[quote name='Mr. Foxen' post='501642' date='May 30 2009, 02:24 PM']Ifs its dual power amps like a Little Giant, then one will be running at 8 and one at 4, with the three cabs, so would be unblalanced.[/quote]
It wouldn't make any difference in the real world - the cab that's on the channel by itself might be 1-2 dB louder, which is about the smallest change you'd notice, even if you have good ears.
As an example, my Hartke would run a pair of cabs at 175 watts each, and the single at 240 watts - a difference of less than 1.5 dB.
A