Someone just gave me a speaker cabinet - 1x15".
I think it's probably from a PA system but I was thinking of using it for my Peavey 100W head at rehearsals, to save me lugging a 4x12 around.
Now, the Peavey has selectable output impedance - 4, 8 & 16 ohm.
The 1x15 had nothing on it, so I measured the impedance - 6 ohm!
So do I set it to 4 or 8?