Tube Amp Archive

Thanks. I was afraid of something like that. But I mean to remember that I once read that Carlos Santana used to play his Mesa Boogie through a speaker with lower impedance than recommended. Perhaps I misunderstood. My problem is that I have a 12" cabinet that I would like to use with different amps...

What may happen to a tube amp if you use a lower impedance speaker than recommended? (8 Ohms instead of 16)