also wire it at 4 Ohms, but the problem is I have a Marshall cab with 1x12, that his an 8 Ohm Celestion, and I want to use this and the 5150 cab together, So I rewire at 4 ohms, but the Mesa only has one 4 ohm output, and I can't run a 16 And 8, just like I can't run a 4 and 8.
I think you're only going to be able to do 4 Ohm or 16 Ohm. Or 2 sets of 8 Ohm.