^ yes.
if I understand right, what you did was plug 2 8 ohm cabs (giving 4 ohms, i think?) into the 8 ohm speaker output.
odds are you're ok, just don't do it again.
actually, come to mention it, i think you're ok the way you did it. I know a 3 ohm speaker into a 4 ohm speaker out, or 15 ohm speaker into a 16 ohm speaker out, is OK.
But don't quote me, lol.
EDIT: scratch that, that may just because they near enough match.
disregard everything in this post but "don't do it again". :lol: